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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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LAN9252T/ML

LAN9252T/ML - 2/3-Port EtherCAT Controller | Microchip Technology

The Microchip Technology LAN9252T/ML is a 2/3-port EtherCAT slave controller with dual integrated Ethernet PHYs, supporting full-duplex 100BASE-TX operation at 100 Mbps in a 64-pin QFN package. The controller includes an SPI host interface and supports 100BASE-FX operation through an external fiber transceiver. According to the verified Microchip product information, the LAN9252 family supports HP Auto-MDIX, allowing direct-connect or crossover Ethernet cables without manual cable selection. The LAN9252T/ML is used as an EtherCAT device controller in industrial automation systems where a slave device must exchange cyclic process data with a master controller. Its dual integrated PHYs support Ethernet connectivity within EtherCAT networks, while the SPI interface provides a straightforward connection to a host processor or microcontroller. The T/ML ordering suffix identifies the specific package, temperature, and lead-free configuration; the verified distributor listings identify the device as an Ethernet controller with a 10/100 Base-FX/T/TX PHY, SPI interface, and 64-QFN (9 x 9 mm) package. Key verified characteristics include two integrated Ethernet PHYs, full-duplex 100BASE-TX transceivers, 100 Mbps operation, HP Auto-MDIX support, and external-transceiver-based 100BASE-FX support. These features make the controller appropriate for EtherCAT servo drives, I/O modules, PLC communication interfaces, industrial gateways, and motion-control equipment. The SPI interface also allows the controller to be paired with an embedded microcontroller or application-specific processor for EtherCAT protocol handling. The LAN9252T/ML is not a general-purpose Ethernet switch and is not a memory IC despite one distributor classification. Its primary function is EtherCAT slave-controller operation. The 64-pin QFN footprint requires careful PCB layout, including high-speed differential routing for the Ethernet PHYs, controlled clock distribution, solid ground-plane continuity, and decoupling close to the device pins. Designers should verify the complete pinout, electrical limits, operating-temperature range, and power requirements against the current Microchip datasheet before release to production. This product page summarizes verified manufacturer and distributor information, identifies the available same-package drop-in candidates, and provides practical selection and design guidance without inventing electrical values that were not present in the supplied source data.

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LAN9252T/PT

LAN9252T/PT - 2/3-Port EtherCAT Controller | Microchip

Microchip LAN9252T/PT is a 2/3-port EtherCAT device controller with dual integrated Ethernet PHYs, each containing a full-duplex 100BASE-TX transceiver operating at 100 Mbps. The device is packaged in a 64-pin TQFP-EP, 10 x 10 mm surface-mount package and provides an SPI interface for host-controller communication. Its integrated Ethernet PHYs support HP Auto-MDIX, allowing direct-connect or crossover Ethernet cables to be used. An EtherCAT device controller, or ESC, is the communications element that connects an EtherCAT slave device to an EtherCAT network. The LAN9252T/PT integrates two Ethernet PHYs and provides the hardware interface required for EtherCAT communication. This integration reduces the number of separate network interface components required in an EtherCAT slave design and provides a defined path between the host processor and the EtherCAT network. The verified product information identifies the LAN9252T/PT as an Ethernet controller with a 10/100BASE-TX PHY, SPI interface, and 64-TQFP-EP package. The two integrated PHYs each support full-duplex 100BASE-TX operation at 100 Mbps. Because the PHYs support HP Auto-MDIX, system integrators can use either straight-through or crossover cables without manually configuring the physical connections. The LAN9252 family is positioned for industrial EtherCAT applications where an embedded system needs a dedicated network controller rather than a general-purpose host Ethernet interface. Relevant application categories include EtherCAT slave devices, industrial automation equipment, motion-control systems, and distributed control equipment. The SPI host interface allows an embedded controller to access the EtherCAT controller functions while the integrated PHYs handle the physical Ethernet layer connections. The TQFP-EP package provides a 64-pin surface-mount footprint and an exposed-pad construction for board-level heat spreading. The exposed pad must be connected to the appropriate ground plane according to the manufacturer land pattern and datasheet recommendations. Designers should preserve the specified placement and routing of Ethernet, power, and signal connections rather than relying on a generic TQFP footprint. For a new EtherCAT slave design, the critical checks are electrical compatibility, EtherCAT conformance, firmware support, package layout, and the exact operating requirements of the selected companion devices. The LAN9252T/PT is identified as a 1.8 V to 3.3 V device in distributor search data. The manufacturer datasheet should be used as the controlling source for pin electrical characteristics, absolute maximum ratings, PHY behavior, clock requirements, and recommended application circuits. This page consolidates the verified manufacturer and distributor information for LAN9252T/PT and provides application, comparison, and design guidance. Because the supplied web data confirms only one distinct same-package replacement candidate, the alternatives list is intentionally not padded with unverified or functionally similar parts that would require a different footprint.

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LAN9252TI/ML

LAN9252TI/ML - 2/3-Port EtherCAT Controller | Microchip

The Microchip Technology LAN9252TI/ML is a 2/3-port EtherCAT slave controller with two integrated 10/100BASE-TX Ethernet PHYs, an SPI host interface, and a 64-QFN 9 x 9 mm package. It supports 100 Mbps full-duplex Ethernet operation, HP Auto-MDIX, and connection to an external fiber transceiver for 100BASE-FX links. An EtherCAT slave controller, or ESC, is a specialized interface semiconductor that combines EtherCAT protocol processing, Ethernet physical-layer functions, and host communication. Within the industrial communication hierarchy, it links an EtherCAT master and slave network to an embedded controller. The ESC belongs to the broader category of Ethernet interface controllers, combining a communication controller, integrated PHYs, and a serial host interface in one package. The principal advantages of the LAN9252TI/ML include its two integrated Ethernet PHYs, support for both copper and external-transceiver fiber connectivity, and a 64-QFN package that supports compact industrial control designs. The 1.8 V, 2.5 V, and 3.3 V operating options support systems using multiple logic-rail levels. HP Auto-MDIX allows direct or crossover cables to be used without manually configuring receive and transmit pairs. Technically, each integrated PHY contains a full-duplex 100BASE-TX transceiver capable of 100 Mbps operation. The SPI interface provides host access to EtherCAT control functions, while the ESC architecture reduces the number of external Ethernet components required by a slave-node design. The 9 x 9 mm QFN format offers a practical footprint for motion-control, robotics, industrial automation, and embedded equipment, although careful decoupling and high-speed layout remain necessary. Typical applications include EtherCAT servo drives, programmable logic controllers, robot controllers, industrial I/O modules, machine vision equipment, and industrial communication gateways. The integrated PHYs are especially useful when a design requires two 100BASE-TX ports and an EtherCAT link to a higher-level master network without using discrete Ethernet transceiver components. Designers should place input and output decoupling capacitors close to their associated supply pins, route Ethernet pairs as controlled-impedance differential pairs, and maintain the separation specified by the LAN9252 datasheet. The external 100BASE-FX arrangement also requires careful review of transceiver interface timing, signal polarity, and isolation requirements when fiber support is required.

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LAN9252TI/PT

LAN9252TI/PT - 2/3-Port EtherCAT Slave Controller | Microchip

The Microchip Technology LAN9252TI/PT is a 2/3-port EtherCAT device controller (ESC) with dual integrated Ethernet PHYs, each containing a full-duplex 100BASE-TX transceiver supporting 100 Mbps operation. Housed in a 64-pin TQFP-EP (10x10 mm) package with an exposed thermal pad, it operates from 1.8 V/2.5 V/3.3 V supplies and presents a digital SPI host interface. The LAN9252TI/PT supports HP Auto-MDIX and exposes two or three Ethernet ports, enabling designers to build daisy-chain EtherCAT nodes without an external PHY. What is an EtherCAT slave controller? An EtherCAT Slave Controller is the silicon heart of a slave node on an EtherCAT fieldbus, which is a deterministic real-time Ethernet protocol widely used in industrial automation (Beckhoff's EtherCAT). The ESC handles the on-the-fly processing of Ethernet frames, manages distributed clock synchronization, and exposes process data via a host interface such as SPI or parallel bus to an application microcontroller. The LAN9252TI/PT is therefore a bridge IC: it is a slave on the EtherCAT network and a peripheral to a host MCU. It belongs to the wider category of industrial Ethernet controllers, complementing protocols such as PROFINET, EtherNet/IP and Modbus TCP. Key features include dual 100BASE-TX PHYs with HP Auto-MDIX, an SPI host interface for the application MCU, 2/3 port switch capability, integrated 1.8 V/2.5 V/3.3 V I/O tolerance, hardware cable diagnostics and an industrial temperature range. The integrated PHYs eliminate two external transceiver ICs and the associated magnetics design, while Auto-MDIX allows direct or crossover cables interchangeably. Three ports enable line, ring or star network topologies natively on the chip. Architecturally, the LAN9252TI/PT pairs an EtherCAT IP core (Beckhoff-licensed ET1100-equivalent logic) with two 100 Mbps Ethernet PHY macros and a digital SPI/parallel bridge. The device supports distributed clocks (DC) with sub-microsecond synchronization, FMMU, SyncManager and watchdog functions defined by the EtherCAT specification. Internal FIFOs decouple EtherCAT traffic from the host MCU, allowing a low-cost MCU to control a high-performance fieldbus. Typical applications include servo/stepper drives, I/O modules, sensors and actuators on EtherCAT networks, programmable logic controllers (PLC) sub-modules, robotics joint controllers and CNC axes. Industrial designers value the LAN9252TI/PT because it shrinks a complete 2-port EtherCAT slave - including magnetics and termination - onto a small PCB that talks to a low-cost SPI MCU. Designers should route the 100BASE-TX differential pairs as controlled-impedance (100 ohm differential) traces and connect the center tap of each transformer through the integrated termination resistors. The exposed thermal pad must be soldered to a sufficient copper pour to dissipate the roughly 0.5-1 W typical dissipation under 100 Mbps full-duplex operation. DC and ripple on each analog supply pin must be kept below 50 mVpp to maintain EtherCAT conformance. This page consolidates distributor pricing, drop-in alternatives, and engineering design notes that go beyond what the manufacturer datasheet provides, including same-family Microchip options and cross-brand EtherCAT competitor context.

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LAN9252TV/ML

LAN9252TV/ML - 2/3-Port EtherCAT Controller | Microchip

The Microchip Technology LAN9252TV/ML is a 2/3-port EtherCAT slave controller with two integrated 100BASE-TX Ethernet PHYs, 100 Mbps operation, an SPI interface, and a 64-QFN 9 x 9 mm package. It combines EtherCAT processing with two full-duplex Ethernet transceivers to provide a compact Ethernet interface for industrial automation equipment. An EtherCAT slave controller, or ESC, is a dedicated semiconductor that manages EtherCAT datagrams and distributed-device communication. The LAN9252 belongs to the broader EtherCAT controller and network-interface IC hierarchy, combining protocol processing, Ethernet physical-layer transceivers, and host-register access in one device. Its two integrated PHYs support copper Ethernet links, while 100BASE-FX operation can be implemented through an external fiber transceiver. Each integrated Ethernet PHY contains a full-duplex 100BASE-TX transceiver capable of 100 Mbps 100BASE-TX operation. HP Auto-MDIX simplifies installation by supporting both direct and crossover LAN cables. The controller also provides the SPI interface identified for this device, allowing a host processor or microcontroller to access its control and status registers. The 64-QFN package supports compact integration into industrial control boards. The 2/3-port architecture is suitable for EtherCAT topologies in which a controller must participate in one or more network segments. Combining the ESC and two Ethernet PHYs reduces the number of separate interface components required on the board. A 100BASE-TX network operating at 100 Mbps is appropriate for cyclic industrial traffic, where deterministic device communication and compact integration are more important than maximum Ethernet line rate. Typical applications include servo drives, programmable logic controllers, industrial robots, machine-tool controllers, distributed I/O modules, and EtherCAT master or slave interface equipment. In these systems, the LAN9252 can connect local EtherCAT processing to copper Ethernet ports, while its register interface allows an embedded controller to configure ports, monitor link status, and exchange process data. Designers should use the manufacturer datasheet pin-description table when assigning PCB nets and should preserve the required Ethernet magnetics, decoupling, and exposed-pad layout. Thermal performance depends on the exposed pad, copper area, airflow, and the device's actual switching loss. Because this controller integrates high-speed digital processing and Ethernet transceivers, controlled-reference layout and uninterrupted ground connectivity are essential for reliable operation. This product page combines the manufacturer's functional description, package and interface data, official datasheet, and application-note migration information with practical comparison and design guidance. It identifies the key distinction between LAN9252-family devices and highlights where package matching alone is insufficient to establish true drop-in compatibility.

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LAN9252V/ML

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.

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LAN9253-I/R4X

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.

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LAN9253-V/R4X

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.

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LAN9253/R4X

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.

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LAN9253T-I/R4X

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.

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LAN9253T-V/R4X

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.

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LAN9253T/R4X

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.

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LAN9254-I/JRX

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.

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LAN9254-V/JRX

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.

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LAN9254/JRX

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.

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LAN9254T-I/JRX

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.

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LAN9254T/JRX

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.

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LAN9255-I/ZMX019

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.

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LAN9255-V/ZMX020

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.

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LAN9303-ABZJ

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.

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LAN9311-NU

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.

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LAN9311-NZW

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.

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LAN9311I-NZW

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.

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LAN9252T/PT - 2/3-Port EtherCAT Controller | Microchip

LAN9252TI/ML - 2/3-Port EtherCAT Controller | Microchip

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LAN9252V/ML - 2/3-Port EtherCAT Controller | Microchip

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LAN9253/R4X - 2/3-Port EtherCAT Controller | Microchip Technology

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LAN9253T-V/R4X 3-Port EtherCAT Controller | Microchip

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LAN9311-NZW - 2-Port 10/100 Ethernet Switch | Microchip

LAN9311I-NZW - 2-Port 10/100 Managed Ethernet Switch | Microchip Technology