LXT381 - Octal E1 Line Interface Note - Not recommended for new designs

The LXT381 is an octal short-haul Pulse Code Modulation (PCM) transceiver for use in 2.048 Mbps (E1) applications. It incorporates eight receivers and eight transmitters in a single 144-pin LQFP or 160 PBGA package. The LXT381 may be configured for unbalanced 75 ohm or for balanced 120 ohm systems without external component changes in the transmit section. The LXT381 features a differential data receiver architecture with high noise interference margin. The receivers use peak detection and a variable threshold for reliable data recovery down to 500 mV or up to 12 dB of cable attenuation.

Applications
  • SDH E1 tributary interfaces
  • Public switching trunk line interfaces
  • Digital Access Cross Connects (DACS)
  • Channel banks
  • Microwave transmission systems
    • Features and Benefits
  • Octal E1 short haul line interface per ITU G.703
  • Single rail supply voltage of 3.3V with 5V I/O capability
  • Low power consumption of <100 mW per channel (typ.)
  • 75 ohm/120 ohm TX operation without component changes
  • Transmit return loss complies with ETSI ETS 300 166
  • Cortina Hitless Protection Switching (HPS)
  • Driver short circuit current limiter (<50 mA RMS)
  • Differential receiver with 15dB of signal to noise interference margin
  • Data recovery with no need for external reference clock
  • Analog LOS detection per ITU G.775
  • Simple hardware control mode
  • JTAG Boundary Scan test port per IEEE 1149.4
  • Small footprint 144 pin LQFP or 160 pin PBGA package
    • Product Change Notifications
    PCN105028 - 01 Conversion to RoHS Compliant Products 2006-Apr-05
    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
    PCN0707-04.0 LXT360, LXT380, LXT384, LXT386 & LXT971; Manufacturing Site 2007-Jul-23
    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