LXT974/975 - Fast Ethernet Quad Tansceiver Note - Not recommended for new designs; End-of-Life in process-see PCN

The LXT974 and LXT975 are four-port PHY Fast Ethernet Transceivers which support IEEE 802.3 physical layer applications at both 10 Mbps and 100 Mbps. They provide all of the active circuitry to interface four 802.3 Media Independent Interface (MII) compliant controllers to 10BASE-T and/or 100BASE-TX media. All four ports on the LXT974 provide a combination twisted-pair (TP) or pseudo-ECL (PECL) interface for a 10/100BASE-TX or 100BASE-FX connection.

Applications
  • 10/100-TX or 100BASE-FX Switches and multi-port NICs
  • LXT975 optimized for dual-high stacked modular RJ45 applications
    • Features and Benefits
  • Four independent IEEE 802.3-compliant 10BASE-T or 100BASE-TX ports
  • 100BASE-FX fiber-optic capable
  • Standard CSMA/CD or full-duplex operation
  • Supports auto-negotiation and legacy systems without auto-negotiation capability
  • Baseline wander correction
  • 100BASE-TX line performance over 130 meters
  • Configurable LED drivers and serial LED output
  • Configurable through MII serial port or via external control pins
    • Product Change Notifications
    PCN106766 - 02 Ethernet Phy, MAC, Framers, T1/E1, Legacy Phy and Framers - Product Marking and Packaging Change, Product Marking 2006-Oct-12
    PCN0107-02.1 Ethernet Phy, MAC, Framers, T1/E1, Legacy Phy and Framers - Product Marking Change 2007-Jan-24
    DCL200711-01 Early Shipments due to IT Shutdown and Conversion 2007-Nov-06
    DCL0108-01.0 Product Code Change 2008-Jan-04
    DCL200802-01.0 Cortina Systems, Inc. Products (Ethernet Phy, MAC, Framers, T1/E1, Transport and Legacy Phy, & EPON), DCL200802-01.0; FYI – Europe & Middle Eastern Region Orders and Payment Transition 2008-Feb-05
    PCN0308-04.0 Cortina Systems, Pack Change, Select QFP's 2008-Mar-25
    PCN0308-01.0 Cortina Systems, Product Marking Change, FYI 2008-Mar-13
    DCL200804-01 Cortina Systems, Inc. Products (Ethernet Phy, MAC, Framers, T1/E1, Transport and Legacy Phy, & EPON), ; FYI – Latin America Regions Order and Payment Transition, DCL200804-01 2008-Apr-14