XRT83SL314 Datasheet | Exar

DESCRIPTION The XRT83SL314 is a fully integrated 14-channel short-haul line interface unit (LIU) that operates from a single 3.3V power supply. Using internal termination, the LIU provides one bill of materials to operate in T1, E1, or J1 mode independently on a per channel basis with minimum external ponents. The LIU features are programmed through a standard microprocessor interface. 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. The on-chip clock synthesizer generates T1/E1/J1 clock rates from a selectable external clock frequency and has five output clock references that can be used for external timing (8k Hz, 1.544Mhz, 2.048Mhz, nx T1/ J1, nx E1). FIGURE 1. BLOCK DIAGRAM OF THE XRT83SL314 Additional features include RLOS, a 16-bit LCV counter for each channel, AIS, QRSS generation/ detection, Network Loop Code generation/detection, TAOS, DMO, and diagnostic loopback modes. APPLICATIONS - - - - - - - - - - T1 Digital Cross Connects (DSX-1) ISDN Primary Rate Interface CSU/DSU E1/T1/J1 Interface T1/E1/J1 LAN/WAN Routers Public Switching Systems and PBX Interfaces T1/E1/J1 Multiplexer and Channel Banks Integrated Multi-Service Access Platforms (IMAPs) Integrated Access Devices (IADs) Inverse Multiplexing for ATM (IMA) Wireless Base Stations 1 of 14 Channels NLCD Generation Driver Monitor TCLK TPOS TNEG HDB3/B8ZS Encoder Tx Jitter Attenuator Timing Control Tx Pulse Shaper & Pattern Gen Line Driver TTIP TRING Analog Loopback Remote Loopback Digital Loopback QRSS Generation & Detection RCLK RPOS RNEG HDB3/B8ZS Decoder Rx Jitter Attenuator Clock & Data Recovery Peak Detector & Slicer Rx Equalizer RTIP RRING Rx Equalizer Control NLCD Detection AIS & LOS...