Dual-Speed Fast Ethernet Transceiver

The LXT970A is an enhanced derivative of the LXT970 10/100 Mbps Fast Ethernet PHY Transceiver that supports selectable driver strength capabilities and link-loss criteria. The LXT970A supports 100BASE-TX, 10BASE-T, and 100BASE-FX applications. It provides a Media Independent Interface (MII) for easy attachment to 10/100 Media Access Controllers (MAC)s and a pseudo-ECL interface for use with 100BASE-FX fiber networks.

Product Features
■ IEEE 802.3 Compliant:
    —10BASE-T and 100BASE-TX using a single RJ-45 connection.
    —Supports auto-negotiation and parallel detection for legacy systems.
    —MII interface with extended register capability.
■ Robust baseline wander correction performance.
■ 100BASE-FX fiber optic capable.
■ Standard CSMA/CD or full-duplex operation.
■ Configurable via MII serial port or external control pins.
■ Configurable for DTE or switch applications.
■ CMOS process with single 5Vsupply operation with provision for interface to 3.3V MII bus.
■ Integrated LED drivers.
■ Integrated supply monitor and line disconnect during low supply fault.
■ Available in:
    —64-pin TQFP (LXT970ATC)
    —64-pin PQFP (LXT970AQC)
■ Commercial temperature range (0 - 70°C ambient).

Applications
■ Combination 10BASE-T/100BASE-TX Network Interface Cards (NICs)
■ 10/100 Switches, 10/100 Printservers
■ 100BASE-FX Network Interface Cards (NICs)