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The LXT972A is an IEEE compliant Fast Ethernet PHY Transceiver that directly supports both 100BASE-TX and 10BASE-T applications. It provides a Media Independent Interface (MII) for easy attachment to 10/100 Media Access Controllers (MACs).

This document also supports the LXT972.

The LXT972A supports full-duplex operation at 10Mbps and 100Mbps. Its operating condition can be set using auto-negotiation, parallel detection, or manual control.

The LXT972A is fabricated with an advanced CMOS process and requires only a single 3.3V power supply.

Product Features

■ 3.3V Operation.

■ Low power consumption (300 mW typical).

■ 10BASE-T and 100BASE-TX using a single RJ-45 connection.

■ Supports auto-negotiation and parallel detection.

■ MII interface with extended register capability.

■ Robust baseline wander correction performance.

■ Standard CSMA/CD or full-duplex operation.

■ Configurable via MDIO serial port or hardware control pins.

■ Integrated, programmable LED drivers.

■ 64-pin Low-profile Quad Flat Package (LQFP).

—LXT972ALC - Commercial (0° to 70°C ambient).

Applications

■ Combination 10BASE-T/100BASE-TX Network Interface Cards (NICs)

■ 10/100 PCMCIA Cards

■ Cable Modems and Set-Top Boxes