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XRT73L02MIV Datasheet(PDF) 4 Page - Exar Corporation |
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XRT73L02MIV Datasheet(HTML) 4 Page - Exar Corporation |
4 / 46 page XRT73L02M xr TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT REV. 1.0.0 IV TABLE OF CONTENTS GENERAL DESCRIPTION ............................................................................................... 1 FEATURES .................................................................................................................................................... 1 APPLICATIONS .............................................................................................................................................. 1 Figure 1. Block Diagram of the XRT73L02M ..................................................................................................... 2 TRANSMIT INTERFACE CHARACTERISTICS ...................................................................................................... 2 RECEIVE INTERFACE CHARACTERISTICS ........................................................................................................ 2 Figure 2. Pin Out of the XRT73L02M ................................................................................................................ 3 ORDERING INFORMATION ................................................................................................................... 3 TABLE OF CONTENTS .................................................................................................................................... I PIN DESCRIPTIONS (BY FUNCTION) ............................................................................ 4 TRANSMIT INTERFACE ................................................................................................................................... 4 RECEIVE INTERFACE ..................................................................................................................................... 6 CLOCK INTERFACE ........................................................................................................................................ 9 OPERATING MODE SELECT ......................................................................................................................... 10 CONTROL AND ALARM INTERFACE ............................................................................................................... 14 ANALOG POWER AND GROUND ................................................................................................................... 15 DIGITAL POWER AND GROUND ..................................................................................................................... 16 1.0 ELECTRICAL CHARACTERISTICS ................................................................................................. 17 TABLE 1: ABSOLUTE MAXIMUM RATINGS ............................................................................................................ 17 TABLE 2: DC ELECTRICAL CHARACTERISTICS: ................................................................................................... 17 2.0 TIMING CHARACTERISTICS ............................................................................................................ 18 Figure 3. Typical interface between terminal equipment and the XRT73L02M (dual-rail data) ...................... 18 Figure 4. Transmitter Terminal Input Timing ................................................................................................... 18 Figure 5. Receiver Data output and code violation timing .............................................................................. 19 Figure 6. Transmit Pulse Amplitude test circuit for E3, DS3 and STS-1 Rates ............................................... 20 3.0 LINE SIDE CHARACTERISTICS: ..................................................................................................... 20 3.1 E3 LINE SIDE PARAMETERS: ............................................................................................................................. 20 Figure 7. Pulse Mask for E3 (34.368 mbits/s) interface as per itu-t G.703 ..................................................... 20 TABLE 3: E3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS ........................... 21 Figure 8. Bellcore GR-253 CORE Transmit Output Pulse Template for SONET STS-1 Applications ............ 22 TABLE 4: STS-1 PULSE MASK EQUATIONS ........................................................................................................ 22 TABLE 5: STS-1 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS (GR-253) . 23 Figure 9. Transmit Ouput Pulse Template for DS3 as per Bellcore GR-499 .................................................. 23 TABLE 6: DS3 PULSE MASK EQUATIONS ........................................................................................................... 24 TABLE 7: DS3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS (GR-499) ..... 24 Figure 10. Microprocessor Serial Interface Structure ...................................................................................... 25 Figure 11. Timing Diagram for the Microprocessor Serial Interface ................................................................ 25 TABLE 8: MICROPROCESSOR SERIAL INTERFACE TIMINGS ( TA = 250C, VDD=3.3V± 5% AND LOAD = 10PF) ..... 26 FUNCTIONAL DESCRIPTION: ........................................................................................ 27 4.0 The Transmitter Section: ................................................................................................................. 27 Figure 12. Single-Rail or NRZ Data Format (Encoder and Decoder are Enabled) ......................................... 27 Figure 13. Dual-Rail Data Format (encoder and decoder are disabled) ......................................................... 27 4.0.1 Transmit Clock: .................................................................................................................................. 28 4.0.2 B3ZS/HDB3 Encoder: ......................................................................................................................... 28 Figure 14. B3ZS Encoding Format ................................................................................................................. 28 4.0.3 Transmit Pulse Shaper: ..................................................................................................................... 29 Figure 15. HDB3 Encoding Format ................................................................................................................. 29 4.0.4 Transmit Drive Monitor: ..................................................................................................................... 30 4.0.5 Transmitter Section On/Off: .............................................................................................................. 30 Figure 16. Transmit Driver Monitor set-up. ..................................................................................................... 30 5.0 The Receiver Section: ...................................................................................................................... 31 5.0.1 AGC/Equalizer: ................................................................................................................................... 31 |
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