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XRT91L31 Datasheet(PDF) 5 Page - Exar Corporation

Part # XRT91L31
Description  STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT91L31 Datasheet(HTML) 5 Page - Exar Corporation

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XRT91L31
5
REV. 1.0.2
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
TABLE 15: ALTERNATE TRANSMIT PARALLEL DATA INPUT TIMING (STS-3/STM-1 OPERATION). ....................................................... 27
................................................................................................................................................................... 27
3.5 TRANSMIT PARALLEL INPUT TO SERIAL OUTPUT (PISO) ...................................................................... 27
FIGURE 15. SIMPLIFIED BLOCK DIAGRAM OF PISO ......................................................................................................................... 27
3.6 CLOCK MULTIPLIER UNIT (CMU) AND RE-TIMER ..................................................................................... 28
TABLE 16: CLOCK MULTIPLIER UNIT REQUIREMENTS FOR REFERENCE CLOCK .................................................................................. 28
3.7 LOOP TIMING AND CLOCK CONTROL ....................................................................................................... 29
TABLE 17: LOOP TIMING AND CLOCK RECOVERY CONFIGURATIONS ................................................................................................. 29
FIGURE 16. LOOP TIMING MODE USING INTERNAL CDR OR AN EXTERNAL RECOVERED CLOCK ....................................................... 30
3.8 TRANSMIT SERIAL OUTPUT CONTROL ..................................................................................................... 30
FIGURE 17. TRANSMIT SERIAL OUTPUT INTERFACE BLOCK .............................................................................................................. 30
4.0 DIAGNOSTIC FEATURES ................................................................................................................... 31
4.1 SERIAL REMOTE LOOPBACK ..................................................................................................................... 31
FIGURE 18. SERIAL REMOTE LOOPBACK......................................................................................................................................... 31
4.2 DIGITAL LOCAL LOOPBACK ....................................................................................................................... 31
FIGURE 19. DIGITAL LOCAL LOOPBACK........................................................................................................................................... 31
4.3 ANALOG LOCAL LOOPBACK ...................................................................................................................... 32
FIGURE 20. ANALOG LOCAL LOOPBACK .......................................................................................................................................... 32
4.4 SPLIT LOOPBACK ......................................................................................................................................... 32
FIGURE 21. SPLIT LOOPBACK......................................................................................................................................................... 32
4.5 EYE DIAGRAM ............................................................................................................................................... 33
FIGURE 22. TRANSMIT ELECTRICAL OUTPUT EYE DIAGRAM............................................................................................................. 33
4.6 SONET JITTER REQUIREMENTS ................................................................................................................. 33
4.6.1 JITTER TOLERANCE: ................................................................................................................................................ 33
FIGURE 23. GR-253 JITTER TOLERANCE MASK .............................................................................................................................. 34
TABLE 18: XRT91L31 RECEIVER JITTER TOLERANCE PERFORMANCE............................................................................................. 34
FIGURE 24. JITTER TOLERANCE FOR OC-12 WITH HIGH BANDWIDTH AND LOW BANDWIDTH SETTINGS ............................................ 35
FIGURE 25. JITTER TOLERANCE FOR OC-3 WITH HIGH BANDWIDTH AND LOW BANDWIDTH SETTINGS .............................................. 35
4.6.2 JITTER TRANSFER .................................................................................................................................................... 35
FIGURE 26. JITTER TRANSFER FOR OC-12 .................................................................................................................................... 36
FIGURE 27. JITTER TRANSFER FOR OC-3 ...................................................................................................................................... 36
4.6.3 JITTER GENERATION................................................................................................................................................ 36
TABLE 19: XRT91L31 OPTICAL JITTER GENERATION USING 223-1 PRBS PATTERN ........................................................................ 37
TABLE 20: XRT91L31 OPTICAL JITTER GENERATION USING 223-1 PRBS PATTERN USING ALTERNATE STANDARD FILTERS............. 37
5.0 ELECTRICAL CHARACTERISTICS ................................................................................................... 37
ABSOLUTE MAXIMUM RATINGS .................................................................................................................. 37
ABSOLUTE MAXIMUM POWER AND INPUT/OUTPUT RATINGS ......................................................... 37
POWER AND CURRENT DC ELECTRICAL CHARACTERISTICS .................................................................... 38
................................................................................................................................................................... 38
LVPECL AND LVTTL LOGIC SIGNAL DC ELECTRICAL CHARACTERISTICS...................................... 39
FIGURE 28. DIFFERENTIAL VOLTAGE SWING DEFINITIONS (INPUT OR OUTPUT) FOR CLOCK AND DATA................................................. 40
ORDERING INFORMATION .................................................................................................................. 40
PACKAGE DIMENSIONS ................................................................................................ 40
FIGURE 29. PACKAGE DIMENSIONS ................................................................................................................................................ 40
REVISION HISTORY ...................................................................................................................................... 41
TABLE 21: .................................................................................................................................................................................... 41


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