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XRT91L30IQ Datasheet(PDF) 5 Page - Exar Corporation |
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XRT91L30IQ Datasheet(HTML) 5 Page - Exar Corporation |
5 / 40 page xr xr xr xr PRELIMINARY XRT91L30 STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER REV. P1.0.8 II 3.5 TRANSMIT PARALLEL INPUT TO SERIAL OUTPUT (PISO) ...................................................................... 25 FIGURE 15. SIMPLIFIED BLOCK DIAGRAM OF PISO ......................................................................................................................... 25 3.6 CLOCK MULTIPLIER UNIT (CMU) AND RE-TIMER ..................................................................................... 26 TABLE 14: CLOCK MULTIPLIER UNIT PERFORMANCE ....................................................................................................................... 26 3.7 LOOP TIMING AND CLOCK CONTROL ....................................................................................................... 27 TABLE 15: LOOP TIMING AND CLOCK RECOVERY CONFIGURATIONS ................................................................................................. 27 FIGURE 16. LOOP TIMING MODE USING INTERNAL CDR OR AN EXTERNAL RECOVERED CLOCK ....................................................... 28 3.8 TRANSMIT SERIAL OUTPUT CONTROL ..................................................................................................... 28 FIGURE 17. TRANSMIT SERIAL OUTPUT INTERFACE BLOCK .............................................................................................................. 28 4.0 DIAGNOSTIC FEATURES ................................................................................................................... 29 4.1 SERIAL REMOTE LOOPBACK ..................................................................................................................... 29 FIGURE 18. SERIAL REMOTE LOOPBACK......................................................................................................................................... 29 4.2 DIGITAL LOCAL LOOPBACK ....................................................................................................................... 29 FIGURE 19. DIGITAL LOCAL LOOPBACK........................................................................................................................................... 29 4.3 ANALOG LOCAL LOOPBACK ...................................................................................................................... 30 FIGURE 20. ANALOG LOCAL LOOPBACK .......................................................................................................................................... 30 4.4 SPLIT LOOPBACK ......................................................................................................................................... 30 FIGURE 21. SPLIT LOOPBACK......................................................................................................................................................... 30 4.5 EYE DIAGRAM ............................................................................................................................................... 31 FIGURE 22. TRANSMIT ELECTRICAL OUTPUT EYE DIAGRAM............................................................................................................. 31 4.6 SONET JITTER REQUIREMENTS ................................................................................................................. 31 4.6.1 JITTER TOLERANCE: ................................................................................................................................................ 31 FIGURE 23. GR-253 JITTER TOLERANCE MASK .............................................................................................................................. 32 FIGURE 24. XRT91L30 MEASURED JITTER TOLERANCE ................................................................................................................. 32 4.6.2 JITTER GENERATION................................................................................................................................................ 33 FIGURE 25. XRT91L30 MEASURED ELECTRICAL PHASE NOISE TRANSMIT JITTER GENERATION AT 622.08 MBPS STS-12/STM4 USING ’1010’ OUTPUT PATTERN................................................................................................................................................. 33 5.0 ELECTRICAL CHARACTERISTICS ................................................................................................... 34 ABSOLUTE MAXIMUM RATINGS .................................................................................................................. 34 ABSOLUTE MAXIMUM POWER AND INPUT/OUTPUT RATINGS ......................................................... 34 POWER AND CURRENT DC ELECTRICAL CHARACTERISTICS .................................................................... 34 ................................................................................................................................................................... 34 LVPECL AND LVTTL LOGIC SIGNAL DC ELECTRICAL CHARACTERISTICS...................................... 35 ORDERING INFORMATION .................................................................................................................. 36 PACKAGE DIMENSIONS ................................................................................................ 36 REVISION HISTORY ...................................................................................................................................... 37 |
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