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XRT83SL28IV Datasheet(PDF) 1 Page - Exar Corporation |
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XRT83SL28IV Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 47 page  Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com xr XRT83SL28 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT APRIL 2005 REV. 1.0.0 GENERAL DESCRIPTION The XRT83SL28 is a fully integrated 8-channel E1 short-haul LIU which optimizes system cost and performance by offering key design features. The XRT83SL28 operates from a single 3.3V power supply. The LIU features are programmed through a standard serial microprocessor interface or hardware control. EXAR’s LIU has patented high impedance circuits that allow the transmitter outputs and receiver inputs to be high impedance when experiencing a power failure or when the LIU is powered off. Key design features within the LIU optimize 1:1 or 1+1 redundancy and non-intrusive monitoring applications to ensure reliability without using relays. Additional features include TAOS for transmit and receive, RLOS, LCV, AIS, DMO, and diagnostic loopback modes. APPLICATIONS • ISDN Primary Rate Interface • CSU/DSU E1 Interface • E1 LAN/WAN Routers • Public Switching Systems and PBX Interfaces • E1 Multiplexer and Channel Banks • Integrated Multi-Service Access Platforms (IMAPs) • Integrated Access Devices (IADs) • Inverse Multiplexing for ATM (IMA) Wireless Base Stations FIGURE 1. HOST MODE BLOCK DIAGRAM OF THE XRT83SL28 HDB3 Encoder Jitter Attenuator (Rx or Tx) Timing Control Tx Pulse Shaper HDB3 Decoder Clock & Data Recovery Peak Detector & Slicer Rx Equalizer AIS & LOS Detector Driver Monitor 1 of 8 Channels Test Serial Microprocessor Interface Clock Distribution Line Driver TCLK TPOS TNEG RCLK RPOS RNEG/LCV RTIP RRING TRING TTIP TxOE ICT DMO RLOS Remote Loopback Digital Loopback Analog Loopback |
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