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XRT73LC03A Datasheet(PDF) 2 Page - Exar Corporation |
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XRT73LC03A Datasheet(HTML) 2 Page - Exar Corporation |
2 / 61 page XRT73LC03A 2 3 CHANNEL DS3/E3/STS-1 LINE INTERFACE UNIT REV. 1.0.2 TYPICAL APPLICATIONS TRANSMIT INTERFACE CHARACTERISTICS: • Accepts either Single-Rail or Dual-Rail data from Terminal Equipment and generates a bipolar signal from the line • Integrated Pulse Shaping Circuit • Built-in B3ZS/HDB3 Encoder (which can be dis- abled) • Contains Transmit Clock Duty Cycle Correction Circuit on-chip • Generates pulses that comply with the ITU-T G.703 pulse template (E3 applications) • Generates pulses that comply with the DSX-3 pulse template as specified in Bellcore GR-499-CORE and ANSI T1.102_1993 • Generates pulses that comply with the STSX-1 pulse template as specified in Bellcore GR-253- CORE • Transmitter can be turned off in order to support redundancy designs RECEIVE INTERFACE CHARACTERISTICS: • Integrated Adaptive Receive Equalization (optional) and Timing Recovery • Declares and Clears the LOS defect per ITU-T G.775 requirements (E3 and DS3 applications) • Meets Jitter Tolerance Requirements as specified in ITU-T G.823_1993 (E3 Applications) • Meets Jitter Tolerance Requirements as specified in Bellcore GR-499-CORE (DS3 Applications) • Declares Loss of Signal (LOS) and Loss of Lock (LOL) Alarms • Built-in B3ZS/HDB3 Decoder (which can be dis- abled) • Recovered Data can be muted while the LOS Con- dition is declared • Outputs either Single-Rail or Dual-Rail data to the Terminal Equipment • Receiver can be powered down in order to con- serve power in redundancy designs FIGURE 2. MULTICHANNEL ATM APPLICATION ATM Switch/ SAR XRT74L73 RPOS RNEG RxLineClk XRT71D03 XRT73LC03 RRPOS RRNEG RRClk RPOS RNEG RxClk RPOS RNEG RxClk RTIP RRing TTIP TRing TPOS TNEG TxLineClk MClk TPOS TNEG TxClk 3 Channel E3/DS3 ATM UNI 3 Channel E3/DS3 J/A 3 Channel E3/DS3 LIU FIGURE 3. MULTISERVICE - FRAME RELAY APPLICATION Frame Relay XRT72L56 RPOS RNEG RxLineClk XRT71D03 XRT73LC03 RRPOS RRNEG RRClk RPOS RNEG RxClk RPOS RNEG RxClk RTIP RRing TTIP TRing TPOS TNEG TxLineClk MClk TPOS TNEG TxClk 6 Channel E3/DS3 Framer 2 x 3 Channel E3/DS3 J/A 2 x 3 Channel E3/DS3 LIU |
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