LAN9250I/ML

Controllers Overview

The LAN9250I/ML is a single-chip 16-bit industrial Ethernet controller and PHY manufactured by Microchip Technology. It integrates an Ethernet MAC and PHY compliant with IEEE 802.3, 802.3u, and 802.3az standards, supporting 10BASE-T and 100BASE-TX speeds. The device features a 16-KByte FIFO buffer, HP Auto-MDIX, and Wake on LAN capabilities. It includes an integrated IEEE 1588v2 hardware timestamp unit and supports host interfaces via indexed register access, multiplexed address/data bus, or SPI/Quad SPI. Operating voltage ranges from 1.8V to 3.3V for I/O, with an internal 1.2V regulator. It is housed in a 64-pin QFN package and rated for industrial temperatures from -40°C to +85°C.

Controllers Feature Summary

• Integrates Ethernet MAC and PHY with automatic flow control and checksum offload engines
• Supports flexible host bus interfaces including indexed registers, multiplexed bus, and SPI/Quad SPI
• Includes IEEE 1588v2 precision time protocol hardware timestamping unit
• Features comprehensive power management with multiple wake-on-LAN triggers

Controllers Applications

• Industrial automation systems
• Cable, satellite, and IP set-top boxes
• Digital televisions and video recorders
• VoIP and video phone systems
• Home gateways and test/measurement equipment

Controllers Procurement Notes

Verify the specific suffix 'I' indicates the industrial temperature range (-40°C to +85°C) as per Microchip documentation. Confirm the package type matches the required PCB footprint, typically 64-QFN. Ensure compatibility with the host system's voltage levels and interface requirements (SPI vs. parallel bus). Check for any recent Product Change Notifications regarding assembly sites or materials.

Controllers Selection Notes

Select the LAN9250I/ML when a 16-bit embedded controller requires a cost-effective, single-chip Ethernet solution with industrial temperature ratings. Consider this component if the design benefits from integrated IEEE 1588v2 timestamping or requires low pin count via SPI interface. Evaluate power consumption against the integrated 1.2V regulator versus external regulation options for extended temperature variants.

Controllers Part Context

The LAN9250 belongs to Microchip's family of 10/100 Ethernet controllers designed for embedded applications. It serves as a bridge between host processors and Ethernet networks, combining MAC and PHY functions. The 'I' suffix denotes the industrial temperature grade, distinguishing it from commercial variants like the LAN9250/ML. It is often used in conjunction with external magnetics and crystals for complete network node implementations.

Controllers Replacement Considerations

Direct replacements within the same package and feature set are limited. The LAN9250/ML is the commercial temperature variant. For multi-port solutions, consider the LAN9252 or LAN9253 series. Verify pinout and register compatibility before substituting with other Microchip Ethernet controllers.