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LAN8720AI-CP - 10/100 RMII Ethernet PHY | Microchip
LAN8720AI-CP

LAN8720AI-CP - 10/100 RMII Ethernet PHY | Microchip

The Microchip Technology LAN8720AI-CP is a small-footprint 10BASE-T and 100BASE-TX Ethernet transceiver with an RMII interface, auto-negotiation, and HP Auto-MDIX support. It is supplied in a 24-SQFN package measuring 4 mm by 4 mm and is designed for embedded systems requiring 10/100 Ethernet connectivity with a 50 MHz RMII MAC interface. An Ethernet physical-layer transceiver, commonly called an Ethernet PHY, converts between digital MAC signals and analog signals carried over twisted-pair cabling. The LAN8720AI-CP occupies the PHY level within the Ethernet hierarchy, working alongside an Ethernet MAC rather than replacing it. Its RMII connection reduces the number of parallel data lines required between the PHY and the host controller. The device supports 10BASE-T and 100BASE-TX operation through automatic speed and duplex negotiation. HP Auto-MDIX allows direct-connect or crossover LAN cables without manual cable selection. It also supports IEEE 802.3-2005 compliant register functions as well as vendor-specific register functions, giving embedded software both standardized and device-specific configuration options. Microchip identifies the LAN8720A and LAN8720Ai as compact solutions with up to 40% lower power consumption than earlier Microchip transceivers. The family integrates a voltage regulator and ESD-protection components to help reduce bill-of-material requirements. The LAN8720AI-CP connects to an Ethernet MAC through a standard RMII interface and supports both 10 Mbps and 100 Mbps operation. Typical uses include industrial Ethernet controllers, embedded Linux systems, programmable logic controllers, factory automation equipment, IoT gateways, and compact network adapters. The small 4 mm by 4 mm package also makes the device suitable for space-constrained boards where a conventional magnetics-heavy Ethernet implementation would be difficult to place. When designing around the LAN8720AI-CP, verify the RMII signal mapping, clock requirements, supply sequencing, magnetics selection, and Ethernet magnetics implementation against the manufacturer datasheet. Layout should keep the digital RMII interface away from the analog magnetics and provide a controlled return path beneath the high-speed differential pairs. Use the manufacturer pin-description table when assigning PCB tracks. This page combines device identity, package details, interface capabilities, replacement guidance, application engineering notes, and side-by-side alternatives. It is intended to help engineers locate the correct datasheet, assess board compatibility, select companion components, and determine whether a proposed replacement is genuinely pin-compatible rather than merely functionally similar.

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LAN8740A-EN - 10/100 Ethernet PHY | Microchip Technology
LAN8740A-EN

LAN8740A-EN - 10/100 Ethernet PHY | Microchip Technology

The Microchip Technology LAN8740A-EN is a single-channel 10BASE-T/100BASE-TX Ethernet physical-layer transceiver with a 32-pin SQFN package measuring 5 mm by 5 mm. It supports MII and RMII host interfaces, operates at 10 Mbps or 100 Mbps, and includes variable I/O voltage, auto-negotiation, HP Auto-MDIX, cable diagnostics, and deterministic loopback delay. An Ethernet PHY is the physical-layer interface between a network media-access controller and twisted-pair cabling. Within the Ethernet interface hierarchy, the PHY connects a digital MAC to the analog 10BASE-T or 100BASE-TX line interface. The LAN8740A supports IEEE 802.3, IEEE 802.3u, and IEEE 802.3az Energy Efficient Ethernet operation, placing it in the low-power 10/100 Ethernet transceiver category. Key features include support for both straight-through and crossover cables through HP Auto-MDIX, automatic speed and duplex-mode selection, variable I/O voltage, and cable diagnostics that can reduce installation and troubleshooting costs. Commercial and industrial temperature variants are offered because the LAN8740A/LAN8740Ai family is specified from 0°C to 70°C or -40°C to 85°C, depending on the selected ordering option. The device is designed for embedded systems requiring a compact 10/100 Ethernet interface rather than gigabit data rates. MII support offers a parallel host interface for designs using the larger pin assignment, while RMII reduces the number of host-side signals and can simplify connections to controllers that support that interface. Auto-negotiation allows the PHY to select the best supported speed and duplex combination with the link partner. Typical uses include industrial controllers, embedded network equipment, set-top and communications appliances, and connected industrial products requiring a compact Ethernet front end. A 5 mm by 5 mm surface-mount package supports compact board layouts, but correct magnetics, termination, reference-clock implementation, decoupling, and high-speed layout remain essential for reliable links. Designers should follow the manufacturer datasheet and its reference circuit for the 25 MHz crystal or oscillator network, magnetic isolation, center-tap capacitors, and PCB layout. The 5 mm by 5 mm package also requires careful thermal assessment when the PHY operates continuously in an enclosed system. This page consolidates manufacturer specifications, distributor availability information, package details, and verified cross-reference evidence into an engineering-oriented guide. It also distinguishes documented functions from parameters that still require confirmation from the complete manufacturer datasheet or a detailed PCB design review.

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LAN8740AI-EN - 10/100 Ethernet PHY, RMII/MII, 32-SQFN | Microchip
LAN8740AI-EN

LAN8740AI-EN - 10/100 Ethernet PHY, RMII/MII, 32-SQFN | Microchip

The Microchip LAN8740AI-EN is a single-port 10/100 Base-T Ethernet physical layer (PHY) transceiver with MII and RMII host interfaces, offered in the 32-pin SQFN (5x5 mm) package and rated for the industrial -40 °C to +85 °C temperature range. The 'AI' suffix denotes the industrial temperature grade, while '-EN' identifies the standard tray/tube ordering code of the LAN8740Ai family. An Ethernet PHY is the physical-layer transceiver that converts parallel digital data from a MAC into differential 10BASE-T or 100BASE-TX signalling on a twisted-pair cable, and converts the incoming analogue signal back into digital words. In the OSI hierarchy a PHY sits below the MAC inside the data-link layer, and the device therefore belongs to the network interface controller family of integrated circuits alongside MAC controllers and USB-to-Ethernet bridges. Key features include auto-negotiation for automatic speed and duplex selection, HP Auto-MDIX for direct-connect or crossover cable use without manual crossover wiring, auto-polarity correction, deterministic loopback delay for real-time system performance, and cable diagnostics that reduce installation and service cost. The device is compliant with IEEE 802.3 and IEEE 802.3u and is well suited to consumer, embedded and industrial equipment. The LAN8740Ai also carries Microchip's flexPWR technology, an integrated low-power design approach that removes the need for an external switching regulator for the PHY core. This reduces board area, component count and overall system power, which is decisive in battery-backed and Energy Efficient Ethernet designs where the PHY is frequently the largest standby consumer on the board. Typical uses include industrial Ethernet gateways, PLC and HMI panels, IP cameras and NVRs, set-top boxes and consumer set-top equipment, printer and copier controllers, embedded Linux boards using an RMII-capable SoC, and network-connected sensors and IoT nodes. The small 5x5 mm footprint keeps the PHY compact enough for space-constrained embedded boards while the 32-pin SQFN keeps the pin count manageable for four-layer PCB design. The main design trade-off is interface choice: RMII reduces the host pin count to a minimum and therefore lowers EMI and cost, but it is sensitive to clock timing and requires a stable 50 MHz reference, whereas full MII offers a parallel, more forgiving bus at the expense of roughly thirty signal pins. Commercial designs should confirm RMII clock, reference and crystal/oscillator requirements against the manufacturer datasheet before layout is frozen. This page consolidates the manufacturer device documentation, verified distributor listings, drop-in alternatives and practical PCB and layout guidance into a single design reference, so that schematic and layout decisions for a LAN8740Ai-based Ethernet port can be made without assembling the same information from many sources.

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LAN8741AI-EN - 10/100 Ethernet PHY | Microchip Technology
LAN8741AI-EN

LAN8741AI-EN - 10/100 Ethernet PHY | Microchip Technology

Microchip Technology LAN8741AI-EN is a 10/100 Base-T/TX Fast Ethernet physical-layer transceiver with a Full MII or RMII MAC interface, operating at 10 Mbps or 100 Mbps. The device is housed in a 32-SQFN package measuring 5 mm by 5 mm and supports industrial-temperature operation from -40°C to 85°C. Its primary interfaces are MII, RMII, 10BASE-T, and 100BASE-TX. An Ethernet physical-layer transceiver, commonly called an Ethernet PHY, converts between digital MAC signals and analog signals carried over twisted-pair cabling. Within the network hierarchy, LAN8741AI-EN belongs to the Ethernet interface IC category and implements the physical layer required by a 10/100 Fast Ethernet MAC. It adds negotiated speed and duplex selection, HP Auto-MDIX cable handling, Energy Efficient Ethernet support, and power-saving sleep functions to the basic physical-layer function. The LAN8741AI-EN supports IEEE 802.3az Energy Efficient Ethernet, full-duplex 10BASE-T and 100BASE-TX links, automatic speed and duplex negotiation, and HP Auto-MDIX. HP Auto-MDIX allows a direct-connect or crossover cable to be used without manually reconfiguring the PHY. The manufacturer also identifies deterministic loopback delay as a feature for real-time system performance, making the device relevant to deterministic embedded networking designs. Communication with the Ethernet MAC is performed through standard MII or RMII interfaces. IEEE 802.3u-compatible MII operation provides a parallel digital interface, while RMII reduces the number of required signals. The interface choice allows the PHY to be paired with an embedded controller, microcontroller, application processor, or other MAC-capable host according to the system clocking and signal-count requirements. Typical uses include industrial control equipment, embedded Ethernet gateways, factory automation nodes, building automation controllers, network-connected sensors, and compact communication modules. The industrial temperature range supports designs expected to operate across extended commercial environments, although system designers must also verify thermal, isolation, magnetics, and regulatory requirements for their installation environment. PCB implementation should account for the 5 mm by 5 mm SQFN footprint, exposed-pad thermal management, short high-speed traces, controlled return paths, and the external magnetics required by the Ethernet physical layer. Keep the digital MAC interface separated as far as practical from the analog network-side circuitry, and use the manufacturer’s reference layout and component guidance to preserve signal integrity and reliable auto-negotiation. This product page organizes the LAN8741AI-EN’s interface capabilities, package information, operating ranges, available drop-in alternative, application guidance, and design considerations. It also identifies the engineering details that require confirmation against the manufacturer datasheet, particularly pin assignments and detailed electrical limits.

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LAN8742-CZ - 100Mbps Ethernet PHY with 24-QFN
LAN8742-CZ

LAN8742-CZ - 100Mbps Ethernet PHY with 24-QFN

The Microchip Technology LAN8742-CZ is a low-power 10BASE-T/100BASE-TX Ethernet physical-layer transceiver with a 100 Mbps maximum link rate, variable I/O voltage, and a 24-pin QFN package. It supports the IEEE 802.3 and IEEE 802.3u standards and is designed to connect an Ethernet MAC through an RMII interface to copper twisted-pair Ethernet magnetics. The verified search data identifies it as an Ethernet controller interface device and a 1/1 driver-receiver configuration with full-duplex RMII support. An Ethernet PHY is the physical-layer device that translates digital MAC data into electrical signaling for a network cable and converts received cable signals back into digital data. In the hierarchy, the LAN8742-CZ belongs to the Ethernet transceiver, network-interface, integrated-interface-IC, and broader semiconductor categories. Placing a PHY between a host controller and an RJ45 magnetics assembly allows a microcontroller, application processor, or dedicated Ethernet controller to connect to 10 Mbps or 100 Mbps copper networks without implementing the analog cable interface directly. Verified features include 10BASE-T and 100BASE-TX operation, auto-negotiation, HP Auto-MDIX, Energy Efficient Ethernet support identified in the family description, and Wake-On-LAN functionality identified for the LAN8742 family. The variable I/O voltage allows the digital interface voltage to be selected for integration with a host, while the compact 24-QFN, 4 x 4 mm package supports space-constrained embedded designs. The verified results also describe cable diagnostics support, although detailed diagnostic limits are not supplied. The LAN8742-CZ is normally used as the PHY beside a 10/100 Ethernet magnetic module and RJ45 connector. RMII connects the PHY to the MAC, reducing the number of parallel data and control signals compared with older MII implementations. The PHY supports 10 Mbps and 100 Mbps operation and automatically negotiates the best supported speed and duplex mode, simplifying host-side configuration. Exact timing, current, voltage-range, temperature, and package-dimension details require the manufacturer datasheet and are not inferred here. For new production designs, verify lifecycle status and sourcing before committing to an obsolete device. The verified cross-reference data specifically identifies LAN8742A-CZ-TR as a compatible substitute with extended availability, while also describing LAN8742AI-CZ-TR as a direct pin-compatible replacement. Any substitution should be checked against the exact RMII pin mapping, voltage domains, package exposed-pad requirements, magnetic-device pinout, and system timing. This page combines verified distributor and manufacturer information with application guidance, replacement context, and package-focused design notes. It does not invent unpublished pricing, electrical limits, pin names, or lifecycle dates; unavailable values are explicitly marked for engineering review.

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LAN8742-CZ-TR - 100Mbps Ethernet PHY with 24-QFN (Tape & Reel)
LAN8742-CZ-TR

LAN8742-CZ-TR - 100Mbps Ethernet PHY with 24-QFN (Tape & Reel)

The Microchip Technology LAN8742-CZ-TR is a low-power 10BASE-T/100BASE-TX Ethernet physical-layer transceiver with a 100 Mbps maximum link rate, variable I/O voltage, and a 24-pin QFN package. It supports the IEEE 802.3 and IEEE 802.3u standards and is designed to connect an Ethernet MAC through an RMII interface to copper twisted-pair Ethernet magnetics. The verified search data identifies it as an Ethernet controller interface device and a 1/1 driver-receiver configuration with full-duplex RMII support. An Ethernet PHY is the physical-layer device that translates digital MAC data into electrical signaling for a network cable and converts received cable signals back into digital data. In the hierarchy, the LAN8742-CZ-TR belongs to the Ethernet transceiver, network-interface, integrated-interface-IC, and broader semiconductor categories. Placing a PHY between a host controller and an RJ45 magnetics assembly allows a microcontroller, application processor, or dedicated Ethernet controller to connect to 10 Mbps or 100 Mbps copper networks without implementing the analog cable interface directly. Verified features include 10BASE-T and 100BASE-TX operation, auto-negotiation, HP Auto-MDIX, Energy Efficient Ethernet support identified in the family description, and Wake-On-LAN functionality identified for the LAN8742 family. The variable I/O voltage allows the digital interface voltage to be selected for integration with a host, while the compact 24-QFN, 4 x 4 mm package supports space-constrained embedded designs. The verified results also describe cable diagnostics support, although detailed diagnostic limits are not supplied. The LAN8742-CZ-TR is normally used as the PHY beside a 10/100 Ethernet magnetic module and RJ45 connector. RMII connects the PHY to the MAC, reducing the number of parallel data and control signals compared with older MII implementations. The PHY supports 10 Mbps and 100 Mbps operation and automatically negotiates the best supported speed and duplex mode, simplifying host-side configuration. Exact timing, current, voltage-range, temperature, and package-dimension details require the manufacturer datasheet and are not inferred here. For new production designs, verify lifecycle status and sourcing before committing to an obsolete device. The verified cross-reference data specifically identifies LAN8742A-CZ-TR as a compatible substitute with extended availability, while also describing LAN8742AI-CZ-TR as a direct pin-compatible replacement. Any substitution should be checked against the exact RMII pin mapping, voltage domains, package exposed-pad requirements, magnetic-device pinout, and system timing. This page combines verified distributor and manufacturer information with application guidance, replacement context, and package-focused design notes. It does not invent unpublished pricing, electrical limits, pin names, or lifecycle dates; unavailable values are explicitly marked for engineering review.

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LAN8742A-CZ - 10/100 Ethernet PHY, RMII, 24-SQFN | Microchip (Tape & Reel)
LAN8742A-CZ

LAN8742A-CZ - 10/100 Ethernet PHY, RMII, 24-SQFN | Microchip (Tape & Reel)

The Microchip LAN8742A-CZ is a low-power 10BASE-T/100BASE-TX Ethernet PHY transceiver with variable I/O voltage, packaged in a 24-pin SQFN (4x4 mm) and supplied on tape and reel. It supports MII and RMII MAC interfaces, operates from a 1.8V to 3.3V variable I/O supply, and is IEEE 802.3 / 802.3u compliant. The device integrates auto-negotiation, auto-polarity correction, and HP Auto-MDIX, eliminating the need for crossover cables. It is well-suited for consumer, embedded, and industrial Ethernet applications. A PHY (physical layer transceiver) is a key element of any Ethernet link: it sits between the MAC controller and the magnetic transformer/RJ-45, handling line encoding/decoding, link training, and electrical signaling over twisted-pair copper. PHY transceivers are part of the broader category of Ethernet interface ICs, which include MAC controllers, switches, and integrated MAC+PHY SoCs. The LAN8742A specifically implements the 10/100 Mbps copper PHY only; higher-speed Gigabit (1000BASE-T) PHYs use multi-level signaling (PAM) and more pins. Key features of the LAN8742A-CZ include Wake-On-LAN support for system-level sleep modes, cable diagnostics for fault detection, and flexPWR flexible power technology for low-power operation. The variable I/O voltage (1.8V-3.3V) allows direct connection to low-voltage MCUs without level shifters. The HP Auto-MDIX feature automatically detects and compensates for TX/RX pair swaps, allowing either straight-through or crossover cables to be used interchangeably. Architecturally, the LAN8742A employs DSP-based echo and crosstalk cancellation to achieve robust 100BASE-TX performance over Cat5 cable. The on-chip PHY includes an integrated termination network and uses energy detect plus power-down modes to meet modern standby-power requirements. MII and RMII MAC interfaces are selectable via strap pins, allowing the same part to be paired with virtually any MCU or SoC MAC. Typical applications include IoT gateways, industrial Ethernet nodes, embedded web servers, building automation controllers, IP cameras, and consumer electronics requiring a wired network connection. The wide 1.8V-3.3V I/O range and low power consumption also make it attractive for battery-powered Ethernet-enabled devices. When designing with the LAN8742A-CZ, follow the Microchip LAN8742 QFN Routing Checklist for proper PCB layout - the analog ground plane and 50-ohm impedance-controlled differential pairs are critical for radiated emissions and signal integrity compliance. Decoupling capacitors must be placed adjacent to each power pin, and the magnetics must be specified to IEEE 802.3 isolation and return-loss specifications. This page synthesizes distributor pricing, drop-in same-BLAN alternatives, and Microchip application-note design notes not found in the manufacturer datasheet alone - giving engineers a single, decision-ready reference.

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LAN8742A-CZ-TR - 10/100 Ethernet PHY, RMII, 24-SQFN | Microchip
LAN8742A-CZ-TR

LAN8742A-CZ-TR - 10/100 Ethernet PHY, RMII, 24-SQFN | Microchip

The Microchip LAN8742A-CZ-TR is a low-power 10BASE-T/100BASE-TX Ethernet PHY transceiver with variable I/O voltage, packaged in a 24-pin SQFN (4x4 mm) and supplied on tape and reel. It supports MII and RMII MAC interfaces, operates from a 1.8V to 3.3V variable I/O supply, and is IEEE 802.3 / 802.3u compliant. The device integrates auto-negotiation, auto-polarity correction, and HP Auto-MDIX, eliminating the need for crossover cables. It is well-suited for consumer, embedded, and industrial Ethernet applications. A PHY (physical layer transceiver) is a key element of any Ethernet link: it sits between the MAC controller and the magnetic transformer/RJ-45, handling line encoding/decoding, link training, and electrical signaling over twisted-pair copper. PHY transceivers are part of the broader category of Ethernet interface ICs, which include MAC controllers, switches, and integrated MAC+PHY SoCs. The LAN8742A specifically implements the 10/100 Mbps copper PHY only; higher-speed Gigabit (1000BASE-T) PHYs use multi-level signaling (PAM) and more pins. Key features of the LAN8742A-CZ-TR include Wake-On-LAN support for system-level sleep modes, cable diagnostics for fault detection, and flexPWR flexible power technology for low-power operation. The variable I/O voltage (1.8V-3.3V) allows direct connection to low-voltage MCUs without level shifters. The HP Auto-MDIX feature automatically detects and compensates for TX/RX pair swaps, allowing either straight-through or crossover cables to be used interchangeably. Architecturally, the LAN8742A employs DSP-based echo and crosstalk cancellation to achieve robust 100BASE-TX performance over Cat5 cable. The on-chip PHY includes an integrated termination network and uses energy detect plus power-down modes to meet modern standby-power requirements. MII and RMII MAC interfaces are selectable via strap pins, allowing the same part to be paired with virtually any MCU or SoC MAC. Typical applications include IoT gateways, industrial Ethernet nodes, embedded web servers, building automation controllers, IP cameras, and consumer electronics requiring a wired network connection. The wide 1.8V-3.3V I/O range and low power consumption also make it attractive for battery-powered Ethernet-enabled devices. When designing with the LAN8742A-CZ-TR, follow the Microchip LAN8742 QFN Routing Checklist for proper PCB layout - the analog ground plane and 50-ohm impedance-controlled differential pairs are critical for radiated emissions and signal integrity compliance. Decoupling capacitors must be placed adjacent to each power pin, and the magnetics must be specified to IEEE 802.3 isolation and return-loss specifications. This page synthesizes distributor pricing, drop-in same-BLAN alternatives, and Microchip application-note design notes not found in the manufacturer datasheet alone - giving engineers a single, decision-ready reference.

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LAN8742AI-CZ - 10/100 Ethernet PHY | Microchip Technology
LAN8742AI-CZ

LAN8742AI-CZ - 10/100 Ethernet PHY | Microchip Technology

The Microchip Technology LAN8742AI-CZ is a small-footprint RMII 10/100 Fast Ethernet transceiver with HP Auto-MDIX, cable diagnostics, Wake-on-LAN functionality, and flexPWR technology in a 24-SQFN package. It is designed for consumer, embedded, and industrial Ethernet equipment requiring a compact single-port Ethernet physical layer solution. The device supports 10BASE-T and 100BASE-TX operation, auto-negotiation, auto-polarity correction, and direct or crossover cable connections through HP Auto-MDIX. An Ethernet PHY, also called a physical-layer transceiver, converts digital data into electrical signals for transmission over twisted-pair cabling and converts received signals into data for the host controller. The LAN8742AI-CZ sits between an Ethernet transformer or magnetics and an RMII-compatible embedded host. In the hierarchy of network interfaces, it is a physical-layer IC within the Ethernet transceiver and interface-controller category. The LAN8742AI-CZ offers a 1.8 V to 3.3 V operating range, as identified for this part in the supplier listing. Its integrated low-power features and Wake-on-LAN capability suit systems that need to reduce activity during idle periods. Auto-negotiation automatically establishes the best supported speed and duplex mode, while auto-polarity correction prevents incorrect operation when cable polarity is reversed. HP Auto-MDIX removes the requirement to distinguish straight-through and crossover cables at the connector. The LAN8742AI-CZ is also described as supporting cable diagnostics, which can help embedded equipment identify wiring faults during installation or field maintenance. Its small 4 x 4 mm SQFN package supports compact PCB layouts, but the exposed pad and high-speed interface require careful thermal, grounding, and signal-integrity implementation. Microchip provides a dedicated LAN8742 QFN routing checklist that specifies connecting the exposed digital-ground pad to an internal ground plane with a 2 x 2 grid of four power vias. Typical applications include industrial Ethernet controllers, embedded Linux systems, network appliances, consumer electronics, USB-to-Ethernet equipment, and IoT gateways. The RMII interface is particularly appropriate for microcontrollers and application processors that provide a parallel Ethernet MAC interface. Selection should consider magnetics compatibility, firmware driver support, cable-diagnostic behavior, operating-temperature requirements, and the precise board-level implementation guidance. For reliable operation, follow the manufacturer datasheet for pin assignments, external component values, crystal or clock requirements, and layout clearances. Treat the exposed pad as a thermal and electrical connection rather than an unused lead. Validate the completed board for RMII timing, Ethernet magnetics integration, return-loss performance, radiated emissions, and cable insertion before production. This page combines the manufacturer part information, supplier listings, package details, interface capabilities, drop-in family options, and practical PCB guidance into a focused engineering reference. It also distinguishes confirmed electrical characteristics from parameters that still require the manufacturer datasheet for final design verification.

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LAN9115-MT - 10/100 Ethernet Controller, 3.3V | Microchip
LAN9115-MT

LAN9115-MT - 10/100 Ethernet Controller, 3.3V | Microchip

The Microchip Technology LAN9115-MT is a single-chip 10/100 Ethernet controller with a nominal 3.3 V supply, clock frequency up to 25 MHz, and a 100-pin TQFP package measuring 14 x 20 mm. It integrates an Ethernet controller and Base-T/TX PHY behind a 16-bit parallel interface for embedded systems requiring medium-performance network connectivity. The device is positioned as a cost-conscious, flexible Ethernet solution that reduces the component count compared with separate controller and physical-layer devices. An Ethernet controller is an interface IC that connects an embedded processor or programmable logic device to a physical Ethernet network. The controller manages higher-level station functions, while the integrated PHY handles the physical signaling required for 10BASE-T and 100BASE-TX links. Within the semiconductor hierarchy, this device is a network interface controller, a communications interface IC, and a system-level Ethernet connectivity component. Verified product information identifies the LAN9115 as a full-featured single-chip 10/100 Ethernet controller intended for 16-bit embedded applications. Its parallel interface supports integration with processors that use a memory-mapped bus rather than a dedicated PCI interface. The supplied distributor classification also identifies a Base-T/TX PHY, while the product description emphasizes price-performance balance for medium-performance requirements. The LAN9115 combines MAC-oriented controller functionality and physical-layer connectivity in one package. This consolidation can simplify PCB routing and reduce the number of external interface components, but the Ethernet magnetics, connector, termination, clock source, decoupling network, and firmware support remain essential parts of a working network subsystem. Its 3.3 V operation also places it in the supply domain of many embedded processors, FPGAs, and industrial controllers. Typical uses include industrial control equipment, embedded gateways, factory data acquisition, instrumentation, building automation, serial-to-Ethernet products, and compact embedded servers. The LAN9115 is most appropriate where 10/100 Ethernet is sufficient and a 16-bit host interface is preferable to a PCI-based architecture. It can also form the network foundation for supervisory systems that exchange configuration, status, and diagnostic data. Board design should reserve careful attention to the 25 MHz clock requirement, 3.3 V power distribution, PHY-to-magnetics routing, and manufacturer-recommended decoupling and layout practices. Because the verified snippets do not provide a complete timing, register, electrical-limit, or absolute-maximum specification set, designers should consult the official manufacturer datasheet before finalizing clock tolerances, impedance, magnetics selection, or software configuration. This page consolidates verified product identity, package, interface, supply, and sourcing information into a practical selection record. It also distinguishes verified facts from unavailable details rather than guessing, while directing engineers to the official datasheet and authorized distributor listings for design validation and current commercial availability.

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LAN9116-MT - 10/100 Ethernet Controller | Microchip
LAN9116-MT

LAN9116-MT - 10/100 Ethernet Controller | Microchip

Microchip LAN9116-MT is a single-chip 10/100 Ethernet controller with a parallel CPU interface for embedded systems requiring integrated network connectivity, flexible integration, and controlled system cost. It supports 10 Mbps and 100 Mbps Ethernet operation and interfaces with 16-bit or 32-bit embedded processors. The device is supplied in a 100-pin TQFP package measuring 14 x 20 mm. Its combination of an Ethernet controller, 10/100 Base-T/TX physical-layer interface, parallel host interface, and low host-CPU overhead makes it suitable for industrial controllers, embedded gateways, network management equipment, and compact connected products. An Ethernet controller is an interface IC that connects a processor or embedded system to an Ethernet network. In the hardware hierarchy, a network interface controller includes the Ethernet MAC, host-facing bus interface, and physical-layer functions required for copper Ethernet communication. The LAN9116 family combines these functions in one device, reducing the number of external interface components needed when an embedded product requires 10/100 Ethernet rather than only a lower-level transceiver. According to the Microchip LAN9116 datasheet, the controller is intended for embedded applications where performance, flexibility, integration ease, and system cost control are important. Its architecture targets 32-bit applications with medium-to-high performance requirements, while the parallel interface also supports connection to many 16-bit embedded processors. The documented 10/100 Base-T/TX capability allows a system to negotiate 10 Mbps or 100 Mbps operation, while the integrated controller architecture reduces the processing burden imposed on the host CPU. The LAN9116-MT belongs to the LAN9116 product family and is offered as a 100-pin TQFP implementation. Its parallel host interface is intended to connect with embedded processor buses rather than using the serial interfaces associated with many newer Ethernet controllers. This makes it relevant to established embedded processor platforms where a proven parallel bus, compact 14 x 20 mm package, and integrated 10/100 Ethernet function can simplify a board-level design without requiring a separate PHY. Typical applications include industrial Ethernet gateways, programmable controllers, factory automation equipment, embedded routers, print servers, set-top boxes, and network-enabled test equipment. The device is also appropriate for compact industrial control systems in which a 16-bit or 32-bit host processor needs deterministic access to Ethernet packet data. Designers should evaluate host-bus timing, magnetics selection, connector integration, and reference-circuit layout against the complete manufacturer datasheet before releasing production hardware. The primary design consideration is that the LAN9116-MT integrates substantial networking functionality around a parallel host interface. Designers should use the manufacturer reference schematic and placement checklist as the basis for routing the processor interface, supplying the required clock and reset circuitry, and placing magnetics close to the physical-layer section. Input and output constraints, crystal requirements, termination, and decoupling must be verified directly from the manufacturer datasheet rather than inferred from the distributor description. This page consolidates the verified manufacturer description, distributor package information, family comparisons, and practical selection guidance for LAN9116-MT. It also identifies where verified drop-in alternatives are not established, helping engineers distinguish documented family alternatives from unverified claims while reducing design, sourcing, and integration risk.

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LAN9117-MD - 10/100 Ethernet Controller | Microchip
LAN9117-MD

LAN9117-MD - 10/100 Ethernet Controller | Microchip

The Microchip LAN9117-MD is a high-performance, single-chip 10/100 non-PCI Ethernet controller designed for embedded systems, with a 16-bit CPU interface and integrated Ethernet controller functionality. The verified product information identifies it as a member of the LAN9118 family and emphasizes efficient interfacing with most 16-bit embedded CPUs, low CPU overhead, and suitability for medium- to high-performance applications. It is packaged as an Ethernet interface controller from the LAN9117 family; the exact package designation, pin count, voltage ratings, and full electrical limits require confirmation from the manufacturer datasheet. What is an Ethernet controller? An Ethernet controller is an integrated circuit that manages the hardware and protocol functions required for a host system to communicate over an Ethernet network. In the LAN9117-MD, the 10/100 designation refers to support for 10 Mb/s and 100 Mb/s Ethernet operation, while the non-PCI description identifies its host-side integration approach. The device is intended to reduce CPU involvement in network traffic and simplify embedded Ethernet connectivity. The most important verified feature is the 16-bit host-interface orientation. The product data states that the LAN9117 efficiently interfaces with most 16-bit embedded CPUs and uses a low-CPU-overhead architecture. It also belongs to the LAN9118 family, which provides useful context for firmware and hardware design work involving related SMSC Ethernet controllers. The product is marketed for embedded applications where performance, flexibility, ease of integration, and system-cost control are priorities. LAN9117-MD is suitable for industrial control, embedded instrumentation, network-connected test equipment, and compact embedded platforms that need 10/100 Ethernet without a PCI bus. Compared with a software-heavy network interface, a dedicated Ethernet controller can offload protocol and hardware tasks, reducing the burden placed on the host processor. The actual throughput, media interface, clock requirements, supply voltage, and electrical timing must be checked against the official datasheet before schematic capture. A key design consideration is confirming the exact package footprint and pin compatibility before substituting any part. The available migration guidance explicitly states that the LAN9211 is not a drop-in replacement for the LAN9117 because it uses a different package and requires a new PCB. This distinction is important when comparing Ethernet controllers by function rather than by mechanical interchangeability. This product page consolidates the verified LAN9117-MD role, family information, 10/100 Ethernet capability, 16-bit embedded-CPU interface, sourcing references, and migration cautions into a practical component-selection resource. Numeric electrical limits, pricing, pinout assignments, lifecycle details, and validated drop-in alternatives remain dependent on manufacturer or distributor data.

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LAN9117-MT 10/100 Ethernet Controller | Microchip
LAN9117-MT

LAN9117-MT 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9117-MT is a single-chip 10/100 Ethernet controller with an integrated Base-T/TX PHY, parallel host interface, and 100-pin TQFP package. The verified distributor listing identifies support for 10/100 Base-T/TX networking and a parallel interface. It is designed for embedded systems requiring wired Ethernet without a separate external Ethernet transceiver. An Ethernet controller is an interface IC that connects an embedded processor or programmable controller to a physical Ethernet network. Within the broader semiconductor hierarchy, the LAN9117-MT belongs to the Ethernet controller family, network interface controllers, interface ICs, and communications semiconductors. By combining controller and physical-layer functions, it can reduce component count while preserving a parallel processor-facing integration path. The verified product information identifies 10 Mbps and 100 Mbps operation, a 3.3 V supply requirement, a 100-pin TQFP package, and a single-chip architecture. The -MT ordering suffix is associated with a tray package in the available distributor record. Other detailed electrical limits, host-interface timing, register features, media-type behavior, and environmental ratings were not included in the supplied verified excerpts and therefore are not asserted here. Typical uses include embedded industrial controllers, data-acquisition systems, building-automation equipment, access-control terminals, test instruments, and compact embedded servers. A parallel host interface can suit processors and controllers that do not include an integrated Ethernet MAC, while the integrated PHY simplifies the connection between the digital host bus and the analog magnetics interface. The primary design consideration is footprint verification: the DigiKey listing describes a 100-TQFP package measuring 14 mm by 14 mm, while another distributor excerpt states 14 mm by 20 mm. Engineers must confirm the exact ordering-code drawing and land pattern against the authoritative manufacturer package documentation before layout release. The -MT suffix and tray packaging must also be confirmed with the current manufacturer datasheet. This page combines verified manufacturer and distributor descriptions with explicit engineering caveats. It does not infer unavailable electrical, timing, thermal, or compliance values, and it separates confirmed product identity from details that still require datasheet-level verification.

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LAN9118-MT 10/100 Ethernet Controller | Microchip
LAN9118-MT

LAN9118-MT 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9118-MT is a single-chip 10/100 Base-T/TX Ethernet controller with a 32-bit external parallel interface, a 3.3 V supply, and a 100-pin TQFP package. It combines an Ethernet controller and PHY for embedded systems requiring local network connectivity without a separate PCI bus controller. The device supports 10 Mbps and 100 Mbps Ethernet operation and is identified by the commercial temperature-grade -MT ordering suffix. An Ethernet controller is an interface integrated circuit that connects an embedded processor or microcontroller to a physical Ethernet network. The LAN9118 family belongs to the broader hierarchy of Ethernet controller -> network interface controller -> interface IC -> semiconductor. Integrating the controller and PHY supports embedded product designs for industrial controls, communications equipment, data acquisition, and networked peripherals, while the parallel host interface gives the host processor direct register and data access. The verified product information identifies a 32-bit external data bus, a 7-bit address bus, a 25 MHz clock capability, a 3.3 V supply, and a 100-pin TQFP package. The 100-pin package exposes the substantial parallel host interface required by the non-PCI architecture. The LAN9118-MT is therefore most appropriate where an embedded system has enough I/O and board area for a high-pin-count parallel interface rather than a compact serial Ethernet controller. The part is described as a high-performance single-chip 10/100 non-PCI Ethernet controller. Its combined controller and PHY architecture can reduce the number of external network-interface components compared with a separated MAC and physical-layer design. Ethernet magnetics and the RJ45 connector remain external, and the final signal-integrity and layout implementation must follow the manufacturer hardware guidance. The provided verification also identifies IEEE 802.3 and IEEE 802.3u compliance in a product comparison source. Typical uses include embedded Ethernet gateways, industrial monitoring equipment, serial-to-Ethernet systems, test instruments, and control systems that require 10/100 connectivity. The parallel interface makes the LAN9118-MT most attractive to designs with a processor bus capable of supporting the required data width and pin count. It is less suitable for highly constrained systems that favor a serial Ethernet interface or a smaller package. Designers should verify the complete pinout, voltage tolerances, clock requirements, decoupling, reset behavior, magnetics selection, and PCB routing against the manufacturer datasheet before layout release. The verified search results identify the manufacturer LAN9118 product page and multiple datasheet mirrors, but do not provide every electrical timing, pin-level, or lifecycle value needed for a complete production design.

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LAN91C110-PU - 10/100 Ethernet Controller | Microchip
LAN91C110-PU

LAN91C110-PU - 10/100 Ethernet Controller | Microchip

The Microchip LAN91C110-PU is a 10/100 Base-TX Fast Ethernet controller with a generic 16/32-bit host interface, packaged in a 144-pin TQFP measuring 20 mm by 20 mm. It is designed for second-generation Fast Ethernet PC Card adapters and other non-PCI connectivity products. The controller implements the Media Access Control portion of the Ethernet protocol, placing Ethernet framing and medium-access functions in a dedicated interface IC. An Ethernet controller is a semiconductor that manages frame transmission and reception between a host processor and a network medium. The LAN91C110-PU provides a hardware interface suitable for systems whose CPU or system bus is not based on PCI. By using a generic parallel host interface, it can be connected to compatible processors and bus bridges without requiring a PCI-specific interface architecture. The principal feature set includes support for 10/100 Base-T/TX networking, a selectable 16-bit or 32-bit host interface, and an integrated Ethernet MAC function. The parallel interface provides a practical connection point for embedded systems, industrial controllers, legacy computer systems, and custom communications equipment. Its 144-pin TQFP package supports the numerous digital host, clock, reset, media, and power connections required by the controller and its external physical-layer interface. The LAN91C110-PU separates network-medium handling from the host-side system bus. The MAC processes Ethernet frame activity while the generic 16/32-bit interface transfers control and data information to the host processor. This division of responsibilities is particularly useful when a system already has an established embedded bus architecture but requires standards-based 10/100 Ethernet connectivity rather than a PCI peripheral arrangement. Typical applications include Fast Ethernet PC Card adapters, embedded control systems, industrial data-acquisition equipment, legacy network upgrades, and custom host-bus designs. It can also suit embedded Linux platforms and other processor-based equipment requiring a parallel Ethernet connection. System-level clocking, physical-layer connectivity, magnetic-interface components, and host-bus timing remain part of the complete design rather than functions implied solely by the controller IC. Designers should review the manufacturer datasheet before assigning signals because the complete 144-pin assignment, operating limits, interface timing, clock requirements, and recommended external networks must be followed exactly. PCB layout should preserve the required short paths, appropriate grounding, and controlled clock and data-routing geometry. Host firmware must also initialize the controller and configure its medium-access and host-interface operation according to the manufacturer procedure. This page organizes the confirmed device identity, package information, host-interface capabilities, use cases, sourcing path, and design considerations into an engineering-focused reference. It also distinguishes the controller's documented role from the additional PHY, magnetics, firmware, and bus-interface engineering required to build a complete Ethernet-connected product.

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LAN91C111-NS - 10/100 Ethernet MAC+PHY | Microchip
LAN91C111-NS

LAN91C111-NS - 10/100 Ethernet MAC+PHY | Microchip

Microchip Technology LAN91C111-NS is a mixed-signal 10/100 Mb/s Ethernet controller integrating a Media Access Controller and Physical Layer in a 128-pin QFP package. It implements the MAC and PHY portions of the CSMA/CD protocol, supports 10 Mbps and 100 Mbps operation, and provides a parallel host interface selectable as 32-bit, 16-bit, or 8-bit. An Ethernet MAC and PHY controller is an integrated network interface for embedded equipment. The MAC manages frame handling and the CSMA/CD protocol, while the PHY connects the digital controller to a 10/100 Base-T Ethernet physical layer. Combining both functions reduces system complexity, conserves board area, and allows an embedded processor to communicate through a parallel host bus rather than requiring a separate Ethernet PHY. The LAN91C111-NS supports dual-speed operation at 100 Mbps or 10 Mbps with AutoNegotiation, as described in the manufacturer application note. Its architecture includes 8 KB of dynamically configurable transmit and receive FIFO SRAM, helping decouple host-bus traffic from network-frame activity. The parallel interface can operate at 32, 16, or 8 bits, providing flexibility for embedded processors with different external-bus capabilities. For 100BASE-TX operation, the descrambler processes the scrambled data recovered from the medium, follows the IEEE 802.3 scrambling rules, aligns the data on correct 5B word boundaries, and passes it to the 4B5B decoder. This mixed-signal architecture supports both 10BASE-T and 100BASE-TX networking while maintaining a host-facing digital interface. The manufacturer identifies the device as suitable for third-generation embedded Fast Ethernet connectivity solutions. Typical uses include industrial automation controllers, embedded network gateways, factory data-acquisition equipment, building-control systems, print servers, and compact network-access appliances. The selectable host-bus width is especially useful when balancing throughput, PCB routing, and processor-bus compatibility. AutoNegotiation allows the controller to operate with 10 Mb/s or 100 Mb/s network links while reducing manual speed configuration. Design the power, ground, clock, magnetics, and network-line interface according to the manufacturer reference implementation. Preserve the recommended placement and decoupling of the Ethernet magnetic components and provide the specified oscillator and crystal arrangement to avoid timing or compliance problems. Validate the completed board for conducted emissions, immunity, and Ethernet link performance before production. This page organizes the controller's principal network functions, interface options, package characteristics, application guidance, and qualified same-footprint alternatives. It also highlights design considerations that help engineers distinguish protocol coverage, host-bus flexibility, FIFO behavior, and physical-layer implementation without treating the device as a generic Ethernet block.

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LAN91C111-NU - 10/100 Ethernet MAC/PHY | Microchip
LAN91C111-NU

LAN91C111-NU - 10/100 Ethernet MAC/PHY | Microchip

The Microchip LAN91C111-NU is a single-chip 10/100 Base-T Ethernet controller integrating a Media Access Control layer and Physical Layer in a 128-lead TQFP package. It supports 10 Mbps and 100 Mbps operation, provides an 8/16/32-bit parallel host interface, and includes an 8 KB dynamically configurable transmit and receive FIFO. The device combines digital host-facing logic with analog PHY functions for embedded Ethernet connectivity. An Ethernet MAC and PHY are the two principal layers required for a conventional 10/100 Ethernet connection. The MAC organizes frames and manages access to the network, while the PHY converts digital data into signals suitable for twisted-pair cabling. Integrating both functions into one controller reduces external component count and simplifies embedded network designs compared with separate MAC and PHY implementations. The LAN91C111-NU belongs to the broader interface IC and Ethernet controller hierarchy. Key features include 10/100 Mbps dual-speed operation, support for 8-bit, 16-bit, and 32-bit host bus configurations, and 8 KB of internal FIFO memory. The manufacturer describes the LAN91C111 as implementing the MAC and PHY portions of CSMA/CD and using a parallel host interface suited to embedded processors. Its mixed-signal construction places network termination and transceiver functions alongside the digital controller logic. The configurable host interface allows a design to balance throughput, wiring, and memory efficiency. An 8-bit bus can reduce the number of processor connections, while a 32-bit bus can transfer data more efficiently when the host bus and system timing support it. The internal transmit and receive FIFOs help decouple host access from network timing, although firmware, interrupt handling, and buffer configuration remain essential parts of a reliable driver design. Typical applications include embedded industrial controllers, print servers, set-top boxes, embedded Linux systems, instrument-control equipment, and compact network appliances. The integrated 10/100 Ethernet interface is useful when a system needs a deterministic parallel host connection rather than a serial network interface. It can also support legacy Fast Ethernet equipment where both 10 Mbps and 100 Mbps operation are required. Layout is the primary design consideration. Place the Ethernet magnetics, line-side protection, and PHY-related components close to the network connector, while keeping the parallel host bus away from sensitive analog network traces. Confirm power, clock, reset, transceiver, and host-interface requirements against the manufacturer datasheet before releasing the PCB layout. The package library does not contain a dedicated 128-lead TQFP drawing, so use the manufacturer pin-description table for assignments. This page combines the LAN91C111-NU device function, verified family variants, cross-reference findings, application guidance, and practical integration considerations. It also distinguishes true same-package options from unrelated Ethernet controllers that may require different hosts, PHYs, packages, or driver changes.

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LAN91C113-NC 10/100 Ethernet MAC/PHY | Microchip Technology
LAN91C113-NC

LAN91C113-NC 10/100 Ethernet MAC/PHY | Microchip Technology

The Microchip Technology LAN91C113-NC is a 16-bit 10/100 Base-T Ethernet single-chip MAC and PHY controller. It combines media-access control, physical-layer signaling, and a parallel host interface in one integrated circuit, reducing the component count required for embedded Ethernet connectivity. The controller is associated with the SMSC FEAST family and is identified in the manufacturer catalog as LAN91C113. An Ethernet MAC and PHY single-chip controller is an interface IC that connects an embedded host processor to a copper Ethernet network. The MAC handles Ethernet frame processing and host-facing data exchange, while the PHY converts between digital signaling and the physical signals used on 10/100 Base-T networks. In the broader semiconductor hierarchy, the device belongs to Ethernet controllers, interface controllers, integrated circuits, and networked embedded systems. The principal feature of the LAN91C113-NC is its combination of a 16-bit parallel host interface with an integrated 10/100 Ethernet MAC and PHY. This integration can simplify embedded networking designs that previously required separate Ethernet controller and physical-layer devices. The 16-bit interface provides a direct path between the controller and a compatible host processor, while on-chip Ethernet physical-layer functionality supports connection to a network transformer and magnetics. The LAN91C113 family is associated with SMSC's FEAST Fast Ethernet controller technology. Its architecture is intended to provide Ethernet connectivity in embedded systems where a non-PCI parallel interface is preferable to a PCI-based controller. The combined MAC and PHY arrangement also reduces board-level integration complexity by consolidating the digital controller and physical-layer transceiver into one package. Typical uses for this controller include industrial embedded platforms, data acquisition equipment, communications modules, embedded test systems, and legacy controller-based products being connected to 10/100 Ethernet. It is particularly relevant when the host processor already provides a 16-bit parallel bus and the design needs a dedicated Ethernet interface rather than an integrated network controller in the processor itself. Design work should begin with the manufacturer pin-description and reference-circuit sections, including the external clock, reset, magnetics, decoupling, and network-isolation requirements. PCB signal integrity is particularly important because the device combines parallel host signaling with Ethernet physical circuitry. Maintain the specified component placement and controlled impedance around the Ethernet network path, and use the manufacturer reference design as the basis for a first revision. This product page combines the device identity, catalog description, distributor records, package guidance, application analysis, and engineering design notes into one purchasing resource. It also distinguishes direct ordering information from replacement analysis so engineers can assess fit, interface compatibility, and board-level integration before committing a design.

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LAN91C113-NS - 100Mbps Ethernet Controller | Microchip
LAN91C113-NS

LAN91C113-NS - 100Mbps Ethernet Controller | Microchip

Microchip Technology LAN91C113-NS is a 100 Mbps Ethernet controller with integrated 10/100 Base-T/TX PHY and a parallel MII interface, supplied in a 128-QFP package. The device supports a 2.97 V minimum supply voltage, operates at 3.3 V, and is specified for a 0°C to 85°C temperature range. Its integrated MAC and PHY combine Ethernet packet processing and physical-layer connectivity in one IC. An Ethernet controller is an interface integrated circuit that connects a digital processor or system bus to an Ethernet network. The LAN91C113 belongs to the Ethernet interface controller category, which combines a media access controller, physical-layer transceiver, and host-facing parallel interface. This integration can reduce the number of external network components while providing a standardized 10/100 Ethernet connection for embedded equipment. The principal operating characteristics are a 100 Mbps data rate, compliance with IEEE 802.3 and IEEE 802.3u, MII host connectivity, and a 3.3 V supply. The listed supply current is 100 mA, while the operating temperature extends from 0°C to 85°C. These specifications position the device for industrial, communications, and embedded systems that use a parallel host interface instead of a serial media interface. The 128-QFP package provides the physical footprint and pin count needed for a substantial mixed-signal Ethernet interface. Because the MAC and PHY are integrated, PCB design requires careful separation of Ethernet signal routing, supply distribution, and grounding. The parallel MII interface should be routed according to the manufacturer's recommended layout and timing guidance to limit data-integrity and electromagnetic-interference issues. Typical uses include industrial Ethernet control equipment, embedded network gateways, data acquisition systems, print servers, and communication controllers. In each case, the device serves as the link between a host processor and a 10/100 Ethernet network. Its 3.3 V operation and commercial temperature range support compact systems where 100 Mbps connectivity is sufficient and a dedicated PHY is undesirable. Designers should confirm pin functions, timing, clocking, magnetics, and decoupling directly against the manufacturer datasheet before layout release. Particular attention should be given to MII clock timing, PHY termination, analog supply routing, and the separation between Ethernet traces and sensitive digital signals. These controls are more important than raw headline speed when establishing reliable network performance. This page organizes the LAN91C113-NS specifications, sourcing information, interface context, application guidance, and same-package replacement considerations. It also identifies which technical details require confirmation from the manufacturer documentation before a new PCB is released.

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LAN91C113-NU - 10/100 Ethernet MAC/PHY | Microchip
LAN91C113-NU

LAN91C113-NU - 10/100 Ethernet MAC/PHY | Microchip

The Microchip Technology LAN91C113-NU is a 16-bit 10/100 Base-T/TX Ethernet controller that combines a non-PCI Media Independent Interface MAC and integrated PHY in a 128-pin TQFP package measuring 14 x 14 mm. It operates from a 3.3 V supply and connects a host processor through the parallel MII interface. An Ethernet MAC, or Media Access Control, manages frame transmission, reception, addressing, and access to the physical network medium. A PHY implements the physical signaling layer between the MAC and a twisted-pair cable. The LAN91C113 integrates both functions into one controller, reducing board area and external PHY count compared with a separate MAC and Ethernet transceiver design. The controller supports 10Base-T and 100Base-TX operation over a 16-bit parallel MII. This combination suits embedded systems that already have a host processor with a compatible parallel bus but do not include an Ethernet PHY. Integration can reduce board routing, connector requirements, and the number of components requiring firmware and driver support. The LAN91C113-NU belongs to the Ethernet interface IC and network interface controller hierarchy. Unlike a PCI-based Ethernet card, the parallel MII architecture connects directly to processor logic rather than a host peripheral bus. The 3.3 V operating supply is compatible with modern embedded processor systems, although the complete design must also satisfy the voltage requirements of attached memory, magnetics, and physical-layer circuitry. Typical applications include industrial monitoring equipment, building automation controllers, embedded test equipment, industrial gateways, and compact network appliances. A typical implementation places the controller and an Ethernet jack with integrated magnetics on the same PCB, connects the host processor to the MII signals, and configures the MAC and PHY through the device’s control interface. Design should begin with the manufacturer’s reference schematic and signal-integrity guidance. Route the parallel MII clock and data signals as a controlled-length group, provide the required decoupling, and follow the recommended magnetics and impedance-termination layout. Confirm that the host processor’s MII timing, voltage levels, interrupt requirements, and software driver support match the controller before committing the PCB layout. This page consolidates the product identity, package information, application guidance, comparison criteria, and practical integration considerations engineers need when evaluating the LAN91C113-NU for a 10/100 Ethernet design. Use the Request a Quote form on this page for current commercial availability, packaging, lead time, and sourcing support.

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LAN91C93I-MS - 10Mbps Ethernet Controller | Microchip
LAN91C93I-MS

LAN91C93I-MS - 10Mbps Ethernet Controller | Microchip

The Microchip Technology LAN91C93I-MS is a single-chip, non-PCI Ethernet controller with a 10 Mbps IEEE 802.3 10BASE-T PHY interface, supplied in a 100-pin QFP package measuring 14 x 20 mm. It combines an Ethernet media-access controller with a local-bus interface and is designed for embedded systems that require compact, software-compatible Ethernet connectivity. The controller operates from 3.3 V or 5 V supply rails and is available in tray packaging as LAN91C93I-MS. An Ethernet controller is an interface IC that manages frame transmission and reception between a host processor and an Ethernet physical layer. In this product hierarchy, the LAN91C93I integrates an IEEE 802.3 Ethernet MAC, a 10BASE-T PHY interface, and a local-bus host interface. This integration reduces external component count compared with a design using a separate network controller and physical-layer transceiver, while preserving a conventional processor-facing software interface. Key features include a 10 Mbps data rate, support for full-duplex switched Ethernet, and independent transmit and receive operations. The LAN91C93I architecture incorporates the local-bus functionality associated with the LAN91C92 family. The manufacturer datasheet also states that the controller is 100% software compatible with the LAN91C92, LAN91C94, and LAN91C96 in local-bus mode, which can simplify firmware migration among supported controller generations. The controller uses a local-bus architecture rather than a PCI interface, making it appropriate for embedded processors and custom bus designs that do not expose PCI host connectivity. Its integrated 10BASE-T PHY interface connects the digital Ethernet controller to a compliant network physical layer. Support for full-duplex switched Ethernet permits simultaneous sending and receiving, unlike designs restricted to half-duplex shared-network operation. Typical uses include industrial monitoring equipment, embedded test systems, legacy factory controls, serial-to-Ethernet equipment, and compact data-acquisition platforms. In these systems, the local-bus interface connects the Ethernet controller to a host processor, while the 10BASE-T PHY interface connects the board to copper Ethernet. Designers should confirm the required host-bus timing, transceiver characteristics, and electrical isolation before integrating the controller into a new design. The principal design consideration is interface compatibility. LAN91C93I is intended to maintain software compatibility with selected LAN91C92, LAN91C94, and LAN91C96 devices in local-bus mode, but software compatibility alone does not guarantee unconditional PCB interchangeability. Confirm package dimensions, pin assignments, supply sequencing, clock requirements, and transceiver characteristics in the manufacturer datasheet before releasing a replacement or respin. This page organizes the controller’s key electrical, packaging, compatibility, application, and design information into an engineering-focused reference. It also distinguishes verified drop-in candidates from broader software-compatible family members, helping procurement and design teams assess replacements with the appropriate technical checks.

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LAN91C93I-MU - 10 Mbps Ethernet Controller | Microchip | TQFP-100
LAN91C93I-MU

LAN91C93I-MU - 10 Mbps Ethernet Controller | Microchip | TQFP-100

The Microchip Technology LAN91C93I-MU is a non-PCI, single-chip 10 Mbps Ethernet controller supporting IEEE 802.3 and a 10BASE-T PHY interface in a 100-pin TQFP package measuring 14 x 14 mm. It operates from a 3.3 V supply, with some catalog listings identifying compatibility with 3.3 V and 5 V systems. The controller provides integrated local-bus networking, full-duplex switched Ethernet operation, independent transmit and receive paths, and an enhanced transmit queue for efficient packet management. Its 100-TQFP footprint supports conventional surface-mount PCB assembly rather than a legacy PC/PCI bus interface. The LAN91C93I architecture combines local-area-network controller functionality with a simple software interface and retains compatibility with the LAN91C92, LAN91C94, and LAN91C96 in local-bus mode. These characteristics make the device suitable for embedded Ethernet equipment that requires deterministic network connectivity without requiring a PCI host interface. The LAN91C93I-MU is identified by Microchip as LAN91C93I with the -MU ordering suffix and is supplied in a green 100-pin QFP package. Designed for industrial-temperature operation, the device is specified from -40°C to +85°C. A typical design uses the controller with external magnetic isolation for the Ethernet physical layer, a 3.3 V supply, a local host processor connected through the device's parallel host bus, and an RJ45 network interface. The controller supports 10BASE-T rather than 100BASE-TX, so link speed and physical-layer requirements must be matched to legacy or cost-sensitive Ethernet equipment. Because the LAN91C93I is not a PCI Ethernet peripheral, host-bus timing, address mapping, interrupt connectivity, and software driver configuration are central PCB considerations. Its integrated architecture reduces the number of external networking components while preserving a conventional microcontroller or processor interface. An Ethernet controller is an interface integrated circuit that manages frame transmission, reception, buffering, addressing, and host communication for an Ethernet network. The LAN91C93I belongs to the local-bus controller hierarchy, combining an Ethernet MAC, protocol handling, and PHY-interface logic into one device. Its IEEE 802.3 and 10BASE-T support connect it to the Ethernet physical-layer ecosystem, while full-duplex switched Ethernet capability allows transmit and receive traffic to proceed independently. This integration places the LAN91C93I between a host processor and an Ethernet transceiver, simplifying the hardware architecture compared with a solution using a discrete network controller and additional interface glue. Key device characteristics include 10 Mbps Ethernet operation, a 10BASE-T PHY interface, full-duplex switched Ethernet support, independent transmit and receive operations, and an enhanced transmit queue. The controller's local-bus mode software compatibility with the LAN91C92, LAN91C94, and LAN91C96 can simplify firmware migration when an existing product family already uses those controllers. Its non-PCI architecture also provides an important alternative for embedded systems whose processors do not expose a conventional PCI bus. The 100-TQFP package provides enough pins for the parallel host interface, control signals, memory connections, and Ethernet-related signals, but it also requires careful escape routing and multilayer-board planning. The specified -40°C to +85°C operating range suits industrial equipment where commercial-temperature components would be insufficient. Technically, the LAN91C93I combines local-area-network controller functions with an enhanced transmit queue and fully independent receive and transmit operations. The enhanced queue allows the software driver to stage packets more effectively, which is valuable in systems where network traffic must be transferred between an external processor and the Ethernet medium without blocking host execution. The PHY interface follows 10BASE-T requirements rather than 100BASE-TX, determining the external magnetics, connector, line-driver, and cable requirements of the board. Local-bus software compatibility with four related controller families reduces the amount of low-level networking code that must be rewritten, although drivers should still be checked for register, interrupt, and device-option differences. The device is manufactured in CMOS technology and is specified as a green package, supporting lead-free assembly processes where its production documentation confirms the appropriate soldering profile. Typical applications include industrial control terminals, embedded instrumentation, legacy network gateways, factory-floor controllers, and compact embedded networking modules. In each case, the controller provides a conventional Ethernet interface to a host processor while managing frames, transmit queuing, and receive activity in hardware. A 10BASE-T-only design is appropriate for legacy infrastructure, isolated point-to-point links, or equipment where 10 Mbps is sufficient and component cost matters. It may also serve as a migration interface when an established product already contains LAN91C92-, LAN91C94-, or LAN91C96-compatible software. Modern high-bandwidth gateways generally require a faster Ethernet controller, but the LAN91C93I remains useful where software continuity and local-bus integration outweigh throughput. The primary PCB design consideration is the parallel host-bus and memory-interface routing required by a 100-pin TQFP. Place decoupling capacitors close to each applicable supply pin, maintain short high-speed Ethernet paths between the controller, external PHY components, magnetics, and RJ45 connector, and provide solid ground-plane continuity under the device. Keep analog and digital return currents separated where the board stackup permits, and follow the manufacturer's recommended pinout and reference circuitry. Verify the external network interface against the 10BASE-T design requirements rather than assuming that a 100BASE-T magnetics assembly is interchangeable. This page combines manufacturer and distributor product facts with package, application, purchasing, and replacement guidance to support early design decisions. It distinguishes verified electrical and package characteristics from parameters that require confirmation in the complete manufacturer datasheet, helping engineers qualify the LAN91C93I-MU for embedded Ethernet designs before committing to a PCB layout or production release.

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LAN91C96-MS - 10/100 Ethernet Controller | Microchip
LAN91C96-MS

LAN91C96-MS - 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN91C96-MS is a single-chip 10/100 Ethernet controller with a 3.3 V supply, a 100-pin QFP package measuring 14 x 20 mm, and an operating temperature range of -40 °C to 85 °C. It integrates an Ethernet MAC, physical-layer encoding and decoding functions, packet RAM, and host-bus connectivity, reducing the component count required for embedded Ethernet designs. An Ethernet controller is an interface IC that connects an embedded host processor to a physical Ethernet network. Within the product hierarchy, the LAN91C96-MS is an Ethernet MAC and physical-layer controller, which is part of a communications interface IC and ultimately a semiconductor. It supports non-PCI systems using Local Bus, PCMCIA, or Motorola 68000 bus interfaces instead of requiring a PCI-compatible host. Key features include full-duplex switched Ethernet support, enhanced transmit queue management, integrated packet RAM, and support for AUI and twisted-pair network connections. The supplied manufacturer information identifies the LAN91C96 family as integrating most IEEE 802.3 functionality, including MAC protocol handling, physical-layer encoding and decoding, twisted-pair transceiver functions, and link-integrity testing. The controller addresses legacy embedded platforms that need Ethernet connectivity without a PCI bus. Its local-bus addressing uses A0-A9 and A15 together with active-low nREG, nCE1, nWE, and nOE signals. Word reads from odd byte addresses can return a zero value in the upper byte because that byte is a don't-care under the referenced PCMCIA attribute-memory access rule. Typical uses include legacy embedded systems, industrial controllers, compact network adapters, PC Card LAN equipment, and custom communication equipment requiring a non-PCI Ethernet interface. The manufacturer also identifies the low-profile TQFP option as suitable for mobile applications such as PC Card LAN adapters, although the verified LAN91C96-MS ordering information identifies a 100-pin QFP package. Designers should verify the exact PCB footprint, clock source, bus timing, transceiver connections, and power requirements against the manufacturer datasheet before substituting this legacy controller. The -40 °C to 85 °C specification supports industrial-temperature designs, but applications needing a wider commercial range should select a variant with the appropriate documented rating. This page consolidates verified distributor identification, manufacturer product information, datasheet details, interface features, and package data. It also separates documented facts from unresolved parameters and avoids presenting unspecified pricing, pin names, and competitor compatibility as confirmed engineering data.

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LAN91C96-MU - 10Mbps Ethernet Controller | Microchip Technology
LAN91C96-MU

LAN91C96-MU - 10Mbps Ethernet Controller | Microchip Technology

Microchip Technology LAN91C96-MU is a single-chip 10Mbps Ethernet controller with a 10BASE-T PHY, parallel host interface, MAC functions, and integrated packet RAM in a 100-pin TQFP package measuring 14 x 14 mm. The device supports 3.3 V and 5 V operation and combines Local Bus, PCMCIA, and Motorola 68000 bus interfaces in one CMOS Ethernet controller. Its integrated architecture reduces the external component count required for embedded Ethernet connectivity while providing full-duplex switched Ethernet support, enhanced transmit queue management, and 6 kB of packet RAM. An Ethernet controller is an interface IC that connects a host processor or embedded system to an Ethernet physical network. The LAN91C96 family integrates the Media Access Control layer, physical-layer interface, packet buffer, and host-bus logic. This places it in the hierarchy Ethernet controller > network interface controller > interface IC > semiconductor, making it suitable for legacy industrial, embedded, and PCMCIA equipment that cannot rely on a modern PCI Ethernet controller. The LAN91C96-MU supports 10Mbps Ethernet operation and a parallel 10BASE-T PHY interface. According to Microchip product information, the controller integrates all MAC and physical-layer functions and the packet RAM required to implement a complete Ethernet node. The datasheet also identifies support for full-duplex switched Ethernet and enhanced transmit queue management. These features are useful where the host bus architecture, rather than network throughput, is the primary system constraint. The device uses a 100-TQFP surface-mount package and supports both 3.3 V and 5 V supply conditions, allowing integration with systems using either voltage domain. Its Local Bus, PCMCIA, and Motorola 68000 interfaces provide design flexibility across embedded processor and legacy computer platforms. The manufacturer datasheet states that the LAN91C96 is pin and software compatible with the LAN91C92 and LAN91C94 in Local Bus mode, which supports incremental upgrades of qualifying legacy designs. Typical applications include embedded industrial controllers, PCMCIA Ethernet adapters, legacy Local Bus systems, Motorola 68000-based equipment, and custom network interface cards. The integrated 6 kB packet RAM can reduce host-memory traffic and buffer network packets, while full-duplex operation supports switched-network installations. Designers should verify that the host timing, transceiver connection, connector magnetics, and software driver are supported by the target system architecture. The primary design consideration is voltage and signal compatibility with the existing bus. Because the controller integrates Ethernet functions but requires an appropriate external network interface implementation, designers must follow the manufacturer reference circuitry for magnetics, termination, clocking, and decoupling. Firmware and bus-driver compatibility are equally important; an identical package does not by itself guarantee that a replacement can operate correctly in every legacy operating environment. This product data combines manufacturer documentation, distributor package information, sourcing details, and verified same-family alternatives. It also adds practical guidance for comparing the LAN91C96-MU with other LAN91C96 package and temperature designations without presenting package-only changes as separate functional technologies.

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