LAN9250I/PT

Controllers Overview

The LAN9250I/PT is a single-chip 10/100 Ethernet controller and PHY manufactured by Microchip Technology. It integrates an Ethernet MAC, HP Auto-MDIX PHY, and IEEE 1588v2 hardware timestamp unit. The device supports 10BASE-T and 100BASE-TX standards with full- and half-duplex operation. It features a 16-KByte FIFO for flexible TX/RX allocation and offers multiple host interfaces including SPI, Quad SPI, indexed register, and multiplexed bus modes. Operating on a single 3.3V supply via an integrated 1.2V regulator, it functions within an industrial temperature range of -40°C to +85°C.

Controllers Feature Summary

• Integrated Ethernet MAC and PHY with HP Auto-MDIX support
• IEEE 1588v2 hardware timestamping for precision time protocol
• Flexible host bus interface supporting SPI, Quad SPI, and parallel buses
• Comprehensive power management with Wake-on-LAN capabilities

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 ordering suffix 'I/PT' corresponds to the industrial temperature grade (-40°C to +85°C) and the 64-pin TQFP-EP package type. Confirm that the component meets RoHS compliance requirements as specified in the datasheet. Ensure the procurement source provides valid documentation referencing datasheet DS00001913C.

Controllers Selection Notes

Select this component when a low pin count solution is required for embedded applications. It is suitable for systems needing integrated checksum offload engines and large internal buffers to handle high latency. Consider the available host interface options, such as SPI or parallel bus, based on the target microcontroller's capabilities.

Controllers Part Context

This part belongs to the LAN9250 family of 10/100 Industrial Ethernet Controllers. It shares functional similarities with other variants like the LAN9250I/ML, differing primarily in package style. The series is designed for cost-effective integration of Ethernet connectivity into 8-bit and 16-bit embedded controllers.

Controllers Replacement Considerations

LAN9250I/ML (Same function, QFN-64 package)

Controllers FAQ

Does the LAN9250I/PT support fiber optic connections?

Yes, 100BASE-FX is supported via an external fiber transceiver connected through specific pins.

What is the purpose of the integrated 1.2V regulator?

It allows the device to operate from a single 3.3V power supply, simplifying the system design.

How does the device handle flow control?

It supports full-duplex flow control via PAUSE frames and half-duplex flow control via back-pressure generation.