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XRT75L03 Datasheet(PDF) 4 Page - Exar Corporation |
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XRT75L03 Datasheet(HTML) 4 Page - Exar Corporation |
4 / 92 page ![]() XRT75L03 REV. 1.0.4 THREE CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH JITTER ATTENUATOR I TABLE OF CONTENTS GENERAL DESCRIPTION ............................................................................................... 1 FEATURES .................................................................................................................................................... 1 APPLICATIONS .............................................................................................................................................. 1 TRANSMIT INTERFACE CHARACTERISTICS ...................................................................................................... 2 RECEIVE INTERFACE CHARACTERISTICS ........................................................................................................ 2 Figure 1. Block Diagram of the XRT 75L03 ...................................................................................................... 2 Figure 2. Pin Out of the XRT75L03 ................................................................................................................... 3 ORDERING INFORMATION ................................................................................................................... 3 TABLE OF CONTENTS .................................................................................................................................... I PIN DESCRIPTIONS (BY FUNCTION) ............................................................................. 4 SYSTEM-SIDE TRANSMIT INPUT AND TRANSMIT CONTROL PINS ...................................................................... 4 TRANSMIT LINE SIDE PINS ............................................................................................................................ 8 SYSTEM-SIDE RECEIVE OUTPUT AND RECEIVE CONTROL PINS .................................................................... 10 RECEIVE LINE SIDE PINS ............................................................................................................................ 17 CLOCK INTERFACE ...................................................................................................................................... 18 GENERAL CONTROL PINS ........................................................................................................................... 19 CONTROL AND ALARM INTERFACE ............................................................................................................... 21 JITTER ATTENUATOR INTERFACE ................................................................................................................. 21 POWER SUPPLY AND GROUND PINS ............................................................................................................ 24 XRT75L03 PIN LISTING IN NUMERICAL ORDER ........................................................................................... 26 1.0 ELECTRICAL CHARACTERISTICS ................................................................................................. 31 TABLE 1: ABSOLUTE MAXIMUM RATINGS ............................................................................................................ 31 TABLE 2: DC ELECTRICAL CHARACTERISTICS: ................................................................................................... 31 2.0 TIMING CHARACTERISTICS ............................................................................................................ 32 Figure 3. Typical interface between terminal equipment and the XRT75L03 (dual-rail data) ......................... 32 Figure 4. Transmitter Terminal Input Timing ................................................................................................... 32 Figure 5. Receiver Data output and code violation timing .............................................................................. 33 Figure 6. Transmit Pulse Amplitude test circuit for E3, DS3 and STS-1 Rates ............................................... 33 3.0 LINE SIDE CHARACTERISTICS: ..................................................................................................... 34 3.1 E3 LINE SIDE PARAMETERS: ............................................................................................................................. 34 Figure 7. Pulse Mask for E3 (34.368 mbits/s) interface as per itu-t G.703 ..................................................... 34 TABLE 3: E3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS ........................... 35 Figure 8. Bellcore GR-253 CORE Transmit Output Pulse Template for SONET STS-1 Applications ............ 36 TABLE 4: STS-1 PULSE MASK EQUATIONS ........................................................................................................ 36 TABLE 5: STS-1 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS (GR-253) . 37 Figure 9. Transmit Ouput Pulse Template for DS3 as per Bellcore GR-499 .................................................. 37 TABLE 6: DS3 PULSE MASK EQUATIONS ........................................................................................................... 38 TABLE 7: DS3 TRANSMITTER LINE SIDE OUTPUT AND RECEIVER LINE SIDE INPUT SPECIFICATIONS (GR-499) ..... 38 Figure 10. Microprocessor Serial Interface Structure ...................................................................................... 39 Figure 11. Timing Diagram for the Microprocessor Serial Interface ................................................................ 39 TABLE 8: MICROPROCESSOR SERIAL INTERFACE TIMINGS ( TA = 250C, VDD=3.3V± 5% AND LOAD = 10PF) ..... 39 FUNCTIONAL DESCRIPTION: ........................................................................................ 41 4.0 The Transmitter Section: ................................................................................................................. 41 Figure 12. Single-Rail or NRZ Data Format (Encoder and Decoder are Enabled) ......................................... 41 Figure 13. Dual-Rail Data Format (encoder and decoder are disabled) ......................................................... 41 4.1 TRANSMIT CLOCK: ........................................................................................................................................... 42 4.2 B3ZS/HDB3 ENCODER: .................................................................................................................................. 42 4.2.1 B3ZS Encoding: ................................................................................................................................. 42 4.2.2 HDB3 Encoding: ................................................................................................................................. 42 Figure 14. B3ZS Encoding Format ................................................................................................................. 42 Figure 15. HDB3 Encoding Format ................................................................................................................. 42 4.3 TRANSMIT PULSE SHAPER: .............................................................................................................................. 43 4.3.1 Guidelines for using Transmit Build Out Circuit: ............................................................................ 43 |