Interface ICs
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Products (3,400+)
LAN9252V/ML - 2/3-Port EtherCAT Controller | Microchip
The Microchip Technology LAN9252V/ML is a 2/3-port EtherCAT slave controller with dual integrated Ethernet PHYs, each containing a full-duplex 100BASE-TX transceiver operating at 100Mbps, in a 64-QFN 9x9 mm package. The device provides a synchronous device SPI/SQI interface for communication with a host microcontroller and supports Digital I/O Mode for signal monitoring and control by an EtherCAT master. Its two integrated PHYs support HP Auto-MDIX, allowing direct-connect or crossover Ethernet cables, while 100BASE-FX can be implemented with an external fiber transceiver. An EtherCAT slave controller is an industrial communication integrated circuit that manages EtherCAT slave-side processing and interfaces a device to an EtherCAT network. The LAN9252 belongs to the broader hierarchy of EtherCAT controller, industrial Ethernet interface, network interface controller, interface IC, and semiconductor. Integrating the Ethernet PHYs with the EtherCAT controller reduces the external component count compared with a discrete PHY implementation and provides a defined interface between the EtherCAT network and the embedded control system. Key verified features include support for two or three EtherCAT ports, two integrated full-duplex 100BASE-TX PHYs, 100Mbps operation, HP Auto-MDIX, a synchronous SPI/SQI host interface, Digital I/O Mode, and support for 100BASE-FX through an external fiber transceiver. The 64-QFN package is identified by the verified distributor listings as a 9x9 mm surface-mount package. The LAN9252V/ML uses two integrated Ethernet PHYs to support copper-based 100BASE-TX links and can also participate in fiber-based networks when the required external transceiver is added. Its architecture is intended for industrial EtherCAT slave equipment in which network connectivity, deterministic EtherCAT processing, and host-controller integration must coexist within a compact embedded design. Typical applications include industrial automation, motion-control equipment, factory I/O modules, robotics, PLC interfaces, and industrial Ethernet gateways. The LAN9252V/ML can connect embedded control electronics to EtherCAT infrastructure through 100BASE-TX while exchanging register and control data with a host MCU over the synchronous SPI/SQI interface. Digital I/O Mode provides an additional mechanism for the EtherCAT master to control or monitor device signals. When designing around the LAN9252V/ML, verify the exact board layout, exposed-pad requirements, clocking, transceiver connections, and Digital I/O signal assignments against the manufacturer datasheet before release. The LAN9252V/ML is not a general-purpose Ethernet switch; its primary role is EtherCAT slave-controller connectivity. For 100BASE-FX implementations, include the external fiber transceiver and its associated isolation, interface, and layout requirements in the system design.
LAN9253-I/R4X - 3-Port EtherCAT ESC | Microchip
The Microchip Technology LAN9253-I/R4X is a three-port EtherCAT slave controller with two integrated 100BASE-TX Ethernet PHYs, an 8/16-bit host bus interface, and support for 100 Mbps operation in a 64-QFN package. It also provides eight Fieldbus Memory Management Units, eight SyncManagers, SPI, GPIO, MII, wake-up, interrupt, and non-volatile configuration functions. An EtherCAT slave controller is a specialized interface IC that connects an embedded control system to an EtherCAT real-time industrial Ethernet network. It processes EtherCAT frames, manages distributed device memories, synchronizes distributed clocks, and exchanges cyclic application data with a host processor. Within the product hierarchy, it is an EtherCAT device controller, a network interface controller, an interface IC, and a semiconductor. The LAN9253 combines two integrated full-duplex 100BASE-TX transceivers with a flexible third-port arrangement. HP Auto-MDIX allows direct-connect or crossover Ethernet cables, reducing cabling constraints in industrial installations. The 8/16-bit host bus can connect to common embedded processors without external interface logic, while SPI, GPIO, and MII options broaden the supported hardware architectures and board configurations. Eight Fieldbus Memory Management Units support partitioned process-data access, and eight SyncManagers provide dedicated channels for cyclic data, acknowledged transfers, interrupts, and mailbox communication. The controller includes power-up and reset configuration, wake-up support, interrupt generation, and non-volatile configuration storage, reducing the amount of external initialization required in an EtherCAT slave design. Typical uses include servo and stepper motor drives, industrial I/O modules, PLC peripherals, robotics controllers, machine vision equipment, and distributed automation nodes. The integrated PHYs are particularly useful when board area or external PHY count is constrained, while the optional MII interface allows an external PHY to support the third network connection. PCB implementation requires careful separation between Ethernet and digital interfaces, correct magnetic-component layout, solid power and ground planes, and decoupling close to the device. The manufacturer’s LAN9253 hardware design checklist should be used during schematic and layout review, especially for differential pairs, clock sources, reset sequencing, and connector-related isolation requirements. This product overview consolidates the controller architecture, interface options, application guidance, practical hardware considerations, and qualified same-package alternatives. It also distinguishes the exact LAN9253-I/R4X ordering code from related LAN9253 variants so engineers can confirm temperature grade, package, and configuration before committing a PCB or production BOM.
LAN9253-V/R4X - 2/3-Port EtherCAT Slave Controller | Microchip
The Microchip Technology LAN9253-V/R4X is a 2/3-port EtherCAT slave controller (ESC) with two integrated 100BASE-TX Ethernet PHYs, a 1.20 V nominal core supply operating from 1.14 V to 1.26 V, and a 3.3 V I/O rail, housed in a 64-QFN (9x9 mm) surface-mount package. An EtherCAT slave controller, also called an ESC, is the real-time protocol engine that decodes EtherCAT datagrams, manages distributed clocks, and drives the cyclic process data exchange on an EtherCAT segment. The LAN9253 sits between the fieldbus network and the application microcontroller, and integrates the EtherCAT protocol stack, the physical layer, and the host interface into one device. In system hierarchy it is a network controller, an interface IC, and ultimately a power management and connectivity semiconductor for industrial automation equipment. Differentiating features include HP Auto-MDIX, which allows direct or crossover cables without manual crossover wiring, and full-duplex 100 Mbps 100BASE-TX operation on both integrated PHYs. The device exposes four serial I/O channels with NRZI encoding at up to 12.5 Mbps, plus I2C and SPI host interfaces, and supports 8-bit or 16-bit parallel host buses, GPIO, and MII. The industrial temperature range runs from -40 °C to +105 °C, and the device is manufactured on a CMOS process. The third port is configurable as an MII port that can be connected to an external PHY, allowing a two-port or three-port device in one design. Host communication uses an SRAM-like client interface that gives a glueless connection to most 8-bit and 16-bit microcontrollers as well as 32-bit devices, as described in the Microchip connectivity options application note AN3762. The LAN9253 hardware design checklist document 00003644B covers the supported host bus, GPIO, SPI, and MII configuration options and strap-based setup. Typical applications include servo drive and inverter control, industrial I/O modules, robot joints, motion controllers, and machine vision systems that need deterministic EtherCAT cyclic communication with the controller mounted close to the actuator. When designing around this device, follow the Microchip LAN9253 hardware design checklist for strap resistors, core and I/O decoupling, and the differential PHY layout, and use the LAN9252 to LAN9253 and LAN9254 migration guide AN3621 to confirm pin and strap differences before porting an existing board. This page consolidates distributor availability, same-family drop-in ordering options, package details, and practical design notes that are not laid out in a single place in the manufacturer documentation.
LAN9253/R4X - 2/3-Port EtherCAT Controller | Microchip Technology
The Microchip Technology LAN9253/R4X is a 2/3-port EtherCAT device controller (ESC) with dual integrated Ethernet PHYs, each supporting full-duplex 100BASE-TX operation at 100 Mbps, in a 64-QFN 9x9 mm package. It provides a compact interface between an embedded EtherCAT slave and its industrial Ethernet network, reducing the need for discrete Ethernet PHY components. The LAN9253 supports 8/16-bit host-bus operation, GPIO, SPI, and MII interfaces, making it suitable for embedded controllers that need deterministic EtherCAT connectivity. The LAN9253 belongs to the EtherCAT device-controller hierarchy, where an ESC implements the EtherCAT slave-side protocol functions and interfaces the application processor or fieldbus controller to the network. Its integrated PHYs provide two 100BASE-TX ports, while the additional MII port can support a third-port configuration when connected to an external PHY. HP Auto-MDIX enables direct-connect and crossover cable support, simplifying industrial cabling and reducing installation errors. Key features include eight Fieldbus Memory Management Units (FMMUs), eight SyncManagers, integrated dual Ethernet PHYs, configurable process-data interfaces, wake-up functionality, power-up/reset configuration, non-volatile configuration storage, and interrupt generation. The verified product data identifies the LAN9253/R4X as a 2/3-port EtherCAT slave controller with integrated Ethernet PHYs, while the manufacturer documentation also supports 8/16-bit host-bus, GPIO, SPI, and MII configurations. The controller is intended for industrial automation, motion control, robotics, PLC peripherals, and distributed machine-control systems. Its integrated 100BASE-TX PHYs are useful where deterministic EtherCAT communication and compact board construction are more important than 1 GbE throughput. The 64-QFN package also requires careful exposed-pad thermal design and high-quality PCB layout. Designers should use the manufacturer LAN9253 Hardware Design Checklist and the device datasheet for pin assignment, power sequencing, magnetic-interface layout, and configuration-strap requirements. Decoupling, impedance-controlled differential pairs, grounding, and exposed-pad thermal management are essential for reliable industrial deployments. This product page combines verified manufacturer and distributor information, practical design guidance, and a structured comparison framework. It identifies the LAN9253/R4X as a compact EtherCAT controller for embedded industrial Ethernet designs while clearly separating confirmed specifications from parameters that require additional device data.
LAN9253T-I/R4X 3-Port EtherCAT Controller | Microchip
Microchip Technology LAN9253T-I/R4X is a 3-port EtherCAT Slave Controller with two integrated 100BASE-TX Ethernet PHYs, 8 Fieldbus Memory Management Units, and 8 SyncManagers in a 64-pin QFN package measuring 9 x 9 mm. The controller supports 100 Mbps full-duplex Ethernet operation, HP Auto-MDIX, and a 1.8 V to 3.3 V variable core supply range. An EtherCAT Slave Controller, or ESC, is a semiconductor that manages cyclic industrial Ethernet communication between a controller and fieldbus devices. The LAN9253 combines EtherCAT protocol processing, dual Ethernet physical layers, host-interface logic, and synchronization resources in one device. This integration reduces component count in servo drives, I/O modules, robotics controllers, and other EtherCAT slave equipment while supporting a compact 9 x 9 mm industrial package. The principal features include support for two or three EtherCAT ports, two integrated Ethernet PHYs with full-duplex 100BASE-TX operation, HP Auto-MDIX for direct and crossover cable connections, 8 Fieldbus Memory Management Units, and 8 SyncManagers. The integrated PHYs connect the device to an EtherCAT network without requiring separate Ethernet transceiver components. Eight FMMUs organize process-data and mailbox transfer, while the eight SyncManagers support coordinated exchange of outputs, inputs, and synchronization events. The LAN9253 family is designed for embedded EtherCAT devices using 8-bit or 16-bit host buses, with additional support for 32-bit embedded controllers through its 8-bit or 16-bit bus interface. Its integrated network interface and protocol resources make it a practical single-chip solution for compact EtherCAT nodes. The operating architecture allows industrial network traffic to be handled alongside deterministic cyclic data exchange and distributed clock synchronization. Typical applications include EtherCAT servo amplifiers, distributed I/O modules, motion-control equipment, industrial robotics, machine vision, PLC expansion modules, and embedded control systems. The two integrated PHYs are especially useful where a slave device requires one upstream network connection and one downstream daisy-chain port. Systems requiring additional ports can connect the external-port resources to compatible Ethernet interface hardware according to the manufacturer hardware design guidance. PCB implementation requires careful attention to the exposed thermal pad, mixed-signal supply distribution, high-speed Ethernet differential routing, and the host-bus layout. Keep the Ethernet pairs impedance-controlled and routed as short as practical, provide the required bypass capacitance at the supply pins, and use solid ground-plane continuity beneath the QFN. The exposed pad must be connected to the appropriate ground plane and thermal-via structure specified by the manufacturer design guidance. This page consolidates the confirmed LAN9253 capabilities, practical PCB considerations, sourcing guidance, and same-footprint family alternatives. For a new PCB, treat the manufacturer datasheet and reference design as the controlling sources for pin assignment, electrical limits, layout geometry, and complete operating conditions.
LAN9253T-V/R4X 3-Port EtherCAT Controller | Microchip
Microchip LAN9253T-V/R4X is a 2/3-port EtherCAT slave controller with two integrated 100BASE-TX Ethernet PHYs, eight Fieldbus Memory Management Units, eight SyncManagers, and a 64-QFN 9 x 9 mm package. It supports 100 Mbps full-duplex Ethernet operation, HP Auto-MDIX, and a 1.8 V to 3.3 V variable-voltage operating range for embedded EtherCAT equipment. An EtherCAT slave controller, or ESC, is the real-time Ethernet interface that manages distributed device I/O, process-data communication, synchronization, and diagnostic information within an EtherCAT segment. The LAN9253 belongs to the EtherCAT device-controller category and combines the communication controller, dual Ethernet physical layers, host-interface logic, and synchronization resources in one integrated circuit. This integration reduces board complexity compared with a discrete Ethernet implementation and supports direct connection to 8-bit, 16-bit, or 32-bit embedded controllers. The two integrated PHYs provide independent full-duplex 100BASE-TX connections, while HP Auto-MDIX allows either straight-through or crossover cabling. Eight FMMUs provide eight dedicated process-data channels for EtherCAT communication, and eight SyncManagers organize cyclic and non-cyclic data exchange. These resources make the controller suitable for gateways, I/O modules, motion-control equipment, and compact industrial EtherCAT nodes. The LAN9253T-V/R4X accepts a 1.8 V to 3.3 V variable-voltage operating range, allowing it to operate alongside modern embedded processors using multiple supply domains. Its 64-lead square QFN package has a 9 x 9 mm footprint. The -V ordering suffix and R4X package code identify the exact ordering configuration and must be retained when comparing this part with other LAN9253 variants. Typical applications include EtherCAT I/O modules, industrial communication gateways, servo-drive interfaces, embedded controller interfaces, and factory-automation equipment. The LAN9253 product family is particularly relevant where two Ethernet ports are needed to form a line or ring topology without adding external PHYs. The integrated 100 Mbps PHYs simplify the physical Ethernet layer while the ESC resources handle EtherCAT-specific data movement. A robust design must follow the manufacturer’s pin-description table, power-supply recommendations, and reference layout. Place decoupling capacitors close to the relevant supply pins, route differential Ethernet pairs as controlled-impedance pairs, and provide the external magnetics and connector structure required by the chosen network interface. Confirm the exposed-pad connection and reflow requirements against the manufacturer datasheet before releasing the PCB footprint. This product page consolidates the confirmed LAN9253T-V/R4X capabilities, ordering identifiers, package information, and same-family alternatives into a design-oriented reference. It also distinguishes verified drop-in candidates from unsupported substitutions and highlights the interface, synchronization, and layout decisions that matter most when creating a production EtherCAT slave design.
LAN9253T/R4X - 3-Port EtherCAT Slave Controller | Microchip
The Microchip Technology LAN9253T/R4X is a 2/3-port EtherCAT slave controller (ESC) with dual integrated 100BASE-TX Ethernet PHYs, packaged in a 64-pin QFN (9x9 mm) with exposed pad. It provides eight Fieldbus Memory Management Units (FMMUs), eight SyncManagers, a parallel host interface supporting 8-bit and 16-bit embedded controllers as well as 32-bit embedded controllers with an 8/16-bit bus, and HP Auto-MDIX support for direct or crossover cabling. An EtherCAT slave controller is a dedicated network-on-chip that manages the cyclic process data exchange of one EtherCAT segment node. It sits between the EtherCAT physical layer and the embedded application controller: the on-chip PHYs handle the differential 100BASE-TX line coding, while the ESC's FMMUs and SyncManagers buffer and time the distributed clocks and process data so the host MCU sees a simple register interface. In the device hierarchy it belongs to the family of industrial Ethernet interface ICs, below EtherCAT ESC, below industrial Ethernet controller, below network interface controller. Key features of this device include full-duplex 100 Mbps 100BASE-TX operation on both ports, HP Auto-MDIX crossover handling, variable core voltage operation from 1.8 V to 3.3 V for direct connection to modern 1.8 V microcontrollers, distributed clock support with eight FMMUs, and eight SyncManagers for deterministic data exchange. The 64-QFN package keeps the industrial node design compact and low-profile while exposing a large thermal pad for reliable dissipation. Architecturally, the LAN9253 integrates the PHY, the ESC digital core, and the host interface into a single silicon device, removing the need for a separate Ethernet PHY and reducing board area and assembly cost. The parallel host interface lets the device attach to 8-bit, 16-bit, or 32-bit microcontroller buses without an external SPI-to-parallel bridge. Typical applications include servo motor drives, robot joints, industrial I/O modules, PLC interface cards, CNC machine tool controllers, decentralized motion controllers, and EtherCAT junction or line-extender modules. The main design consideration is the host-bus timing budget: the parallel interface is synchronous and must be clocked by the host MCU, so the MCU must service EtherCAT interrupts promptly and the reference clock must meet the distributed-clock jitter budget. Keep the 1.8 V/3.3 V supply rails decoupled locally and route the differential pairs as a controlled-impedance pair. This page adds engineering value that a distributor listing does not: a consolidated technical description, drop-in alternatives in the same 64-QFN footprint, a parameter-by-parameter comparison table, and practical PCB, layout, and clocking notes derived from the manufacturer documentation for the LAN9253 family.
LAN9254-I/JRX - 3-Port EtherCAT Controller | Microchip
Microchip Technology LAN9254-I/JRX is a 3-port EtherCAT device controller with two integrated 100BASE-TX Ethernet PHYs, 32 digital I/Os, and operation from 1.8 V to 3.3 V in an 80-pin TQFP exposed-pad package measuring 12 mm by 12 mm. It supports full-duplex 100 Mbit/s Ethernet, HP Auto-MDIX, Distributed Clocks, and industrial real-time communications. An EtherCAT device controller, or ESC, is a specialized interface IC that connects an EtherCAT master and distributed automation equipment to an embedded application processor. Within the product hierarchy, the LAN9254-I/JRX is an EtherCAT controller, a network interface controller, and an industrial Ethernet interface IC. Integrating two Ethernet PHYs into the controller reduces the number of external network components required by a multi-port EtherCAT slave design. The LAN9254-I/JRX provides three EtherCAT ports, two integrated full-duplex 100BASE-TX transceivers, and 32 digital I/Os. HP Auto-MDIX allows direct or crossover LAN cable connections without manually assigning transmit and receive pairs. The 1.8 V to 3.3 V operating range supports integration between low-voltage digital logic and industrial communication networks, while the exposed-pad package supports heat transfer from the controller. Its integrated EtherCAT functionality is designed for deterministic industrial communication. Distributed Clocks support synchronized real-time networks, while the two independent Ethernet channels support line and ring topologies common in industrial automation. The controller also includes wake-up functionality, power-up and reset configuration, non-volatile configuration storage, and interrupt generation for coordinated host-processor communication. Typical uses include EtherCAT servo drives, programmable logic controllers, industrial I/O modules, motion controllers, robotics equipment, and factory automation gateways. The 32 digital I/Os can expose application-level status, enables, faults, and digital signals without requiring a separate large I/O expander. Integrated PHYs also simplify board routing while retaining dedicated Ethernet connectivity for downstream EtherCAT ports. For a new design, follow the LAN9254 Hardware Design Checklist and the pin-description table in the manufacturer datasheet when assigning the 80-pin footprint. Check power sequencing, exposed-pad connection, configuration straps, PHY magnetics, termination, and layout against the hardware checklist before fabrication. The checklist specifically calls for verifying every pin against the datasheet and the 80-pin TQFP shape. This page organizes the controller's Ethernet, EtherCAT, digital I/O, packaging, and sourcing information while adding practical design guidance. It also distinguishes the temperature-grade and packaging variants that engineers encounter when planning a second-source or lifecycle strategy.
LAN9254-V/JRX - 3-Port EtherCAT ESC | Microchip
The Microchip Technology LAN9254-V/JRX is a 3-port EtherCAT device controller with two integrated Ethernet PHYs, each providing a full-duplex 100BASE-TX transceiver operating at 100 Mbps. The controller is packaged in an 80-lead TQFP with exposed pad, measuring 12 x 12 mm, and is designed for industrial EtherCAT slave-controller implementations. An EtherCAT device controller, or ESC, is the interface between an EtherCAT network and an embedded automation system. It manages EtherCAT communication while exposing process data through a process data interface to a microcontroller or other control logic. As an Ethernet controller IC, the LAN9254 combines EtherCAT protocol handling with integrated physical-layer transceivers, reducing the number of separate network components required on the controller board. The LAN9254 provides three EtherCAT ports and integrates two 10/100 Ethernet PHYs. Each PHY supports full-duplex 100BASE-TX operation at 100 Mbps. HP Auto-MDIX support allows the design to use either straight-through or crossover Ethernet cables, simplifying installation in factory automation, industrial control, and laboratory networks where field cabling may vary. The target device is identified as LAN9254-V/JRX, while related ordering codes include LAN9254/JRX and LAN9254T-V/JRX in the same 80-TQFP-EP package. Microchip also publishes a hardware design checklist and a LAN9252-to-LAN9254 migration guide. These documents are important when assigning configuration straps, reviewing pin differences during migrations, and checking the 80-pin TQFP layout against the target schematic. Typical applications include EtherCAT slave controllers for industrial automation, servo-drive interfaces, distributed I/O modules, motion-control equipment, and factory communication gateways. Its integrated PHYs are especially useful where board area is constrained and external Ethernet magnetics or separate PHY components would otherwise increase design complexity. The controller must still be paired with an appropriate processor interface and suitable magnetic isolation. PCB planning should follow Microchip's LAN9254 hardware design checklist, particularly for the 80-pin TQFP footprint, exposed-pad connection, configuration straps, clock circuitry, and Ethernet differential routing. Review the manufacturer pin-description table before assigning tracks, and verify every supply and ground connection against the device data sheet and hardware checklist. This product record combines the verified device identity, package information, EtherCAT capabilities, and application guidance with same-package ordering alternatives. It also provides practical implementation notes that support component selection, schematic review, PCB planning, and replacement assessment without relying on generic Ethernet-controller descriptions.
LAN9254/JRX - 3-Port EtherCAT Controller | Microchip
The Microchip LAN9254/JRX is a 3-port EtherCAT device controller with two integrated 10/100 Ethernet PHYs, 100 Mbps operation, HP Auto-MDIX support, and an 80-pin TQFP exposed-pad package measuring 12 x 12 mm. It integrates EtherCAT slave-controller functions, Ethernet physical-layer connectivity, configurable digital I/O, and multiple host interfaces for industrial motion and automation equipment. An EtherCAT device controller, or ESC, is the communication IC at the center of an EtherCAT slave device. It manages EtherCAT frames, process data, distributed clocks, and the interface between an EtherCAT network and local control hardware. The LAN9254 hierarchy is EtherCAT device controller, industrial Ethernet controller, network interface IC, and semiconductor. The controller supports 2/3-port configurations and offers an 8-bit or 16-bit host bus, 32 digital I/O, SPI, and MII interfaces. Two full-duplex 100BASE-TX transceivers provide 100 Mbps Ethernet connectivity, while HP Auto-MDIX permits straight-through or crossover cable connections. This combination can reduce external Ethernet PHY circuitry and simplify industrial network PCB routing. Technically, the LAN9254 can operate as a three-port device by using its additional MII connection for a flexible network configuration. The same controller supports EtherCAT Distributed Clocks and is positioned for real-time industrial communication. The 80-TQFP-EP package provides 32 digital I/O in addition to the communication interfaces, making the device suitable for compact, multi-axis industrial control hardware. Typical uses include EtherCAT servo drives, motion controllers, programmable logic control equipment, industrial I/O modules, robotics, and factory automation controllers. Its integrated PHYs are especially useful where each axis or machine node requires Ethernet connectivity without an external 10/100 PHY. PCB design should follow Microchip's LAN9254 Hardware Design Checklist, including careful EtherCAT differential routing, controlled-length or impedance-sensitive interfaces where applicable, solid supply decoupling, and proper exposed-pad thermal management. Review the migration guide when moving from LAN9252 or LAN9253 because the source explicitly identifies pin and configuration-strap differences. This product record combines verified manufacturer and distributor information, package and interface details, sourcing context, and practical EtherCAT design guidance. It also distinguishes known order-code variants from unsupported substitutes so engineers can assess drop-in suitability without relying on generic cross-reference results.
LAN9254T-I/JRX 3-Port EtherCAT Controller | Microchip Technology
The Microchip Technology LAN9254T-I/JRX is a 3-port EtherCAT device controller, also called an ESC, with two integrated 100BASE-TX Ethernet PHYs. It supports full-duplex 100 Mbps operation, HP Auto-MDIX, and industrial-oriented EtherCAT slave-controller functionality in an 80-TQFP-EP package measuring 12 x 12 mm. The controller combines EtherCAT protocol processing with Ethernet physical-layer connectivity, reducing the number of separate interface devices required in an industrial network node. An EtherCAT device controller is a specialized network-interface IC that manages EtherCAT communication between a master and slave devices. In the broader hierarchy, it is an Ethernet controller, an industrial communication interface, a semiconductor, and ultimately a power-management-dependent embedded interface component. The LAN9254 family integrates the EtherCAT processing function and two Ethernet PHYs to support industrial automation, motion-control, robotics, and distributed machine-control designs. The LAN9254T-I/JRX is identified as a 2/3-port EtherCAT slave controller with 32 digital I/O signals and integrated Ethernet PHYs. Its two integrated PHYs each support a full-duplex 100BASE-TX transceiver, allowing the controller to participate in EtherCAT line and branch topologies. HP Auto-MDIX supports both direct and crossover LAN cables, which simplifies installation and reduces cabling constraints in factory networks. The 80-TQFP-EP package provides a compact surface-mount footprint with an exposed pad intended for board-level thermal management. Because the controller combines digital communications logic, Ethernet transceiver functions, and programmable I/O resources, careful partitioning of power, ground, clock, differential Ethernet, and digital signal paths is important. Keep high-speed Ethernet traces impedance-controlled, provide the decoupling recommended by the manufacturer, and connect the exposed thermal pad to the appropriate ground and copper system. Typical applications include EtherCAT slave modules, servo-drive electronics, programmable logic controllers, industrial robot controllers, machine vision interfaces, distributed I/O stations, and embedded automation equipment. The integrated dual-PHY architecture is especially useful when a compact slave device needs multiple Ethernet connections without external Ethernet transceiver packages. The key design consideration is that LAN9254T-I/JRX is a protocol-specific controller rather than a general-purpose Ethernet MAC. Firmware, an EtherCAT slave stack, hardware timing, PHY characteristics, and the selected MCU or FPGA must therefore align with the intended master and device architecture. Review the manufacturer LAN9254 product page and datasheet for electrical limits, register definitions, reference clock requirements, and the complete exposed-pad land pattern before releasing a PCB. This product page consolidates the verified package and interface information, distinguishes confirmed LAN9254 family alternatives, and adds application guidance for engineers planning an EtherCAT slave design.
LAN9254T/JRX - 3-Port EtherCAT Slave Controller | Microchip
The Microchip LAN9254T/JRX is a 3-port EtherCAT device controller (ESC) with two integrated 100BASE-TX Ethernet PHYs, a 3.3 V supply, and 32 digital I/Os, packaged in an 80-pin TQFP with exposed pad (12 x 12 mm) for -40 C to +85 C industrial operation. The device operates at 100 Mbps per port in full-duplex mode and supports HP Auto-MDIX for direct or crossover cable connections. An EtherCAT slave controller is the real-time protocol engine that terminates an EtherCAT segment on an industrial network. It sits between the EtherCAT master and the fieldbus device logic, decoding distributed clock timing, processing the 1-bit working-counter protocol, and forwarding frames port to port with only a few hundred nanoseconds of link delay. In system terms, the LAN9254T/JRX belongs to the hierarchy EtherCAT ESC > industrial Ethernet controller > network interface controller > interface IC > semiconductor. Key features include 2 or 3 logical EtherCAT ports implemented through two integrated PHYs plus a loopback-capable MII interface, 32 configurable digital I/Os for direct slave-signal interfacing, integrated HP Auto-MDIX that removes the need for strapping resistors and straight-through versus crossover cable rules, and a single 3.3 V supply. The 32 DIGIOs let a simple drive or I/O module present real process data to the master without an external discrete I/O expander. Architecturally, the LAN9254T/JRX combines a dedicated EtherCAT protocol engine with dual 100BASE-TX transceivers in one die, so the board needs only a magnetic Ethernet isolation pair per port and a small crystal or oscillator for the 25 MHz reference. Integration reduces BOM count, frees PCB area, and shortens the timing path between the PHY and the MAC, which supports deterministic cycle times in motion-control loops. Typical applications include servo and stepper drive inverters, industrial I/O modules, robot controller peripherals, and PLC-adjacent automation nodes where the master polls the ESC over EtherCAT and the DIGIOs carry limit switches, brake releases, or discrete sensor lines. Designers should plan the 25 MHz reference clock and the differential magnetics layout carefully: keep the 100BASE-TX pairs short and impedance controlled, and follow the reference schematic for the PHY termination and decoupling network. This page consolidates distributor availability, drop-in same-package alternatives, and practical layout and thermal guidance that go beyond the manufacturer product summary.
LAN9255-I/ZMX019 - EtherCAT Slave Controller + Cortex-M4F MCU | Microchip
The Microchip Technology LAN9255-I/ZMX019 is a 2/3-port EtherCAT device controller (ESC) System-In-Package (SIP) integrating dual 100BASE-TX Ethernet PHYs, the Microchip LAN9253 ESC, and the Microchip SAM E53J ARM Cortex-M4F MCU into a single 128-pin TQFP (14x14 mm) package. It supports 100 Mbps (100BASE-TX) full-duplex communication, includes 512 kB of integrated MCU memory, and offers USB 2.0 plus RMII host interfaces for broad system connectivity. An EtherCAT slave controller is a specialized industrial-Ethernet IC that offloads the EtherCAT protocol stack (originally developed by Beckhoff Automation) from the host processor, allowing deterministic sub-cycle communication on standard 100BASE-TX cabling. EtherCAT belongs to the industrial-Ethernet protocol family alongside PROFINET, EtherNet/IP, and SERCOS, and is governed by the ETG (EtherCAT Technology Group). Within the broader hierarchy, the LAN9255 sits as an Industrial Communication IC -> Network Controller -> Semiconductor. Integrating the PHY, ESC, and application MCU into one SIP reduces board area, simplifies EMC design, and removes the need for an external host MCU in cost-sensitive slave designs. Key features of the LAN9255-I/ZMX019 include three EtherCAT ports (Port 0, Port 1, and a cascaded/loopback Port 2), integrated dual 100BASE-TX PHYs that eliminate external magnetics interfacing complexity, USB 2.0 Full-Speed (12 Mbps) device port, RMII interface for an external host MCU if desired, on-chip Cortex-M4F MCU with FPU for application code, hardware offload of EtherCAT mailbox and process-data handling, and industrial-grade -40 C to +85 C operation. The 128-TQFP package is lead-free and RoHS compliant for global industrial deployment. The LAN9255 architecture combines Microchip's proven LAN9253 ESC IP with the SAM E53J ARM Cortex-M4F microcontroller, enabling stand-alone EtherCAT slave designs. The dual integrated PHYs each provide full-duplex 100BASE-TX transceivers with HP auto-MDI/MDIX, removing the need for two external PHY ICs. Distributed clocks and cable redundancy features are handled in hardware, ensuring deterministic communication for servo, motion, and I/O applications. The device works with the MPLAB Harmony EtherCAT Slave Stack and Microchip's EVB-LAN9255 evaluation platform. Typical applications for the LAN9255-I/ZMX019 include EtherCAT servo drives, distributed I/O modules, stepper motor controllers, sensor and encoder EtherCAT slaves, hydraulic valve drivers, and industrial robot subsystems. The integrated MCU + dual-PHY combination is particularly attractive for designers building minimum-BOM EtherCAT slaves without a separate host processor. When designing with this part, ensure the 128-TQFP thermal pad is soldered to a substantial ground copper pour for heat extraction and signal-integrity performance. Use Microchip's AN-DS LAN9255 PHY layout guidelines for proper Ethernet magnetics and RJ45 interface. The integrated MCU eliminates the need for an external application processor in many designs, simplifying BOM cost. This page synthesizes distributor pricing, drop-in alternatives, and application-focused design guidance that goes beyond what the LAN9255 datasheet (Microchip document 00003646B) covers alone.
LAN9255-V/ZMX020 - EtherCAT Slave Controller with MCU | Microchip
The Microchip Technology LAN9255-V/ZMX020 is a 2/3-port EtherCAT Device Controller with integrated dual 100BASE-TX PHYs and an integrated SAM E53J 32-bit ARM Cortex-M4F MCU, packaged in a 128-pin TQFP-EP (14x14 mm) with exposed thermal pad. It combines an EtherCAT slave controller, two Ethernet PHYs, and an application microcontroller in a single System-In-Package (SiP), eliminating the need for an external MCU on simple EtherCAT slave node designs. An EtherCAT slave controller (ESC) is a specialized industrial-Ethernet IC that implements the Beckhoff EtherCAT slave protocol on the device side of an EtherCAT network. EtherCAT is a deterministic real-time Ethernet standard used for synchronized motion control, I/O, and drive communication in factory automation. The ESC sits below the EtherCAT master and the standard Ethernet/IP stack in the network hierarchy and works alongside general industrial controllers like PLCs and motion controllers. Key features of the LAN9255-V/ZMX020 include dual integrated 100BASE-TX Ethernet PHYs supporting 100 Mbps full-duplex, a 3-port EtherCAT switch fabric supporting daisy-chain and ring topologies, USB 2.0 FS device/host interface, RMII for external PHY connection, SPI/QSPI for host communication, and 1024 KB of integrated Flash and 256 KB SRAM inside the SAM E53J MCU die. The integrated MCU is pre-flashed with a bootloader and can run application code for simple slaves, removing external processor overhead. The device is designed for high-volume industrial EtherCAT slave applications where board space, BOM cost, and deterministic cycle time are critical. Typical cycle times below 62.5 µs are achievable through hardware FMMU, SyncManager, and DC (Distributed Clocks) engines. Typical applications include EtherCAT digital and analog I/O modules, servo drives and stepper motor drivers, robotics servo nodes, sensor hubs, encoder interfaces, and other industrial automation peripherals. The dual PHY + MCU integration makes it ideal for compact, low-cost slaves with on-board intelligence. When designing with the LAN9255, ensure proper 25 MHz reference oscillator quality for jitter compliance, route the MII/RMII traces as 50-ohm controlled impedance, and place the decoupling capacitors as close to the supply pins as possible. The exposed thermal pad must be soldered to a sufficient copper pour for thermal dissipation. This page synthesizes distributor pricing across 9 channels, true drop-in alternatives in the same 128-TQFP-EP footprint, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for selection, sourcing, and integration.
LAN9303-ABZJ - 3-Port 10/100 Ethernet Switch | Microchip
Microchip Technology LAN9303-ABZJ is a highly integrated, full-featured three-port managed Ethernet switch for embedded consumer, industrial automation, and communications equipment. It provides three 10/100 Base-T/TX Ethernet ports in a compact 56-pin QFN package measuring 8 mm by 8 mm. The LAN9303 family was application-optimized for products with short development cycles and low system cost requirements, providing a practical alternative to combining discrete Ethernet controllers, PHYs, switches, magnetics, and supporting interface circuitry. An Ethernet switch is a network-semiconductor device that receives frames at one port, examines their destination information, and forwards traffic to the appropriate port or ports. A managed switch adds configuration and monitoring functions that are useful when a product needs controlled network behavior, diagnostics, or host access. Within the broader hierarchy, the LAN9303 is a managed Ethernet switch, an Ethernet interface IC, and ultimately a semiconductor designed for embedded networking. The principal feature set includes three integrated 10/100 Ethernet ports, management support, a compact surface-mount footprint, and host-controlled configuration through the supported device interfaces. Its 8 mm by 8 mm QFN construction helps reduce board area compared with discrete three-port networking solutions. This makes the device suitable for adding multiple Ethernet connections to embedded systems without requiring a separate full-size switch module. The LAN9303 architecture integrates the switching function and 10/100 Ethernet physical-layer functions into one device. Integration can reduce external component count, simplify board routing, and reduce software effort because one local device can manage multiple copper Ethernet ports. This integration is especially valuable in consumer electronics, industrial controllers, embedded appliances, and compact network-interface equipment where physical space and development schedules constrain the design. Typical implementations include industrial automation controllers, embedded network appliances, consumer electronics with multiple Ethernet ports, and equipment that bridges or distributes 10/100 traffic. The three-port configuration supports designs where a host connects to one port while external devices use the remaining ports, or where several machine-control nodes share a compact Ethernet backbone. A key design consideration is that this is a 10/100-class Ethernet switch rather than a Gigabit Ethernet device. Designs requiring 1000Base-T operation must use a different Ethernet switch. Board layout should follow the manufacturer's reference schematic and layout guidance, including controlled-impedance differential pairs, proper magnetics interface connections, solid supply and ground planes, and decoupling close to the device. This product page consolidates the device identity, package information, verified sourcing links, functional alternatives, application guidance, and engineering-oriented comparison points. It also identifies where detailed electrical characteristics or absolute maximum ratings must be confirmed in the manufacturer datasheet before a new design is released.
LAN9311-NU - 2-Port 10/100 Managed Ethernet Switch | Microchip
The Microchip LAN9311-NU is a full-featured, 2-port 10/100 managed Ethernet switch controller with integrated 10/100 Base-T/TX PHY support and an I2C interface, packaged in a 128-pin VTQFP measuring 14 x 14 mm. It delivers 10 Mbit/s and 100 Mbit/s operation for embedded networking products that need compact, integrated Ethernet connectivity. An Ethernet switch controller is a semiconductor that combines media-access control, frame handling, port management, and physical-layer functions into an embedded networking solution. The LAN9311 belongs to the interface IC and Ethernet switch hierarchy, allowing equipment designers to connect processors, controllers, sensors, and industrial equipment through managed 10/100 Ethernet without implementing a discrete switching subsystem. Verified features include a 32 Kbyte buffer RAM, a 1 K-entry forwarding table, and IEEE 802.1Q VLAN support with 16 groups. The switch also provides programmable quality-of-service support through four dynamic queues per port. Full-duplex and half-duplex operating modes are supported, giving designers flexibility across embedded infrastructure, industrial automation, and connected equipment. The LAN9311-NU integrates two 10/100 Ethernet ports and combines switch management with a 16-bit non-PCI host interface for embedded processor connectivity. Its managed-switch functions include VLAN grouping, QoS prioritization, address learning through the 1 K-entry forwarding table, and frame buffering through 32 Kbyte of RAM. These features support deterministic traffic handling when multiple endpoints share the same two-port Ethernet segment. Typical uses include industrial Ethernet gateways, embedded routers, set-top and communication equipment, factory-floor controllers, and networked measurement systems. A design can place the controller beside a processor and Ethernet magnetics, then use the host interface for configuration and status monitoring. The supplied LAN9311 reference schematic emphasizes placing bulk and low-ESR decoupling capacitors close to the specified power pins. The main design consideration is interface and power integrity. Follow the manufacturer's reference schematic and 128-pin VTQFP placement checklist, especially the 49.9 ohm TX termination pull-up arrangement described for the second PHY interface. Confirm package routing, magnetics isolation, thermal performance, and all pin assignments against the manufacturer documentation before layout release. This page consolidates verified distributor availability, package and interface details, cross-reference findings, comparison parameters, and practical LAN9311 layout guidance. It is intended to accelerate component selection and PCB planning while clearly separating confirmed specifications from data requiring a manufacturer datasheet review.
LAN9311-NZW - 2-Port 10/100 Ethernet Switch | Microchip
The Microchip Technology LAN9311-NZW is a two-port 10/100 managed Ethernet switch with integrated Ethernet controller functionality, an I2C interface, and a 128-XVTQFP package measuring 14 mm by 14 mm. The device combines two 10 Mbps or 100 Mbps Ethernet ports with switching, media-access control, and physical-layer functions in one package. Its commercial temperature grade and integrated design target embedded systems requiring controlled networking cost and compact implementation. An Ethernet switch is a networking semiconductor that connects multiple Ethernet endpoints through one integrated switching fabric. Within the embedded-device hierarchy, the LAN9311-NZW belongs to the Ethernet interface controller family, combining interface IC functionality with a two-port 10/100 switch. This integration can reduce the number of separate Ethernet components required in compact industrial, communications, and embedded control equipment. The principal device features include two 10/100 Ethernet switch ports, an I2C management interface, integrated MAC functionality, and a 128-terminal square TQFP package. The 14 mm by 14 mm package provides a defined PCB footprint for embedded Ethernet designs. Because the switch supports both 10 Mbps and 100 Mbps operation, it can connect equipment using Fast Ethernet while providing a managed-network interface for configuration and control. The LAN9311 family is designed for embedded applications where performance, flexibility, ease of integration, and system cost control are important. Integrating the switch and controller functions can shorten the connection between an embedded processor and its Ethernet ports. The I2C interface also gives a host processor a compact management path, allowing software to access switch functions without dedicating a separate parallel management bus. Typical applications include industrial control systems, embedded gateways, communications equipment, instrumentation, and connected control products. The two-port architecture fits designs that need local Ethernet connectivity for a host processor and one external network port. Product designs should also account for magnetic isolation, connector selection, clocking, and the reference-design filtering and decoupling requirements associated with Ethernet magnetics and high-speed signals. The LAN9311-NZW uses the 128-XVTQFP package and is supplied in a commercial-grade configuration identified by the NZW suffix. Use the manufacturer datasheet and the LAN9311 reference-design schematic when assigning every power, clock, transceiver, and signal-integrity connection. Follow the recommended capacitor placement and low-ESR requirements shown in the reference design to preserve Ethernet performance and power stability.
LAN9311I-NZW - 2-Port 10/100 Managed Ethernet Switch | Microchip Technology
The Microchip Technology LAN9311I-NZW is a two-port 10/100 managed Ethernet switch with integrated 10BASE-T and 100BASE-TX PHYs, a parallel host interface, and a 128-pin XVTQFP package measuring 14 mm by 14 mm. It combines two Fast Ethernet switch ports, management support, and host connectivity in one component for cost-controlled embedded networking designs. An Ethernet switch is a networking semiconductor that connects multiple Ethernet nodes, manages traffic at the data-link layer, and isolates collision domains. The LAN9311I-NZW belongs to the managed switch hierarchy and supports full- and half-duplex 10BASE-T and 100BASE-TX operation. Its integrated PHYs reduce the need for separate PHY devices, while its 16-bit non-PCI CPU interface supports integration with an embedded host processor. The LAN9311 and LAN9311i family supports the IEEE 802.3 Ethernet protocol and the IEEE 802.1D and IEEE 802.1Q network-management specifications. Configuration straps allow default parameters and custom configurations to be selected when chip-level resets are released or after the nRST input is asserted. This hardware-configured startup behavior can simplify firmware initialization in systems where fixed switch parameters are acceptable. The LAN9311I-NZW integrates a 2.5 V core supply with 3.3 V I/O capability and includes an integrated 3.3 V regulator for selected PHY-related requirements. Its parallel CPU interface provides a direct connection to an embedded processor rather than requiring a PCI bus. The 128-pin XVTQFP is intended for multilayer PCB layouts where short high-speed signal routes, continuous ground planes, and controlled clock distribution are important. Typical uses include industrial embedded Ethernet equipment, network interface controllers, set-top boxes, digital video recorders, IP cameras, USB-to-Ethernet bridges, and industrial control modules. For each application, the two integrated Fast Ethernet ports reduce board area, while the management protocol support helps implement basic bridging, filtering, and prioritization functions. Layout is the main integration constraint. The manufacturer's LAN9311I XVTQFP placement checklist calls for separate 3.3 V I/O decoupling capacitors near the relevant power pins and recommends an 0603 SMD format for easier placement. Keep the CPU interface, clock source, reset network, and PHY traces short, provide an uninterrupted ground plane, and follow the manufacturer pin and component-placement guidance before release to production. This product page summarizes the LAN9311I-NZW family, package and interface requirements, standards support, application fit, and verified design guidance. It also separates documented capabilities from unknown electrical details so engineers can consult the manufacturer datasheet for final power, timing, pin, and qualification decisions.
LAN9312-NU - 2-Port 10/100 Managed Ethernet Switch | Microchip
Microchip Technology LAN9312-NU is a two-port 10/100 managed Ethernet switch with a 32-bit non-PCI CPU interface, IEEE 802.3 Ethernet support, and 128-pin VTQFP packaging. It combines two integrated Fast Ethernet network ports with switching and host-interface functions for embedded systems. According to the verified manufacturer and distributor results, the LAN9312-NU supports 10BASE-T and 100BASE-TX operation, full- and half-duplex protocols, and 802.1D/802.1Q network-management protocols. A managed Ethernet switch is a network-interface device that connects multiple Ethernet ports and forwards frames between them while providing management functions beyond basic unmanaged switching. In the broader hierarchy, LAN9312-NU belongs to Ethernet switches, then network interface controllers, interface ICs, and semiconductors. Its integrated two-port architecture can reduce the need for separate Ethernet PHYs and switch devices in embedded equipment. Key verified features include two 10/100 Ethernet ports, integrated 10BASE-T/100BASE-TX PHY support, a parallel 32-bit non-PCI CPU interface, and support for industry-standard Fast Ethernet protocols. The verified product listings identify the package as 128-pin VTQFP, measuring 14 mm by 14 mm. The device is intended for embedded applications where performance, flexibility, integration, and system-cost control are important. The LAN9312-NU architecture is designed to interface an embedded processor directly with Ethernet networking while avoiding a PCI bus requirement. This makes it suitable for industrial controllers, embedded gateways, test equipment, building-automation controllers, and other systems requiring dual-port Fast Ethernet connectivity. The independent port support also allows designs to use two network links rather than a single-port Ethernet arrangement. Typical deployment considerations include correct magnetics selection, controlled impedance routing, termination placement, power-supply decoupling, and validation of the non-PCI host interface. The verified Microchip placement checklist specifically calls for the LAN9312 (X)VTQFP PHY interface to place the 49.9 ohm TX termination pull-up close to the appropriate LAN9312 pins when Auto-MDIX is enabled, or close to the magnetics when Auto-MDIX is disabled. For exact pin assignments, timing, electrical limits, clock requirements, and initialization values, use the manufacturer datasheet rather than distributor summaries. The supplied web results do not provide complete verified values for several detailed electrical, timing, and package parameters; those fields are explicitly marked as data-needed below. This page combines verified product identity, protocol capability, package information, sourcing links, and design guidance while avoiding unsupported parameter invention.
LAN9312-NZW - 2-Port 10/100 Ethernet Switch | Microchip
The Microchip Technology LAN9312-NZW is a two-port 10/100 managed Ethernet switch with a 32-bit non-PCI CPU interface, supplied in a 128-pin XVTQFP package measuring 14 x 14 mm. It combines two Fast Ethernet switch ports, integrated 10BASE-T and 100BASE-TX physical-layer functions, and host-interface logic for embedded equipment requiring controlled integration, network management, and system-cost reduction. The LAN9312 supports full- and half-duplex Ethernet operation and also implements 802.1D and 802.1Q network-management functions. A managed Ethernet switch is a network-semiconductor device that connects multiple Ethernet ports, controls traffic between them, and provides higher-level functions such as VLAN handling and bridge management. Within the product hierarchy, the LAN9312 is an Ethernet switch, an interface controller, a networking integrated circuit, and a semiconductor designed for embedded systems. Its integrated CPU interface allows a host processor to configure switch registers, monitor status, and manage traffic without requiring a separate external Ethernet controller for basic switched-port operation. The primary technical features include two 10/100 Ethernet ports, a 32-bit non-PCI CPU interface, 12 configurable general-purpose input/output pins, and support for full- and half-duplex 10BASE-T and 100BASE-TX links. The 12 GPIO pins can operate individually as inputs, push-pull outputs, or open-drain outputs and can generate interrupts with configurable polarity. These resources make the switch useful for products that need Ethernet connectivity alongside status LEDs, reset control, relay control, or other host-monitored signals. The LAN9312 architecture consolidates switch fabric, Ethernet PHY, network-management registers, and host-interface functions into one integrated device. According to the manufacturer datasheet, the device complies with the IEEE 802.3 Ethernet protocol specification and the 802.1D and 802.1Q network-management protocol specifications. This combination supports standard Fast Ethernet endpoints while allowing embedded software to implement bridging and VLAN behavior. The 128-pin package exposes the required data, control, clock, power, and PHY connections, making careful high-speed and power-layout discipline important in the host board design. Typical applications include industrial Ethernet gateways, embedded routers, programmable controllers, network-attended test equipment, industrial HMI panels, and compact control systems that need two Fast Ethernet ports. It is particularly relevant where a board must present one Ethernet port to an upstream network and one port to an internal controller or service interface. Because it provides a managed, non-PCI interface, the LAN9312 can also complement higher-speed interface PHYs such as the site-listed DP83867 family when an architecture combines copper Ethernet with additional physical layers. The main design consideration is integration rather than component substitution. The device requires careful separation of analog and digital supplies, controlled clock and reset behavior, and a PCB layout that minimizes coupling between Ethernet magnetics, PHY circuitry, CPU signals, and switching nodes. The manufacturer placement checklist specifically calls for the Auto-MDIX TX termination pull-up associated with PHY 2 to be placed close to the LAN9312 when Auto MDIX is enabled. A pin-to-pin alternative should not be selected solely from the product family name; its exact package, exposed-pad arrangement, electrical limits, and host-interface behavior must be confirmed against the manufacturer datasheet. This product page combines the manufacturer product description, the official LAN9312 datasheet, the 128-pin placement checklist, distributor package information, and available cross-reference records. It also provides practical integration guidance, verified pricing evidence where an explicit quantity break exists, and engineering-focused comparison criteria for evaluating a replacement without assuming that a related switch is electrically interchangeable.
LAN9313-NZW - 3-Port 10/100 Ethernet Switch | Microchip
The Microchip Technology LAN9313-NZW is a three-port 10/100 managed Ethernet switch with a parallel MII interface, 128-XVTQFP package, and 14 mm by 14 mm body size. It supports 10BASE-T, 100BASE-TX, and 100BASE-FX connectivity according to the manufacturer datasheet, making the device suitable for embedded industrial, communications, and networked equipment requiring three integrated Ethernet ports. An Ethernet switch is a network-semiconductor category that forwards Ethernet frames between connected ports while supporting full- and half-duplex operation. Within the networking hierarchy, the LAN9313-NZW is an Ethernet switch controller with an embedded Ethernet PHY and Media Independent Interface, bridging an embedded processor or host processor to copper or fiber Ethernet networks. It also supports IEEE 802.1D and 802.1Q network-management protocol specifications. Three configurable general-purpose input/output pins are available for integration with control, status, or interrupt functions beyond the primary Ethernet interface. The device combines switching, physical-layer, and host-interface functions in one package, reducing the need for separate Ethernet PHY components when the parallel MII architecture is appropriate for the host processor. The LAN9313-NZW architecture integrates three 10/100 Ethernet ports with a parallel MII connection to the host. This parallel interface suits embedded systems that have a dedicated controller bus rather than a USB or RGMII interface. Its 128-XVTQFP package provides a compact surface-mount implementation for space-constrained equipment, although exact pin assignments and exposed-pad thermal details must be confirmed in DS00002288A before layout. Typical uses include industrial control equipment, embedded gateways, factory networking modules, communications appliances, and systems requiring both 10BASE-T and 100BASE-TX ports. A 100BASE-FX-capable implementation can also serve fiber-based network interfaces when the board includes suitable optical magnetics and the required external circuitry. The main design consideration is the parallel MII interface. Its wiring, signal-integrity requirements, and host-bus compatibility must be evaluated against the processor used in the design. Decoupling, exposed-pad connection, clocking, magnetics, and LED interfaces should be implemented using the guidance in the manufacturer datasheet and LAN9313 reference-design schematic rather than inferred from general Ethernet practice. This product page consolidates the verified manufacturer and distributor information, identifies package-related documentation gaps, compares the documented LAN9313 family variant, and provides selection guidance that helps distinguish a genuine drop-in option from a merely similar Ethernet controller.
LAN9313I-NZW - 3-Port 10/100 Managed Ethernet Switch | Microchip
The Microchip Technology LAN9313I-NZW is a three-port 10/100 managed Ethernet switch with an integrated MII host interface, operating from a 3.3 V supply in a 128-lead XVTQFP (14 x 14 mm) package with exposed pad. It draws about 135 mA of supply current and complies with the IEEE 802.3 full- and half-duplex 10BASE-T and 100BASE-TX protocol specifications plus 802.1D and 802.1Q network management specifications. A managed Ethernet switch is an active network device that learns MAC addresses and forwards frames between ports with filtering, VLAN tagging and priority handling, rather than repeating traffic blindly like a hub. In the product-type hierarchy, this part sits as an Ethernet switch, inside Ethernet interface controllers, inside network interface ICs, and finally inside integrated circuits for data communication. The LAN9313 family is the managed-switch branch of the 10/100 family; the LAN8710/LAN8720 parts are unmanaged or single-port alternatives, and the LAN9115/LAN9215 parts are single-port controllers rather than switches. Key features include three integrated 10/100 Ethernet PHYs in one device, a 16-bit MII interface to the host processor, hardware-based frame handling that offloads forwarding work from the MCU, 802.1Q VLAN support, 802.1D spanning-tree-aware managed switching, and a 48 MHz or 25 MHz crystal-free clocking option that reduces external component count. The three PHYs each support auto-negotiation, auto-polarity correction and auto-MDIX, so each port connects directly to a magnetics-based RJ-45 without manual crossover handling. The device integrates the digital switching core, the three PHY analog front ends and the MII host interface in one package, which removes the need for an external switch ASIC plus discrete PHYs. Because the MII interface is parallel rather than serial RMII, the host processor must provide a 16-bit data bus and a reference clock, which is straightforward on most industrial 32-bit microcontrollers and application processors with sufficient GPIO and DMA capability. Typical uses include industrial Ethernet gateways, factory floor controllers, embedded routers, set-top and access equipment, printer and copier network interfaces, and any embedded product that needs to fan out a single host processor to three wired Ethernet ports while retaining VLAN and traffic-management control. When designing around this part, budget the MII bus carefully: it needs roughly 16 data lines plus control signals, and the host processor must supply a 25 MHz or 50 MHz reference clock with the correct phase relationship. Place the 1.2 V and 3.3 V decoupling capacitors close to the supply pins and keep the exposed pad tied to ground for thermal performance. This page consolidates manufacturer datasheet data, distributor availability, package details, drop-in alternatives and practical layout guidance for engineers who want everything about the LAN9313I-NZW in a single reference rather than spread across datasheet pages and distributor listings.
LAN9313I-NZW-TR - 3-Port 10/100 Managed Ethernet Switch | Microchip (Tape & Reel)
The Microchip Technology LAN9313I-NZW-TR is a three-port 10/100 managed Ethernet switch with an integrated MII host interface, operating from a 3.3 V supply in a 128-lead XVTQFP (14 x 14 mm) package with exposed pad. It draws about 135 mA of supply current and complies with the IEEE 802.3 full- and half-duplex 10BASE-T and 100BASE-TX protocol specifications plus 802.1D and 802.1Q network management specifications. A managed Ethernet switch is an active network device that learns MAC addresses and forwards frames between ports with filtering, VLAN tagging and priority handling, rather than repeating traffic blindly like a hub. In the product-type hierarchy, this part sits as an Ethernet switch, inside Ethernet interface controllers, inside network interface ICs, and finally inside integrated circuits for data communication. The LAN9313 family is the managed-switch branch of the 10/100 family; the LAN8710/LAN8720 parts are unmanaged or single-port alternatives, and the LAN9115/LAN9215 parts are single-port controllers rather than switches. Key features include three integrated 10/100 Ethernet PHYs in one device, a 16-bit MII interface to the host processor, hardware-based frame handling that offloads forwarding work from the MCU, 802.1Q VLAN support, 802.1D spanning-tree-aware managed switching, and a 48 MHz or 25 MHz crystal-free clocking option that reduces external component count. The three PHYs each support auto-negotiation, auto-polarity correction and auto-MDIX, so each port connects directly to a magnetics-based RJ-45 without manual crossover handling. The device integrates the digital switching core, the three PHY analog front ends and the MII host interface in one package, which removes the need for an external switch ASIC plus discrete PHYs. Because the MII interface is parallel rather than serial RMII, the host processor must provide a 16-bit data bus and a reference clock, which is straightforward on most industrial 32-bit microcontrollers and application processors with sufficient GPIO and DMA capability. Typical uses include industrial Ethernet gateways, factory floor controllers, embedded routers, set-top and access equipment, printer and copier network interfaces, and any embedded product that needs to fan out a single host processor to three wired Ethernet ports while retaining VLAN and traffic-management control. When designing around this part, budget the MII bus carefully: it needs roughly 16 data lines plus control signals, and the host processor must supply a 25 MHz or 50 MHz reference clock with the correct phase relationship. Place the 1.2 V and 3.3 V decoupling capacitors close to the supply pins and keep the exposed pad tied to ground for thermal performance. This page consolidates manufacturer datasheet data, distributor availability, package details, drop-in alternatives and practical layout guidance for engineers who want everything about the LAN9313I-NZW-TR in a single reference rather than spread across datasheet pages and distributor listings.
LAN9352/ML - 2-Port 10/100 Managed Ethernet Switch, SPI/SQI | Microchip
The Microchip LAN9352/ML is a high-performance, small-footprint, full-featured 2-port managed Ethernet switch with integrated 10/100 Base-T/TX PHYs, delivered in a 72-pin QFN (10x10 mm) package with exposed pad. It targets consumer, embedded, and industrial designs that require highly integrated, cost-effective dual-port switching with a non-PCI 16-bit SPI/SQI host interface. The device supports 1.8V to 3.3V I/O and core supplies, easing integration with low-voltage MCUs and ASICs. A managed Ethernet switch is a Layer-2 networking device that connects multiple Ethernet segments, performs MAC-based frame forwarding, and exposes configuration/management features such as VLANs, QoS, port mirroring, and statistics counters. The LAN9352 sits in the managed-fast-Ethernet-switch IC taxonomy: Ethernet switch -> Layer-2 switch -> managed switch -> integrated-PHY switch. Unlike an unmanaged switch, the LAN9352/ML allows the host MCU to program registers for traffic shaping, IGMP snooping, and storm control, which is critical for real-time industrial protocols and AV streaming. Key features include two integrated 10/100 PHYs with HP Auto-MDIX, support for IEEE 802.1Q VLAN and 802.1p QoS priority, a 16-bit SPI/SQI host interface, optional I2C management, and 32 KB of internal packet buffer. The device operates across the commercial 0C to 70C temperature range and supports Energy Efficient Ethernet (EEE) idle patterns, making it suitable for power-sensitive embedded applications. The LAN9352/ML uses Microchip's proprietary switch fabric and supports cut-through and store-and-forward modes, along with 1.5 KB per-port address table. Hardware-based QoS with four priority queues and a per-port rate limiter enable deterministic traffic shaping for industrial Ethernet, audio/video bridging (AVB), and PROFINET-style real-time protocols. Typical applications include industrial Ethernet gateways, factory automation PLCs, building automation controllers, IP surveillance NVR/DVR switches, point-of-sale terminals, embedded web server appliances, and consumer smart-home hubs that need a low-BOM 2-port switch fabric. The integrated dual-PHY approach removes the need for an external Ethernet transformer-pair, shrinking PCB area. When designing with this device, allocate at least 4-layer routing for the two 100BASE-TX differential pairs to maintain return loss. Place the 72-QFN exposed pad soldered to a continuous ground plane for thermal dissipation; a stitched via array under the EP is recommended. The host SPI/SQI clock can run up to 80 MHz - check MCU timing margin when the switch is in cut-through mode. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, plus a 5-question FAQ block for AEO citation.