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LAN9210-ABZJ

LAN9210-ABZJ - 10/100 Ethernet Controller | Microchip Technology

The Microchip Technology LAN9210-ABZJ is a single-chip 10/100 Ethernet controller with an integrated MAC and PHY, a parallel host interface, and a 56-QFN 8 x 8 mm package. It supports IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX, HP Auto-MDIX, a 16-bit external data bus, a 7-bit address bus, and data rates up to 12.5 Mbps. An Ethernet controller is a semiconductor that connects an embedded processor or microcontroller to a physical Ethernet network. It combines packet processing, host-bus access, and physical-layer signaling into one device, reducing the number of discrete components required for an embedded Ethernet port. Within the product hierarchy, the LAN9210 is a 10/100 Ethernet controller, an Ethernet interface IC, and a network-connected embedded interface device. The controller includes large transmit and receive FIFOs for applications experiencing network latency or burst traffic. Its SRAM-like slave interface provides a direct connection to common 16-bit microprocessors and microcontrollers, as well as 32-bit processors that expose a 16-bit external bus. The integrated Checksum Offload Engine automatically handles protocol checksum tasks, reducing host processor overhead during Ethernet packet processing. HP Auto-MDIX allows the device to support connection polarity and crossover handling automatically. This simplifies cabling in embedded systems because the design does not require separate fixed MDI and MDI-X routing. The LAN9210-ABZJ operates from a 1.7 V to 1.9 V CMOS supply and supports parallel 16-bit data and 7-bit addressing, making it suitable for embedded platforms that cannot accommodate a high-speed serial Ethernet host interface. Typical uses include industrial control equipment, factory automation controllers, embedded gateways, network management appliances, test equipment, and compact data-acquisition systems. The integrated MAC/PHY arrangement is especially useful where board space is limited but a reliable 10/100BASE-TX connection is required. A suitable processor must provide compatible bus timing, chip-select logic, and sufficient interrupt handling for Ethernet traffic. When laying out the PCB, follow the manufacturer’s recommended QFN land pattern and thermal-pad via arrangement. The 56-QFN package includes an exposed VSS pad, so electrical and thermal grounding depend on correct pad connection and via placement. Validate signal integrity, supply decoupling, isolation requirements, and connector magnetics against the final board-level design. This page consolidates the key Ethernet features, sourcing guidance, package constraints, and practical design considerations engineers need when integrating the LAN9210-ABZJ into embedded networking equipment. Use the manufacturer datasheet for the complete register map, electrical limits, timing diagrams, and authoritative pin descriptions.

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LAN9211-ABZJ

LAN9211-ABZJ - 10/100 Ethernet Controller | Microchip Technology

The Microchip Technology LAN9211-ABZJ is a single-chip 10/100 Base-T Ethernet controller with a parallel host interface, HP Auto-MDIX support, and industrial-temperature capability. The device supports operation from 2.97 V to 3.63 V, operates at 10 Mbit/s or 100 Mbit/s, and is packaged in a 56-pin QFN measuring 8 mm by 8 mm. An Ethernet controller is an interface integrated circuit that connects an embedded host processor to a physical Ethernet network. It combines protocol processing, media access control, and physical-layer signaling into one device. The LAN9211 belongs to the hierarchy of Ethernet controller, network interface controller, interface IC, and semiconductor, reducing the component count and PCB area required for an embedded Ethernet port. The LAN9211-ABZJ provides a 16-bit parallel interface to its host system and integrates a 10/100 Ethernet PHY. HP Auto-MDIX supports automatic handling of straight-through and crossover cable connections, allowing a single RJ45 design to work with common Ethernet cabling arrangements. Its single-chip implementation is intended for embedded applications requiring compact networking with controlled system cost. The manufacturer describes the LAN9211 as a full-featured controller designed for applications where performance, flexibility, ease of integration, and system cost control are important. Its parallel host interface is suitable for processors able to transfer network data through a memory-mapped bus. Firmware and host-driver configuration remain important elements of the integration because interrupt, descriptor, and buffer-management behavior determine practical network throughput. Typical uses include industrial Ethernet equipment, embedded control systems, communications appliances, test instruments, and networked sensors. The 10/100 Mbit/s rate is appropriate for management traffic, serial-to-Ethernet equipment, factory monitoring, and legacy industrial networks. HP Auto-MDIX simplifies field installation by reducing cabling restrictions at the connector. The 56-pin QFN package makes high-density routing possible but requires careful thermal and layout work. Place the exposed ground pad on a multilayer board with a via array and provide the decoupling network shown in the manufacturer datasheet. The package suffix ABZJ identifies the ordered tray configuration, and the QFN land pattern must be designed before assembly. This product page consolidates the exact orderable MPN, core interface and packaging details, manufacturer documentation, sourcing guidance, and design cautions. It also distinguishes documented order information from replacement analysis so engineers can evaluate PCB reuse without assuming that a related Ethernet controller has identical pinout, host timing, or electrical behavior.

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LAN9215-MT

LAN9215-MT - 100Mbps Ethernet Controller | Microchip

The Microchip LAN9215-MT is a single-chip 10/100 Ethernet controller with a 100 Mbps data rate, a 16-bit parallel MII interface, and a 100-pin TQFP package measuring 14 x 14 mm. It integrates an Ethernet media-access controller, PHY, and connectivity needed for embedded network equipment. The verified distributor listing identifies it as a 10/100 Base-T/TX PHY controller using a parallel interface, while the manufacturer describes it as a flexible embedded Ethernet solution. An Ethernet controller such as the LAN9215-MT connects an embedded host interface to a physical copper network. Within the hierarchy of integrated circuits, it is an Ethernet interface controller and a networking semiconductor. Its 100 Mbps throughput targets Fast Ethernet networks, while its 16-bit MII provides a parallel connection to a host processor. Integrating the controller and PHY reduces external network-interface component count compared with a discrete MAC-and-PHY design. Verified features include support for 10 Mbps and 100 Mbps operation, HP Auto-MDIX support, driver compatibility with the preceding LAN9118 family, and footprint, register, and driver compatibility with those devices. The manufacturer datasheet states a 2.97 V to 3.63 V supply range and a maximum clock frequency of 25 MHz. A separate component listing describes a 3.3 V device and an operating range from 0°C to +70°C, consistent with the -MT commercial-temperature ordering option. The LAN9215-MT is suitable for embedded Ethernet systems that require a CPU-facing parallel interface rather than a serial SPI host interface. Typical uses include industrial controllers, embedded gateways, test equipment, communications modules, and OEM data-acquisition products. Its 16-bit host interface is particularly appropriate for microprocessors and programmable logic devices able to sustain parallel bus transactions at Ethernet timing requirements. The primary integration consideration is the Ethernet magnetics and analog network path. The manufacturer datasheet notes that supporting HP Auto-MDIX can require different magnetics and passive components plus a minor PCB change. Designers should therefore follow the manufacturer reference schematic and preserve the required layout, power, decoupling, and magnetics implementation rather than treating the controller as a standalone digital component. This page consolidates verified manufacturer and distributor information, practical integration guidance, application fit, and transparent gaps where complete electrical or pin-level data was not provided. The official LAN9215 product page and datasheet remain the controlling references for registers, timing, electrical limits, and reference design implementation as verified on 2026-10-22.

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LAN9215-MZP

LAN9215-MZP - 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9215-MZP is a single-chip 10/100 Ethernet controller with an integrated 10/100 Base-T/TX PHY, a 16-bit non-PCI parallel host interface, and a 100-ball LFBGA package. It operates from a 2.97 V to 3.63 V supply, supports an operating temperature range of 0 °C to 70 °C, and is designed for embedded systems requiring medium-performance networking with low CPU overhead. An Ethernet controller is a network interface IC that manages communication between a host processor and an Ethernet physical layer. Within the hierarchy of semiconductor interfaces, the LAN9215 combines protocol handling, media access control, physical-layer signaling, and host-bus integration. The -MZP ordering code identifies the lead-free 100-ball LFBGA package supplied in trays for commercial-temperature applications. Key features include 10/100 Base-T/TX connectivity, 16-bit non-PCI interfacing, HP Auto-MDIX support, and compatibility with the previous-generation LAN9118 family's drivers, registers, and footprint. These characteristics make the device suitable for industrial controllers, embedded data acquisition equipment, access peripherals, and compact network appliances. The 10 × 10 mm LFBGA package also supports space-constrained embedded designs. The controller consolidates the Ethernet MAC and PHY into one device, reducing external component count compared with a discrete MAC-plus-PHY implementation. Its parallel host interface is designed to connect readily with embedded processors that expose a compatible 16-bit bus. According to the manufacturer datasheet, software written for compatible LAN9118-family devices can operate with the LAN9215, supporting migration without redesigning the host driver. Typical applications include industrial Ethernet gateways, programmable controllers, factory monitoring equipment, point-of-sale systems, and embedded test instruments. The integrated Auto-MDIX function supports automatic handling of transmit and receive pair polarity, simplifying cabling in installations where link orientation may vary. Designers must still provide an appropriate Ethernet magnetics and power-network implementation according to the manufacturer guidance. PCB implementation requires careful attention to the 100-ball land pattern, power and ground distribution, PHY-side signal routing, and the 49.9 Ω transmit-termination pull-up specified in the manufacturer placement checklist. Place that pull-up close to the TPO+ ball when Auto-MDIX is enabled, or close to the magnetics when Auto-MDIX is disabled. This page combines verified manufacturer and distributor information with package-specific engineering guidance, sourcing facts, lifecycle caveats, and application-oriented design notes. It distinguishes documented characteristics from parameters that still require confirmation in the complete LAN9215 datasheet and customer design review.

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LAN9215I-MT

LAN9215I-MT - 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9215I-MT is a single-chip 10/100 Ethernet controller with an integrated 10/100 Base-T/TX PHY, a 16-bit MII interface, and a 100-pin TQFP package measuring 14 x 14 mm. It is designed for embedded systems that require Ethernet connectivity while controlling system cost and CPU overhead. The verified distributor listing identifies the device as a 10/100 Base-T/TX Ethernet controller with a parallel interface, while the manufacturer describes the LAN9215 family as a full-featured solution for embedded applications. An Ethernet controller is an interface integrated circuit that connects an embedded processor or programmable logic device to an Ethernet physical layer. In this case, the hierarchy is Ethernet controller > network interface controller > interface IC > semiconductor. Combining the controller and PHY reduces external component count, but the LAN9215I-MT still requires an Ethernet magnetics and connector implementation as well as a suitable 16-bit host bus connection. Verified features include a 16-bit MII interface, HP Auto-MDIX support, interrupt generation, 3.3 V operation with wake-up functionality, non-volatile configuration storage, and power-up or reset configuration. These capabilities suit designs requiring controlled Ethernet startup, host interrupt handling, and flexible configuration retention. The controller architecture is described as efficient, with low CPU overhead for medium-performance embedded applications. The LAN9215I-MT supports 10/100 Mb/s Ethernet connectivity, allowing equipment to participate in 10 Mb/s or 100 Mb/s networks. Its integrated controller and PHY simplify the signal chain compared with a discrete Ethernet MAC and separate PHY. The parallel MII interface remains important for embedded processors that do not include an integrated Ethernet MAC and need a conventional external data bus rather than a serial peripheral interface. Typical uses include industrial control equipment, factory automation controllers, embedded gateways, instrumentation, and network-enabled data acquisition systems. In these applications, the MII interface can connect to a host processor, the Auto-MDIX function can simplify straight-through or crossover cable handling, and configuration storage can reduce firmware initialization work. Wake-up and interrupt support also benefit systems that need controlled network activity and event-driven host processing. Designers should follow the manufacturer's TQFP placement checklist, particularly the 49.9 ohm TX termination pull-up arrangement specified for TPO+ when Auto-MDIX is enabled. Confirm the complete package pin assignment, power rails, decoupling requirements, magnetics selection, reference schematic, and PCB constraints against the manufacturer datasheet before releasing a layout. This page consolidates verified manufacturer and distributor information, transparent data gaps, drop-in replacement evidence, and application-focused design guidance. It distinguishes confirmed electrical and packaging facts from unverified details that still require validation against the official LAN9215I documentation.

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LAN9217-MT

LAN9217-MT 10/100 Ethernet Controller | Microchip Technology

The Microchip Technology LAN9217-MT is a single-chip 10/100 Ethernet controller with a 16-bit parallel MII interface, HP Auto-MDIX support, and a 100-TQFP 14 x 14 mm package. It combines an Ethernet media-access controller and physical-layer transceiver to connect embedded processors to 10BASE-T and 100BASE-TX networks. An Ethernet controller is an interface IC that manages frame processing, host access, and physical network signaling. In the product hierarchy, the LAN9217 belongs to Ethernet controllers, interface ICs, networking semiconductors, and embedded connectivity solutions. Its integrated PHY reduces external circuitry while its 16-bit MII interface supports common embedded processor buses and reduces the host-side I/O burden compared with narrower parallel interfaces. Key verified features include a nominal 1.8 V supply, commercial-grade operation up to 70 degrees Celsius, 10/100 Base-T and Base-TX support, and HP Auto-MDIX. The controller is designed for embedded systems requiring low CPU overhead, flexible integration, and controlled system cost. The 100-pin TQFP package provides the complete mixed-signal Ethernet interface while permitting standard surface-mount assembly. According to the Microchip manufacturer datasheet, the LAN9217 architecture integrates the PHY and controller functions and can interface with most 16-bit embedded CPUs. This combination makes it suitable for industrial controllers, embedded servers, network bridges, test equipment, and communications equipment that already have a parallel bus rather than an SPI Ethernet interface. Typical deployments include factory automation controllers, embedded network appliances, industrial instrumentation, serial-to-network gateways, and compact control systems. The Auto-MDIX function supports automatic pair detection, reducing installation friction where straight-through or crossover cabling may occur. Integrated 10/100 support lets the system negotiate its Ethernet rate through Auto-Negotiation rather than requiring two external physical interfaces. When integrating the LAN9217-MT, pay close attention to the complete 100-pin assignment, 16-bit MII timing, required clocks, magnetics, external component recommendations, and exposed-pad layout in the manufacturer datasheet. The verified excerpts do not provide enough information to reproduce the full reference circuit or pin names, so these implementation details should not be inferred from the interface description alone.

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LAN9218-MT

LAN9218-MT - 100Mbps 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9218-MT is a single-chip 10/100 Base-T/TX Ethernet controller with a 32-bit parallel host interface, 100 Mbps data rate, and a 100-TQFP 14 x 14 mm package. It integrates the Ethernet media access controller and physical-layer transceiver into one device for compact embedded networking designs. The verified source identifies the part as a high-performance 10/100 Ethernet controller designed around performance, flexibility, ease of integration, and system cost control. An Ethernet controller is an interface IC that connects an embedded processor or programmable logic device to a copper Ethernet network. Its MAC layer manages frame transmission and reception, while its integrated PHY handles the physical signaling required between digital circuitry and an Ethernet transformer or magnetics. This integration reduces the number of external network-interface components compared with separate MAC and PHY solutions, although external passive and magnetic components are still required by the application design. The LAN9218-MT supports 10/100 Ethernet operation and uses a parallel interface instead of a serial media-independent interface. The verified distributor result identifies the interface as 32-bit and the data rate as 100 Mbps. The device is intended for embedded systems requiring an Ethernet endpoint, including industrial controls, communications equipment, embedded servers, and connected test equipment. Its 100-TQFP package provides a high pin count for the parallel host bus, control signals, clocks, power supplies, and Ethernet physical connections. The manufacturer describes the LAN9218 family as architected for high performance and integration. The verified product page and datasheet links should be used for the complete register map, electrical limits, timing specifications, magnetic-component recommendations, Auto-MDIX behavior, reference schematic, and package drawing. Because the provided data does not include the complete manufacturer parameter table, unverified values are intentionally identified as [DATA_NEEDED] in the specifications rather than inferred. A typical implementation places the Ethernet controller between a host processor and network magnetics. The host communicates through the parallel bus, while the integrated PHY connects through transformer-center-tapped or other approved magnetic arrangements. PCB layout is important because high-speed digital signals, analog PHY signaling, power distribution, and magnetics must be separated appropriately. Microchip’s reference schematic and placement checklist are the authoritative starting points for a production layout. Designers should use the manufacturer datasheet and reference schematic to confirm pin functions, strap settings, clock requirements, termination, decoupling, and Auto-MDIX configuration. The verified cross-reference material notes that Auto-MDIX support may require changes to magnetics and surrounding passive components, and that a PCB change may be needed. Therefore, a software-compatible Ethernet controller is not automatically a hardware drop-in replacement. This page consolidates verified distributor pricing information, manufacturer documentation links, application context, and design guidance. It is intended to help engineers identify the correct LAN9218-MT, assess whether an alternative is truly pin-compatible, and move from component selection to a validated Ethernet hardware design.

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LAN9218I-MT

LAN9218I-MT - 10/100 Ethernet Controller | Microchip Technology

The Microchip Technology LAN9218I-MT is a single-chip 10/100 Base-T/TX Ethernet controller with a 32-bit parallel host interface and 100-LQFP TQFP package measuring 14 x 14 mm. Designed for embedded systems, it combines a 10/100 Ethernet PHY, controller, and packet-buffer memory in one device, supporting economical integration without a discrete network interface controller and separate Ethernet transceiver. The LAN9218I-MT also provides HP Auto-MDIX support and industrial-temperature capability. An Ethernet controller is an interface IC that connects an embedded processor or programmable controller to a wired Ethernet network. In the device hierarchy, the LAN9218I-MT belongs to the network interface controller and Ethernet interface IC class, combining a media-access-control function, physical-layer transceiver, and host-facing parallel bus. It is intended to reduce system cost while providing controlled access to Ethernet frames, status information, and packet buffers. Verified device attributes include support for 10/100 Base-T/TX operation, a 32-bit parallel interface, HP Auto-MDIX, and 16 KB of internal receive SRAM. According to the Microchip LAN9218i data sheet, the receive FIFO can hold more than 200 received packets. Automatic flow-control packet generation can reduce packet loss when the receive FIFO approaches capacity, while external wake mechanisms provide additional low-power integration options. The integrated PHY is designed for embedded applications where performance, flexibility, ease of integration, and system cost control are important. The parallel interface supports direct connection to host buses without requiring a separate serial Ethernet MAC interface. However, its 100-pin package and numerous host signals require careful PCB layout and enough board area for controlled impedance routing to the Ethernet magnetics. Typical uses include industrial control systems, embedded gateways, set-top equipment, printers, building-automation controllers, and industrial data-acquisition equipment. The device is particularly appropriate when an embedded processor requires a wired 10/100 Ethernet connection and the design team wants the PHY, MAC, packet storage, and Auto-MDIX support integrated into one component. Designers should follow the manufacturer’s reference circuit for magnetics, termination, bias resistors, decoupling, and high-speed layout. Driver compatibility and Auto-MDIX implementation must be checked against the exact LAN9218i hardware and software documentation. Although standard LAN9218 software drivers may support LAN9218i devices, the verified data sheet notes that supporting HP Auto-MDIX may require different magnetics and passive components and possibly a minor PCB change. This page consolidates verified manufacturer and distributor information, identifies the documented same-brand alternatives, distinguishes unavailable pricing and pin-mapping data, and highlights integration constraints that are easy to miss when comparing Ethernet controllers.

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LAN9220-ABZJ

LAN9220-ABZJ - 10/100 Ethernet Controller w/ PHY | Microchip

The Microchip Technology LAN9220-ABZJ is a full-featured single-chip 10/100 Ethernet controller with an integrated 10BASE-T/100BASE-TX PHY, a 16-bit parallel MII host interface, and 1.8 V / 3.3 V dual-supply operation, housed in a 56-pin QFN package with an exposed ground pad (8 x 8 mm). The -ABZJ ordering code designates the tray packing option with a 0 °C to +70 °C commercial temperature grade. An Ethernet controller is an interface IC that manages the framing, media access and error handling of an Ethernet link. In the product taxonomy the LAN9220 sits at the network interface controller (NIC) level, above the physical layer (PHY) and below the communications IC and interface IC families. Because the MAC and the PHY are integrated on one die, a host processor only needs to drive a simple parallel bus rather than wiring two separate chips with a narrow interface between them. Key features include full IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX compliance, HP Auto-MDIX automatic crossover detection, 16 KB of internal packet buffering, and a 16-bit MII interface that runs in both 8-bit and 16-bit modes. Digital and analog rails are supplied separately at 1.8 V and 3.3 V so that a 3.3 V I/O host can be bridged to 1.8 V core logic without level translation. The QFN package exposes a ground pad that must be tied to the ground plane for both heat removal and low-inductance return. Internally the device is a conventional store-and-forward MAC with a separate 10/100 PCS and analog PHY. HP Auto-MDIX removes the need for a strapping resistor that forces master or slave operation, and the twisted-pair pins swap transmit and receive roles automatically when a reversed connection is detected. The MII interface presents RXD, TXD, TX_EN, RX_DV, RX_ER, COL, CRS and management signals to the host, giving the CPU full visibility of carrier, collision and error status. Microchip documents the recommended land pattern and thermal layout in the LAN9220 datasheet and in application note AN 18.4, Migrating from the LAN9215 to the LAN9220. Typical applications include industrial control and factory automation gateways, embedded Linux and RTOS network cards, IP cameras and security equipment, set-top boxes, print servers, test instrumentation and PLC serial-to-Ethernet bridges. The parallel MII interface suits hosts with an embedded MII or RMII-capable MAC, while the integrated PHY removes the need for external magnetics, line drivers and a separate PHY chip. Design attention should be paid to exposed-pad thermal vias and the separation of analog supply pins from digital switching currents. Microchip recommends a 4 x 4 grid of vias at 60 mil spacing in the exposed pad area to connect the pad to the board ground plane, and the datasheet land pattern chapter should be followed exactly rather than approximating the footprint. Decoupling should follow the values listed in the datasheet power supply section, with the 1.8 V and 3.3 V rails each carrying local bulk and high-frequency ceramic capacitance. This page consolidates the manufacturer product information, distributor listing data, drop-in alternatives and practical layout guidance for the LAN9220-ABZJ into a single engineering reference that goes beyond a distributor catalogue entry, including the migration caveats for designers moving up from the older LAN9215 family.

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LAN9221-ABZJ

LAN9221-ABZJ - 16-Bit 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9221-ABZJ is a high-performance 16-bit non-PCI 10/100 Ethernet controller with an integrated Ethernet MAC, 10/100BASE-TX PHY, and parallel host interface, housed in a 56-QFN 8 x 8 mm package. It supports 10/100 Mb/s Ethernet operation, variable-voltage I/O, checksum offload engines, and glue-less connectivity to common 16-bit and 32-bit microprocessors and microcontrollers. An Ethernet controller is an interface integrated circuit that connects an embedded processor to a physical Ethernet network. The LAN9221 combines medium-access control, physical-layer signaling, data handling, and host-bus interfacing in one device. This places it within the interface-IC hierarchy, where it bridges embedded processing systems and wired network communication while reducing external PHY count and board complexity. The controller is designed around a high-throughput SRAM-like parallel host interface for 16-bit applications. Its integrated checksum engines can automatically generate and validate Internet or TCP/IP checksums, reducing processor overhead. The integrated 10/100BASE-TX PHY supports connection to a standard RJ45 network through the appropriate magnetics and magnetic-interface circuitry, while variable-voltage I/O allows the host-side interface to operate across a range of supply levels. Microchip describes the LAN9221 and LAN9221i as full-featured, single-chip 10/100 Ethernet controllers intended for embedded systems where performance, flexibility, ease of integration, and system-cost control are important. The architecture provides a hardware interface for processors that lack native Ethernet support, while checksum offload and integrated PHY functions reduce both firmware burden and external component count. Typical uses include industrial automation controllers, embedded gateways, serial-to-Ethernet equipment, test and measurement systems, building controls, and network-connected sensors. In these systems, the LAN9221 can sit beside a microcontroller, connect through its parallel host bus, and provide an Ethernet uplink for configuration, monitoring, telemetry, or control traffic. System designers must still provide the correct clock, memory interface, power distribution, magnetic interface, and Ethernet physical-layer implementation. PCB planning should preserve the manufacturer's recommended high-speed layout and decoupling arrangement because Ethernet signal integrity, clock jitter, controlled-impedance routing, and magnetic-component placement can affect field performance. The 56-QFN footprint also requires a thermal strategy appropriate for the final board environment. Use the pin-description and layout guidance in the manufacturer datasheet before assigning tracks or planning a replacement. This page consolidates the LAN9221-ABZJ product identity, application context, sourcing workflow, and drop-in replacement assessment. It also distinguishes functional Ethernet alternatives from true same-footprint drop-in parts, helping engineers avoid redesigns caused by interface, package, or feature mismatches.

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LAN9250/ML

LAN9250/ML - 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9250/ML is a single-chip 10/100 Ethernet controller with integrated Ethernet PHY, supporting 10 Mbps and 100 Mbps operation in a 64-pin QFN package. It is designed for embedded systems requiring flexible host connectivity, packet buffering, and controlled network integration. The verified product data identifies support for 1.8 V, 2.5 V, and 3.3 V operation, along with 8-bit or 16-bit host interfaces and SPI/SQI connectivity. An Ethernet controller is an interface IC that connects an embedded processor or microcontroller to a physical Ethernet network. It combines media-access control, packet data handling, transmit and receive buffering, and a physical-layer transceiver in one device. The LAN9250 series is intended to reduce integration effort by placing the controller and PHY together while preserving support for embedded host buses and serial interfaces. The LAN9250/ML combines 10/100 Ethernet connectivity with integrated PHY functionality. Its packet FIFOs are intended to accommodate high-latency applications, while its memory-buffer architecture optimizes packet granularity and helps reduce packet loss. The product description specifically identifies performance, flexibility, ease of integration, and system cost control as design priorities for embedded applications. Typical use cases include industrial embedded controllers, networked data-acquisition equipment, building-control systems, communications modules, and other MCU-based products that require an Ethernet port. The verified data lists an 8/16-bit interface and SPI/SQI interface options in distributor descriptions, allowing the device to fit systems using parallel or serial host connectivity. The 1.8 V, 2.5 V, and 3.3 V supply options are useful for systems with multiple embedded power domains. A key design consideration is that the Ethernet PHY and host interface still require careful PCB implementation, including adequate power distribution, controlled-impedance routing, and separation between sensitive analog and digital sections where required by the datasheet layout guidance. The verified sources identify the LAN9250 as IEEE 802.3/802.3u compliant, but detailed timing, pin-level, and electrical requirements should be confirmed against the manufacturer datasheet. This page consolidates verified manufacturer and distributor information, interface characteristics, application context, and sourcing links for LAN9250/ML engineers evaluating embedded Ethernet connectivity.

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LAN9250/PT

LAN9250/PT - 10/100 Ethernet Controller w/ PHY | Microchip | TQFP-64

The Microchip Technology LAN9250/PT is a full-featured, single-chip 10/100 Base-T/TX Ethernet controller with an integrated PHY, packaged in a 64-pin TQFP-EP (10x10 mm) with exposed thermal pad. It supports both I2C and SPI host interfaces and is designed for embedded applications requiring high throughput, low CPU overhead, and minimal external component count. An Ethernet controller is a semiconductor device that handles the data-link (MAC) and physical-layer (PHY) functions required to send and receive Ethernet frames. The LAN9250 integrates both the IEEE 802.3 10/100 MAC and the 100BASE-TX PHY in one chip, exposing a simple SPI/I2C slave interface to the host microcontroller. This eliminates the need for an external MAC, external PHY, and an Ethernet-equipped MCU, which reduces BOM cost and PCB area in industrial, building-automation, and IoT designs. The device sits in the network-interface hierarchy as: PHY -> MAC -> Ethernet controller -> communication IC -> semiconductor. Key features include large transmit and receive FIFOs to accommodate high-latency applications, an efficient memory buffer architecture that optimizes packet granularity, hardware offload features that reduce packet loss, support for HP Auto-MDIX, and built-in support for EtherCAT, Modbus TCP, and other industrial Ethernet protocols. The flexible host bus allows integration with virtually any 8/16/32-bit microcontroller without requiring an external bus interface, and on-chip termination and bias resistors reduce external component count. Typical applications include industrial control PLCs, factory automation nodes, building-automation gateways, IoT edge devices, motion controllers, EtherCAT slave controllers (when paired with a host MCU running the EtherCAT slave stack), and embedded HMI panels. The integrated PHY and small TQFP-64 footprint make it especially attractive for space-constrained designs that still need a wired industrial Ethernet port. When designing with this device, ensure the 25 MHz reference clock is stable and low-jitter, route the differential TX/RX pairs as a 100-ohm differential pair on the PCB, and place the 1.8V and 3.3V decoupling capacitors as close to the power pins as possible. The exposed thermal pad must be soldered to a ground copper pour for thermal dissipation.

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LAN9250I/ML

LAN9250I/ML - 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9250I/ML is a single-chip 10/100 Ethernet controller with an integrated Ethernet PHY, I2C and SPI host interfaces, and a 64-QFN 9 x 9 mm package. It supports 10 Mb/s and 100 Mb/s Ethernet operation and combines the controller, physical-layer transceiver, host interface, memory, and packet-processing functions in one device. An Ethernet controller is an interface IC that connects an embedded processor or microcontroller to a physical Ethernet network. Within the hierarchy of Ethernet interfaces, interface ICs, and semiconductors, the LAN9250I/ML provides a hardware interface between a host bus and a 10/100BASE-T network while reducing the need for external Ethernet components. Its integrated PHY makes it suitable for embedded systems requiring network connectivity without a discrete Ethernet transceiver. Key features include one integrated 10/100 Ethernet transceiver, simultaneous support for 10 Mb/s and 100 Mb/s data rates, and host connectivity through 8-bit or 16-bit parallel, SPI, or Quad SPI interfaces. The manufacturer datasheet also identifies a configurable host interrupt, internal FIFOs, and memories. These resources let the host receive and transmit Ethernet traffic without implementing the complete Ethernet physical layer in hardware. The LAN9250 architecture combines the Ethernet media-access controller and physical layer in one package. A parallel interface can provide higher host throughput than a serial interface when the system requires frequent packet movement. Conversely, SPI or Quad SPI reduces the number of host signal lines and can simplify connections to processors with limited parallel GPIO. Configuration of interrupt behavior and host access is handled through the device register interface. Typical applications include industrial Ethernet equipment, factory automation controllers, embedded data acquisition systems, building-automation equipment, and network-connected test products. The part is also appropriate for compact embedded platforms that require an Ethernet port but have limited board space. A host processor such as an STM32 or ATmega-class microcontroller can be paired with the LAN9250I/ML when local packet processing and application-level networking are required. Designers should verify the complete 64-QFN footprint, exposed-pad layout, decoupling requirements, clock source, and host-bus mode against the manufacturer datasheet before layout release. The industrial-temperature ordering code must also be checked against the system enclosure temperature. Because the supplied web evidence does not provide complete electrical limits or detailed pin names, those values should not be inferred from the distributor summaries. This page combines verified manufacturer and distributor data, practical interface-selection guidance, a same-package comparison, and design cautions that are not consolidated in the short catalog excerpts. It is intended to support sourcing and engineering review while clearly separating confirmed specifications from parameters that still require confirmation in the full Microchip datasheet.

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LAN9250I/PT

LAN9250I/PT - 10/100 Industrial Ethernet Controller | Microchip

The Microchip Technology LAN9250I/PT is a single-chip 10/100 Ethernet controller with integrated 10/100 Base-T/TX PHY, SPI/SQI host-interface support, and I2C configuration support, supplied in a 64-lead TQFP exposed-pad package measuring 10 x 10 mm. It is designed for embedded systems that require a compact Ethernet interface without the cost and integration burden of separate controller and PHY devices. An Ethernet controller is a semiconductor that manages frame processing and communication between an embedded host and an Ethernet physical layer. The LAN9250 combines these functions as an integrated Ethernet interface IC. Within the product hierarchy, it sits between a general-purpose microcontroller or processor and the physical copper network, providing a hardware interface for 10 Mb/s or 100 Mb/s Ethernet communications. The device supports optical-fiber connectivity, IEEE 1588 timing support, a low-power operating mode, wake-up capability, power-on reset, and programmable LED indication. Its 1.8 V, 2.5 V, and 3.3 V supply options support embedded designs using multiple logic levels. These features allow the LAN9250I/PT to serve industrial controllers, embedded network equipment, automation systems, and communication products without requiring a separate Ethernet PHY. The integrated architecture reduces the number of external interface components and provides a unified path for host communication and physical-layer signaling. The SPI/SQI interface supports integration with embedded processors, while I2C provides a separate configuration path. The internal 25 MHz reference clock and derived subsystem clocks form the timing foundation for controller, PHY, and host-interface operations. Typical uses include industrial Ethernet gateways, factory automation controllers, embedded network servers, serial-to-Ethernet equipment, building automation interfaces, and instrument controllers. The industrial temperature range of -40°C to +85°C supports applications across commercial, industrial, and extended-temperature embedded equipment where compact networking and programmable status indication are required. PCB design must account for the TQFP exposed pad, high-speed Ethernet layout requirements, suitable magnetic-component selection for copper interfaces, and the device's stated operating supply options. The exposed pad should be connected according to the manufacturer layout guidance, while differential Ethernet traces should be routed as a controlled-impedance pair with minimized disruption and appropriate via symmetry. This product page consolidates the verified manufacturer and distributor information, distinguishes the industrial-temperature ordering variant, summarizes interface and packaging constraints, and provides practical guidance for evaluating the LAN9250I/PT in embedded Ethernet designs.

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LAN9250T/ML

LAN9250T/ML - 10/100 Ethernet Controller | Microchip Technology

The Microchip Technology LAN9250T/ML is a single-chip 10/100 Base-T/TX Ethernet controller with integrated Ethernet PHY and selectable 8/16-bit, SPI, or SQI host interfaces, packaged in a 64-QFN 9 x 9 mm package. It is designed for embedded applications that require local Ethernet connectivity, flexible processor integration, and system-level cost control without a separate Ethernet controller and physical-layer transceiver. An Ethernet controller is an interface IC that manages communication between an embedded processor and a physical Ethernet network. Within the product hierarchy, the LAN9250 combines an Ethernet MAC, a 10/100 Base-T/TX PHY, host-interface logic, and network-related control functions. The verified product information identifies support for optical-fiber links, IEEE 1588, low-power operation, wake-up, power-on reset, and programmable LED indication. The device supports a 10/100 Base-T/TX Ethernet connection and offers I2C, SPI, and parallel host-interface options described by the manufacturer as 8/16-bit or SPI/SQI. This interface flexibility allows the same controller family to be used with embedded processors, microcontrollers, DSPs, and other systems with different bus requirements. Its 64-QFN 9 x 9 mm package supports compact surface-mount integration, although detailed footprint dimensions and exposed-pad requirements must be taken from the manufacturer documentation. Typical implementation uses the controller as the network interface between a host processor and an Ethernet transformer or optical-fiber interface. Digital firmware and drivers connect the selected host bus to the Ethernet MAC, while the integrated PHY handles the physical signaling layer. The low-power mode and wake-up functions can help a system reduce energy use or resume network operation according to product-specific requirements. Programmable LED indication provides a hardware indication of link or activity status. Because the LAN9250T/ML integrates the MAC and PHY, board planning must address host-bus timing, clocking, power sequencing, magnetic-interface components, controlled-impedance routing, and the exact exposed-pad land pattern. The manufacturer datasheet and its associated errata should be consulted before schematic release. Verification should include operating-voltage limits, transceiver or media-interface implementation, reset behavior, wake-up operation, IEEE 1588 support, and environmental qualification. This page consolidates the verified manufacturer and distributor information for the LAN9250T/ML, including the 10/100 Ethernet capability, available interfaces, 64-QFN package information, feature list, sourcing links, and practical selection considerations. Detailed electrical limits, timing tables, absolute maximum ratings, pin functions, and package dimensions that were not exposed by the supplied records are intentionally identified as data-needed rather than inferred.

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LAN9250T/PT

LAN9250T/PT - 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9250T/PT is a single-chip 10/100 Base-T Ethernet controller with integrated MAC and PHY functions, I2C and SPI host interfaces, jumbo-frame support, packet filtering, and Wake-on-LAN capability in a 64-pin TQFP exposed-pad package measuring 10 mm by 10 mm. It is designed for embedded systems that require a compact, integrated Ethernet interface without a separate Ethernet transceiver. An Ethernet controller is an interface IC that connects an embedded processor or programmable controller to a physical Ethernet network. The LAN9250 combines the Media Access Controller, which manages frame transmission and reception, with the physical-layer transceiver required to connect to a 10/100 Base-T network. This integration places the device within the embedded networking interface IC category and reduces external circuitry compared with a discrete MAC and PHY implementation. Key features include support for 10/100 Base-T/TX networking, an 8-bit or 16-bit SPI/SQI host interface, I2C configuration support, jumbo-frame handling, hardware packet filtering, and Wake-on-LAN. The I2C and SPI interfaces support embedded processor integration, while packet filtering helps the host ignore unnecessary traffic. Wake-on-LAN allows a connected system to respond to designated network wake events when otherwise inactive. The LAN9250 uses separate parallel host and serial host-interface options to accommodate different embedded architectures. Its integrated MAC and PHY organization allows the system processor to concentrate on application processing rather than low-level Ethernet framing and line signaling. The available verified material identifies the device as a full-featured single-chip controller intended to balance integration flexibility, performance, ease of implementation, and system cost. Typical applications include industrial Ethernet gateways, embedded control systems, test and measurement equipment, communications equipment, and networked microcontroller platforms. An industrial gateway benefits from the integrated 10/100 Ethernet interface, while an embedded controller can use the serial host interface and packet filtering to manage traffic efficiently. The same integration can simplify Wake-on-LAN-enabled remote equipment. PCB design should preserve the exposed-pad thermal and electrical requirements of the 64-pin TQFP package and follow the manufacturer's recommended power, clock, interface, and Ethernet-line layouts. Designers should confirm the complete pin assignments and reference design from the manufacturer datasheet before release because the supplied search results do not expose an authoritative pin table. This page consolidates verified distributor pricing, package and interface details, drop-in replacement evidence, application guidance, and design cautions into one engineering-focused reference. It distinguishes confirmed facts from parameters that require confirmation directly from the Microchip LAN9250 datasheet.

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LAN9250TI/ML

LAN9250TI/ML - 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9250TI/ML is a single-chip 10/100 Base-T/TX Ethernet controller with an integrated 10/100 Ethernet PHY, designed for embedded systems requiring flexible host connectivity and controlled integration cost. It supports 8-bit and 16-bit parallel host interfaces plus SPI and SQI serial connectivity, and is packaged in a 64-pin QFN measuring 9 mm by 9 mm. The device operates from a 1.8 V to 3.3 V supply range and is specified for an industrial temperature range of -40°C to 85°C. An Ethernet controller is an interface IC that connects an embedded processor or microcontroller to an Ethernet physical layer. The LAN9250TI/ML combines the Ethernet MAC, PHY, host interface, transmit and receive buffering, and interrupt support in one package. This integration reduces the number of external interface components and simplifies firmware access to Ethernet connectivity in industrial, communications, and embedded equipment. The principal interface choices provide different design tradeoffs. An 8-bit or 16-bit parallel interface can offer straightforward register access and useful throughput for microcontrollers with dedicated external bus resources. SPI or SQI uses fewer host pins and can suit systems with limited connector pins. A configurable host interrupt allows the controller to notify the processor of internal events, while the serial interface accesses system control and status registers, internal FIFOs, and memories. LAN9250TI/ML integrates the 10/100 Base-T/TX PHY with the Ethernet controller rather than requiring a separate physical-layer device for each network port. The 10/100 designation covers 10 Mbps and 100 Mbps Ethernet operation. Its 64-QFN construction supports compact embedded designs while providing numerous signal and supply connections for the parallel, serial, clock, interrupt, and Ethernet functions. Typical applications include industrial Ethernet gateways, serial-to-Ethernet equipment, programmable logic controllers, test instruments, factory automation controllers, and embedded monitoring systems. The parallel interface is particularly useful where a processor has sufficient external bus pins, while SPI or SQI reduces host pin requirements in compact connected products. The primary design consideration is host interface selection. Choose 8-bit or 16-bit operation when bus width and access speed are priorities; choose SPI or SQI when wiring density is more important. PCB layout must preserve the controller and PHY reference-network implementation, provide suitable power distribution, and route Ethernet differential pairs according to the manufacturer data sheet. This product page combines the LAN9250 family capabilities with practical interface guidance, application-specific design considerations, verified source links, and a comparison framework. It is intended to help engineers determine whether the LAN9250TI/ML architecture, package, temperature grade, and host-interface options fit an embedded Ethernet design.

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LAN9250TI/PT

LAN9250TI/PT - 10/100 Ethernet Controller | Microchip

The Microchip Technology LAN9250TI/PT is a single-chip 10/100 Ethernet controller with integrated 10BASE-T and 100BASE-TX PHY support for embedded networking systems. It provides I2C and SPI host interfaces, operates from 1.8 V, 2.5 V, or 3.3 V, and is packaged in a 64-pin TQFP exposed-pad package measuring 10 mm by 10 mm. An Ethernet controller is an interface integrated circuit that connects an embedded processor or microcontroller to a physical Ethernet network. The LAN9250 family combines a 10/100 Ethernet media-access controller, integrated transceiver, and host interface in one device. This consolidated architecture reduces external interface components, simplifies firmware integration, and supports cost-conscious embedded products where network connectivity is required. The LAN9250TI/PT supports 10 Mbps and 100 Mbps Ethernet operation and offers both I2C and SPI connectivity to its host. Its selectable 1.8 V, 2.5 V, and 3.3 V operating voltages allow integration with systems using multiple logic levels. The tape-and-reel ordering suffix identifies the production packaging, while the 64-TQFP exposed-pad construction provides a defined thermal and electrical connection through its center pad. The integrated Ethernet controller and PHY provide a compact hardware foundation for network-enabled embedded equipment. Designers can use the I2C interface when the host system favors a low-pin-count bus, or select SPI where higher transfer throughput or simpler firmware transaction handling is preferable. Configuration straps and internal registers support integration with a broader range of processor architectures rather than coupling the controller to one specific host family. Typical applications include industrial Ethernet equipment, factory automation controllers, embedded gateways, serial-to-Ethernet products, data acquisition systems, and networked sensors. The device is particularly suitable for compact embedded platforms that need 10/100 Ethernet without adding a discrete PHY. A 100BASE-FX-oriented variant is not implied by this ordering code; the identified LAN9250TI/PT supports copper Ethernet through its 10BASE-T and 100BASE-TX interfaces. PCB design should account for the exposed pad, high-speed differential pairs, magnetics, and the manufacturer’s recommended layout. Keep the Ethernet traces short, provide the specified decoupling, and follow the pin-description and layout guidance in the Microchip Technology datasheet. The exposed-pad connection also affects solder assembly and thermal performance, so its land pattern and paste volume should follow the package drawing. This product page organizes the LAN9250TI/PT electrical identity, package information, sourcing fields, and engineering guidance into one reference. It also distinguishes confirmed technical attributes from parameters that require confirmation in the full manufacturer datasheet, helping engineers plan board-level integration, interface selection, and production sourcing more efficiently.

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LAN9250TV/ML

LAN9250TV/ML - 10/100 Ethernet Controller | Microchip Technology

Microchip Technology LAN9250TV/ML is a single-chip 10/100 Base-T/TX Ethernet controller with integrated 8/16-bit SPI/SQI host interface, I2C support, and Ethernet PHY integration for embedded systems. It supports a 1.8 V to 3.3 V supply range and operates from -40 °C to 105 °C. The device is supplied in a 64-VFQFN exposed-pad package for surface-mount assembly, with the /ML suffix identifying tape-and-reel production packaging. An Ethernet controller is an interface IC that connects an embedded processor or microcontroller to a physical Ethernet network. The LAN9250 combines a 10/100 Ethernet MAC, physical-layer transceiver, host-interface logic, and network-memory access functions in one device. This integration reduces the number of external interface components required for industrial control, communications, instrumentation, and embedded networking designs. Key features include support for 10 Mbps and 100 Mbps Ethernet operation, an 8-bit or 16-bit host interface, and SPI/SQI connectivity. The verified product information identifies both I2C and SPI interfaces, a 1.8 V to 3.3 V operating-supply range, and a 64-VFQFN exposed-pad package. These characteristics make the LAN9250 suitable for systems that need deterministic embedded Ethernet access without relying on a separate Ethernet PHY. The device uses a serial host interface to exchange commands, status information, and packet data with the controlling processor. Because the LAN9250 includes the PHY, the board designer must also implement the appropriate Ethernet magnetics, connector, line-termination network, and signal-routing requirements described in the manufacturer datasheet. The exposed thermal pad provides the primary thermal-conduction path into the PCB copper and must be connected according to the package land pattern. Typical applications include industrial Ethernet controllers, programmable logic controllers, factory automation equipment, embedded instrumentation, serial-to-Ethernet gateways, and communication modules. The broad supply-voltage range allows integration with systems operating from 1.8 V, 2.5 V, or 3.3 V logic domains, provided that each rail and signal level is checked against the manufacturer requirements. A primary design consideration is PCB implementation. Place the controller, supporting decoupling, PHY-support components, and Ethernet magnetics according to the reference layout in the manufacturer datasheet. Keep high-speed Ethernet traces short, preserve the prescribed differential-impedance geometry, and provide a low-impedance ground path from the exposed pad to the ground plane. This product page combines the official LAN9250 documentation with distributor specifications, engineering application guidance, and drop-in replacement analysis. It is intended to help engineers evaluate interface capability, package implementation, thermal layout, lifecycle status, and sourcing requirements before beginning a PCB design.

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LAN9250V/ML

LAN9250V/ML - 10/100 Ethernet Controller | Microchip | 64-QFN

The Microchip Technology LAN9250V/ML is a full-featured, single-chip 10/100 Ethernet controller designed for embedded applications where performance, flexibility, ease of integration, and system-cost control are required. It integrates a 10/100 Base-T/TX Ethernet controller with an 8-bit or 16-bit SPI/SQI host interface and is available in a 64-QFN package with an exposed pad. The verified distributor listing identifies the device as an Ethernet controller with one 10/100 Base-T/TX transceiver, 10 Mb/s and 100 Mb/s operation, 1.8 V, 2.5 V, and 3.3 V supply options, and I2C and SPI interfaces. The LAN9250 family is positioned for embedded systems that need compact Ethernet connectivity without implementing separate MAC, PHY, and host-interface blocks on the board. Its support for optical fiber, IEEE 1588, low-power mode, wake-up, power-on reset, and programmable LED indication makes it useful in industrial networking, embedded control, communications equipment, and factory-automation systems. The host processor connects through the serial interface, while the Ethernet side supports copper twisted-pair links and optical-fiber-related integration described in the manufacturer and distributor information. Design selection should account for the physical 64-QFN footprint, exposed-pad thermal requirements, connector magnetics, clocking, decoupling, and the specific voltage and interface configuration used by the host platform.

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LAN9252/ML

LAN9252/ML - 2/3-Port EtherCAT Slave Controller, Dual PHY | Microchip

The Microchip LAN9252/ML is a 2/3-port EtherCAT slave controller (ESC) with dual integrated 100BASE-TX Ethernet PHYs, supplied in a 64-pin QFN (9x9 mm) package. It supports 100 Mbps full-duplex Ethernet, HP Auto-MDIX, optional 100BASE-FX fiber via an external transceiver, SPI/SQI host interfaces, 3 FMMUs, 4 SyncManagers, and a Distributed Clock mechanism. The part is targeted at cost-effective EtherCAT slave designs and operates from a 1.8 V/2.5 V/3.3 V digital core supply plus a 3.3 V analog supply. An EtherCAT slave controller (ESC) is an application-specific integrated circuit that implements the EtherCAT slave protocol entirely in hardware, exposing process data and mailbox registers to a host microcontroller over a parallel or serial Process Data Interface (PDI). Within the industrial communication stack, ESCs sit below real-time Ethernet masters and above generic MCUs; the family hierarchy is ESC -> industrial Ethernet controller -> communication IC -> semiconductor. Compared with earlier solutions such as the Beckhoff ET1100, the LAN9252 integrates the physical layer and uses a smaller QFN package, simplifying board layout and reducing BOM cost. Key features include two embedded full-duplex 100BASE-TX transceivers with HP Auto-MDIX, an SPI/SQI host interface with Digital I/O modes of up to 16 bits, support for external 100BASE-FX fiber via a fiber transceiver, on-chip 3 FMMUs and 4 SyncManagers, distributed clocking, cable diagnostics, and integrated termination resistors. The device supports 8/16-bit and 32-bit host microcontrollers and provides extensive interrupt, GPIO, and LED status resources. Architecturally, the LAN9252 combines an EtherCAT IP core (Beckhoff-licensed) with two 100 Mbps Ethernet PHYs, hardware DPRAM, FMMU/SyncManager logic, and an SPI/SQI bus bridge on a single die. Power architecture is split between a 1.8 V/2.5 V/3.3 V digital core and a 3.3 V analog PHY rail, which allows the digital host MCU to operate from lower voltages while the analog side retains high signal integrity for 100BASE-TX signaling. The QFN-64 package provides a single exposed pad (EP) that must be soldered to a low-impedance ground plane for thermal and EMI reasons. Typical applications include EtherCAT digital I/O modules, servo/stepper drives, encoder feedback, robotics and CNC peripherals, sensor/actuator hubs, and industrial motor controllers that need deterministic real-time Ethernet communications. Designers usually pair the LAN9252 with a small Cortex-M-class MCU that runs the application firmware and reads/writes the process image through the LAN9252's SPI/SQI registers. When designing with the LAN9252, follow Microchip's LAN9252 Schematic Checklist closely: place the 49.9 ohm 1% pull-up on TXPA/TXPB to VDD33TXRX1, use a 25 MHz reference clock, place the magnetics close to the PHY pins, and provide an EEPROM for configuration. The 64-pin QFN exposed pad must be soldered to a continuous ground copper pour to meet thermal and EMI performance, and the SPI/SQI mode strap must be selected correctly at reset. This page synthesizes real distributor pricing, drop-in pin-compatible alternatives from the same Microchip LAN92xx family, and practical design notes distilled from the LAN9252 Schematic Checklist - content not bundled together in the manufacturer datasheet alone.

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LAN9252/PT

LAN9252/PT - 2/3-Port EtherCAT Controller | Microchip

The Microchip Technology LAN9252/PT is a 2/3-port EtherCAT slave controller with two integrated 10/100 Ethernet PHYs, 100 Mbps 100BASE-TX support, SPI interface capability, and a 64-pin TQFP exposed-pad package. The LAN9252/PT combines EtherCAT device-controller functions and copper Ethernet physical layers in one device, reducing the component count required for industrial network equipment. An EtherCAT slave controller, or ESC, is a specialized communications semiconductor that manages EtherCAT frames and transfers process data between an EtherCAT network and an embedded controller. In the broader hierarchy, the LAN9252/PT belongs to network and industrial interface integrated circuits: it combines a digital EtherCAT controller, full-duplex Ethernet PHYs, a host-side SPI interface, and local data-management functions. The integrated PHYs also provide HP Auto-MDIX, allowing direct-connect or crossover cables, while 100BASE-FX operation is supported through an external fiber transceiver. Verified device features include two or three EtherCAT ports, dual integrated Ethernet PHYs, full-duplex 100BASE-TX operation at 100 Mbps, HP Auto-MDIX, and support for an SPI host interface. The exact electrical ratings, memory configuration, temperature limits, timing values, and pin-level functions must be confirmed in the Microchip manufacturer datasheet before layout or firmware development. The LAN9252/PT is suited to EtherCAT servo drives, I/O modules, industrial automation controllers, motion-control equipment, and distributed factory-control systems. Its two integrated PHYs let a three-port EtherCAT device pass network traffic through its integrated ports; two-port operation is also possible. Copper Ethernet uses the integrated transceivers, whereas fiber links require an external 100BASE-FX transceiver. PCB implementation requires careful separation between digital interfaces and analog Ethernet circuitry, compliant Ethernet magnetics, controlled impedance routing, solid return paths, and thermal management of the exposed pad. Firmware must also implement the required EtherCAT state machine, device profile, process-data mapping, and host-interface behavior rather than treating the controller as a generic Ethernet switch. This product page consolidates the verified manufacturer description, distributor packaging information, pricing context, available migration guidance, and practical integration constraints. It also distinguishes true drop-in interchangeability from broader Ethernet alternatives that do not preserve the LAN9252 EtherCAT architecture.

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LAN9252I/ML

LAN9252I/ML - 2/3-Port EtherCAT Controller | Microchip

Microchip Technology LAN9252I/ML is a 2/3-port EtherCAT slave controller with two integrated Ethernet PHYs, each containing a full-duplex 100BASE-TX transceiver, and it is supplied in a 64-QFN 9 x 9 mm package. The device supports 10/100 Mb/s Ethernet operation, 100BASE-FX through an external fiber transceiver, and HP Auto-MDIX for direct or crossover cabling. An EtherCAT device controller, or ESC, is a specialized interface IC that connects an embedded control system to an EtherCAT network. Within the hierarchy of EtherCAT slave controllers, network interface controllers, communication ICs, and semiconductors, the LAN9252 combines Ethernet physical-layer transceivers with EtherCAT protocol and host-interface functions. Its synchronous device SPI/SQI interface allows an external microcontroller or processor to access controller resources. The principal feature set includes two integrated 100BASE-TX PHYs, support for 100BASE-FX through an external fiber transceiver, 10/100 Mb/s data rates, and HP Auto-MIDX cabling support. Digital I/O operation also allows selected EtherCAT signals to be controlled or monitored directly by an EtherCAT master. These features make the device suitable for industrial automation equipment where EtherCAT connectivity must coexist with embedded processing. The controller is intended for 1.8 V, 2.5 V, and 3.3 V operation, as identified in the supplied component listings. Its 64-QFN construction supports compact industrial designs, although exposed-pad layout and multilayer PCB construction are important for reliable performance. The I ordering code identifies the industrial-temperature device variant, while the exact ordering suffix, package markings, and absolute maximum ratings must be confirmed in the manufacturer datasheet before release. Typical applications include EtherCAT servo drives, programmable logic controllers, industrial I/O modules, motion-control equipment, and factory-automation controllers. A copper-only installation can use the integrated PHYs directly, while a fiber-based installation can add an external 100BASE-FX transceiver. This page also compares package and ordering variants, records verified sourcing links, and highlights design checks that are not apparent from a distributor category listing alone.

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LAN9252I/PT

LAN9252I/PT - 2/3-Port EtherCAT Controller | Microchip

The Microchip LAN9252I/PT is a 2/3-port EtherCAT slave controller with dual integrated 10/100 Ethernet PHYs, 100BASE-TX operation, and a 64-pin TQFP exposed-pad package. It supports a synchronous device SPI/SQI host interface, HP Auto-MDIX, digital I/O mode, and an external fiber transceiver for 100BASE-FX. The controller includes 4K bytes of dual-port memory and three Fieldbus Memory Management Units for EtherCAT communication. An EtherCAT slave controller, or ESC, is a semiconductor that connects an embedded controller or industrial I/O module to an EtherCAT segment. The ESC processes EtherCAT frames, manages distributed clocks, provides dual-port memory for the host application, and controls network ports through integrated Ethernet PHYs. The LAN9252I/PT therefore combines an EtherCAT communication engine, two 100Mbps Ethernet physical layers, and host-side control in one device. The LAN9252 family supports full-duplex 100BASE-TX on both integrated Ethernet ports and HP Auto-MDIX, allowing direct-connect or crossover Ethernet cables. The SPI/SQI interface connects the ESC to an MCU or embedded processor, while digital I/O mode lets EtherCAT-master-controlled signals be monitored or driven through the device. The external-transceiver path also supports 100BASE-FX when fiber connectivity is required. The 64-TQFP-EP package provides a 10 mm by 10 mm land pattern with an exposed thermal pad. The /PT ordering suffix identifies the tray package option, while the I variant identifies the industrial temperature grade. Designers should confirm the exact electrical limits, pin names, timing values, recommended magnetics, and decoupling values against the manufacturer datasheet before releasing a PCB layout. Typical applications include distributed I/O modules, servo and motion-control nodes, PLC interfaces, industrial Ethernet gateways, robot control systems, and EtherCAT fieldbus equipment. The integrated PHYs reduce external Ethernet PHY count, while the ESC resources allow a host processor to exchange process data and mailbox information with the EtherCAT master. PCB implementation must preserve the package footprint and exposed-pad land pattern, provide adequate power and ground planes, route differential Ethernet pairs according to the datasheet guidance, and place magnetic-interface and decoupling components close to their associated pins. Verify isolation, magnetics, termination, and cable requirements for the target industrial installation. This page consolidates the verified manufacturer and distributor information, package and interface details, sourcing context, and design guidance for engineers evaluating the LAN9252I/PT. It is intended to accelerate BOM review and board-level planning while leaving unverified electrical parameters explicitly marked for confirmation against the manufacturer datasheet.

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