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XRT91L31 Datasheet(PDF) 5 Page - Exar Corporation |
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XRT91L31 Datasheet(HTML) 5 Page - Exar Corporation |
5 / 41 page 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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