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XRT83L314 Datasheet(PDF) 1 Page - Exar Corporation |
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XRT83L314 Datasheet(HTML) 1 Page - Exar Corporation |
1 / 84 page Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com XRT83L314 14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT MAY 2004 REV. 1.0.0 GENERAL DESCRIPTION The XRT83L314 is a fully integrated 14-channel long- haul and 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 components. 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 (8kHz, 1.544Mhz, 2.048Mhz, nxT1/J1, nxE1). 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 FIGURE 1. BLOCK DIAGRAM OF THE XRT83L314 HDB3/B8ZS Encoder Tx Jitter Attenuator Timing Control Tx Pulse Shaper & Pattern Gen HDB3/B8ZS Decoder Rx Jitter Attenuator Clock & Data Recovery Peak Detector & Slicer Rx Equalizer NLCD Detection NLCD Generation QRSS Generation & Detection Rx Equalizer Control AIS & LOS Detector Driver Monitor 1 of 14 Channels Test Microprocessor Interface Programmable Master Clock Synthesizer Line Driver Remote Loopback Digital Loopback Analog Loopback TCLK TPOS TNEG RCLK RPOS RNEG 8kHzOUT MCLKE1out MCLKT1out MCLKE1Nout MCLKT1Nout RTIP RRING TRING TTIP TxON RxON ICT RxTSEL TEST DMO RLOS |
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