LXT380 - Octal E1 G.703 Transceiver Note - Not recommended for new designs

 

The LXT380 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. Controllable through either hardware or host mode (serial or parallel interface), the LXT380 exceeds the latest ETSI return loss recommendations. You can configure the LXT380 as a seven-channel transceiver for SDH tributary post cards with the additional channel configured as a G.772-compliant nonintrusive performance monitor. Cortina also offers "Hitless Protection Switching" (HPS), which incorporates fast tri-stateable drivers and a constant delay jitter attenuator. HPS helps you reduce system cost by eliminating costly mechanical relays and opto-isolators in 1+1 protection and redundancy applications. The switch over time from primary to backup board is less than 1us - more than 1,000 times faster than mechanical relays - and helps eliminate loss of frame synchronization. A maximum of 1 bit error is generated when HPS is used instead of relays, which can generate more than 6,000 bit errors. Analog and digital JTAG can also help reduce test costs by reducing test times. The LXT381 provides the same features, without support for nonintrusive performance monitoring or clock recovery.
Applications
  • E1 digital cross connects
  • SDH E1 tributary interfaces
  • Public switching trunk line interfaces
  • Microwave transmission systems
    • Features and Benefits
  • Octal E1 short haul transceiver 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
  • Cortina "Hitless Protection Switching" (HPS)
  • Driver short circuit current limiter (<50 mA RMS)
  • Transmit return loss exceeds ETSI ETS 300166
  • Selectable transmit pulse shape PLL
  • Per channel clock recovery
  • Selectable HDB3 line encoder/decoder
  • On chip secondary driver short circuit monitoring circuit
  • Provides protected monitoring points per ITU G.772
  • Analog/digital and remote loopback testing function
  • LOS per ITU G.775 and ETS 300 233 (selectable)
  • 8 bit parallel or 4 wire serial control interface
  • JTAG Boundary Scan test port per IEEE 1149.4
  • Small footprint 144 Pin LQFP and 160 Pin PBGA Packages
    • 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
    PCN0308-01.0 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