XRT73L02M Datasheet, PDF (4/46 Pages) Exar Corporation – TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT

XRT73L02M
TWO CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
REV. 1.0.0
TABLE OF CONTENTS
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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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