LAN9250/ML

Controllers Overview

The LAN9250/ML is a single-chip 16-bit industrial Ethernet controller and PHY designed for embedded applications. It integrates an Ethernet MAC and PHY compliant with IEEE 802.3, 802.3u, and 802.3az standards. The device supports 10BASE-T and 100BASE-TX speeds, with 100BASE-FX support via external transceivers. Key features include HP Auto-MDIX, IEEE 1588v2 hardware timestamping, and Wake on LAN (WoL). It offers flexible host interfaces: indexed register access, multiplexed address/data bus, and SPI/Quad SPI. The component operates on a single 3.3V supply using an integrated 1.2V regulator and is housed in a 64-pin QFN package.

Controllers Feature Summary

• Integrated Ethernet MAC and PHY supporting 10/100 Mbps speeds with automatic polarity detection and correction.
• Flexible host bus interface options including indexed registers, multiplexed bus, and SPI/Quad SPI modes.
• IEEE 1588v2 precision time protocol support with global tunable clock and programmable hardware timestamping.
• Comprehensive power management capabilities including multiple power-down levels and various wake-on-LAN triggers.

Controllers Applications

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

Controllers Procurement Notes

Verify the specific temperature grade suffix required for the application, as the LAN9250 family includes commercial, industrial, and extended industrial variants. Confirm that the 64-VFQFN package with exposed pad matches the PCB footprint design. Ensure the host system voltage logic aligns with the device's 1.8V to 3.3V variable I/O specifications before finalizing the order.

Controllers Selection Notes

Select the LAN9250/ML when a 16-bit host interface or SPI connectivity is required for industrial Ethernet control. This component is suitable for designs needing integrated checksum offloading and large FIFO buffers to handle high-latency applications. Consider the integrated 1.2V regulator for simplified power supply design, or disable it if an external regulator is preferred for lower power dissipation in extended temperature ranges.

Controllers Part Context

The LAN9250 belongs to Microchip's 10/100 Industrial Ethernet Controller family. It shares architectural similarities with the LAN9252 but lacks EtherCAT-specific hardware acceleration. The device is designed to replace discrete MAC and PHY solutions, reducing board space and component count. It is commonly used in conjunction with development tools like the EV83U94A evaluation board for system integration and testing.

Controllers Replacement Considerations

LAN9250I/ML

Controllers FAQ

Does the LAN9250 support fiber optic connections?

Yes, the LAN9250 supports 100BASE-FX via an external fiber transceiver connected through dedicated pins.

What is the maximum clock rate for the SPI interface?

The SPI/Quad SPI client supports clock rates of up to 80 MHz.

Can the internal regulator be disabled?

Yes, the integrated 3.3V to 1.2V linear regulator can be optionally disabled to allow the use of an external high-efficiency regulator.