The LXT971A 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). The LXT971A also provides a Low Voltage PECL (LVPECL) interface for use with 100BASE-FX fiber networks.

Product Features
■ 3.3V Operation.
■ Low power consumption (300 mW typical).
■ Low-power “Sleep” mode.
■ 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.
■ 100BASE-FX fiber-optic capable.
■ Standard CSMA/CD or full-duplex operation.
■ Supports JTAG boundary scan.
■ Configurable via MDIO serial port or hardware control pins.
■ Integrated, programmable LED drivers.
■ 64-ball Plastic Ball Grid Array (PBGA).
    — LXT971ABC - Commercial (0° to 70°C ambient).
    —LXT971ABE - Extended (-40° to 85°C ambient).
■ 64-pin Low-profile Quad Flat Package (LQFP).
    — LXT971ALC - Commercial (0° to 70°C ambient).
    — LXT971ALE - Extended (-40° to 85°C ambient).

APPLICATIONs
■ Combination 10BASE-T/100BASE-TX or 100BASE-FX Network Interface Cards (NICs)
■ 10/100 PCMCIA Cards
■ Cable Modems and Set-Top Boxes