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XRT83VSH28IB Datasheet(PDF) 1 Page - Exar Corporation |
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XRT83VSH28IB Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 74 page  Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com PRELIMINARY XRT83VSH28 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT AUGUST 2006 REV. P1.0.0 GENERAL DESCRIPTION The XRT83VSH28 is a fully integrated 8-channel short-haul line interface unit (LIU) that operates from a 1.8V and a 3.3V power supply. Using internal termination, the LIU provides one bill of materials to operate in E1 75 Ω or 120Ω mode with minimum external components. The LIU features are programmed through a standard parallel or serial 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 an E1 clock reference. Additional features include RLOS, a 16-bit LCV counter for each channel, AIS, QRSS generation/ detection, TAOS, 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 FIGURE 1. BLOCK DIAGRAM OF THE XRT83VSH28 E1 LIU (HOST MODE) 1 of 8 channels, CHANNEL_n HW/ HOST WR_R/W RD_ DS ALE- AS CS RDY_ DTACK/ SDO INT SER_ PAR ICT TPOS_n/ TDATA_n TNEG_n/ CODES_n TCLK_n RCLK_n RNEG_n/ LCV_n RPOS_n/ RDATA_n RLOS_n RRING_n MASTER CLOCK SYNTHESIZER QRSS PATTERN GENERATOR DMO_n TTIP_n TRING_n TXON_n HDB3/ ENCODER TX/ RX JITTER ATTENUATOR TIMING CONTROL TX FILTER & PULSE SHAPER LINE DRIVER DRIVE MONITOR HDB3/ DECODER TX/ RX JITTER ATTENUATOR TIMING & DATA RECOVERY PEAK DETECTOR & SLICER QRSS DETECTOR AIS DETECTOR LOS DETECTOR µ PTS1 µ PTS2 D[7:0] µ PCLK/ SCLK A[7:0]/ SDI RESET MICROPROCESSOR / SERIAL INTERFACE CONTROLLER TEST MCLKE1 MCLKOUT TAOS RTIP_n Remote Loopback Digital Loopback Analog Loopback |
Similar Part No. - XRT83VSH28IB |
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Similar Description - XRT83VSH28IB |
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