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XRT75R06D Datasheet(PDF) 1 Page - Exar Corporation |
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XRT75R06D Datasheet(HTML) 1 Page - Exar Corporation |
1 / 105 page Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com áç áç áç áç XRT75R06D SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER DECEMBER 2004 REV. 1.0.0 GENERAL DESCRIPTION The XRT75R06D is a six channel fully integrated Line Interface Unit (LIU) featuring EXAR’s R3 Technology (Reconfigurable, Relayless, Redundancy) for E3/ DS3/STS-1 applications. The LIU incorporates 6 independent Receivers, Transmitters and Jitter Attenuators in a single 217 Lead BGA package. Each channel of the XRT75R06D can be independently configured to operate in E3 (34.368 MHz), DS3 (44.736 MHz) or STS-1 (51.84 MHz). Each transmitter can be turned off and tri-stated for redundancy support or for conserving power. The XRT75R06D’s differential receiver provides high noise interference margin and is able to receive data over 1000 feet of cable or with up to 12 dB of cable attenuation. The XRT75R06D incorporates an advanced crystal- less jitter attenuator per channel that can be selected either in the transmit or receive path. The jitter attenuator performance meets the ETSI TBR-24 and Bellcore GR-499 specifications. Also, the jitter attenuators can be used for clock smoothing in SONET STS-1 to DS-3 de-mapping. The XRT75R06D provides a Parallel Microprocessor Interface for programming and control. The XRT75R06D supports analog, remote and digital loop-backs. The device also has a built-in Pseudo Random Binary Sequence (PRBS) generator and detector with the ability to insert and detect single bit error for diagnostic purposes. APPLICATIONS • E3/DS3 Access Equipment • DSLAMs • Digital Cross Connect Systems • CSU/DSU Equipment • Routers • Fiber Optic Terminals FIGURE 1. BLOCK DIAGRAM OF THE XRT 75R06D ORDERING INFORMATION PART NUMBER PACKAGE OPERATING TEMPERATURE RANGE XRT75R06DIB 217 Lead BGA -40°C to +85°C XRT75R06D XRT75R06D Channel 5 Channel 0 Channel n... Device Monitor MTIP_n MRing_n DMO_n Timing Control Tx Pulse Shaping HDB3/ B3ZS Encoder Tx Control Jitter Attenuator MUX Line Driver Remote LoopBack HDB3/ B3ZS Decoder MUX AGC/ Equalizer Peak Detector LOS Detector Slicer Jitter Attenuator µProcessor Interface Local LoopBack Clock & Data Recovery Clock Synthesizer RD WR Addr[7:0] CS INT D[7:0] TxON TxClk_n TxPOS_n TxNEG_n RxClk_n RxPOS_n RxNEG/LCV_n RLOS_n RLOL_n RTIP_n RRing_n TTIP_n TRing_n CLKOUT_n SFM_en E3Clk DS3Clk STS-Clk/12M ICT Pmode RDY PCLK RESET |
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