XRT91L31IQ(2006) 查看數據表（PDF） - Exar Corporation

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XRT91L31IQ
(Rev.:2006)

STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER

Exar Corporation 

xr

STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER

XRT91L31

REV. 1.0.2

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 REQUIREMENTS FOR REFERENCE CLOCK .................................................................................. 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

TABLE 16: XRT91L31 RECEIVER JITTER TOLERANCE PERFORMANCE............................................................................................. 32

FIGURE 24. XRT91L31 MEASURED JITTER TOLERANCE WITH 77.76MHZ REFERENCE CLOCK ......................................................... 32

FIGURE 25. XRT91L31 MEASURED JITTER TOLERANCE WITH 19.44MHZ REFERENCE CLOCK ......................................................... 33

4.6.2 JITTER TRANSFER .................................................................................................................................................... 33

FIGURE 26. XRT91L31 MEASURED JITTER TRANSFER WITH 77.76MHZ REFERENCE CLOCK ........................................................... 33

FIGURE 27. XRT91L31 MEASURED JITTER TRANSFER WITH 19.44MHZ REFERENCE CLOCK ........................................................... 34

4.6.3 JITTER GENERATION................................................................................................................................................ 34

TABLE 17: XRT91L31 OPTICAL JITTER GENERATION USING 223-1 PRBS PATTERN ........................................................................ 34

TABLE 18: XRT91L31 OPTICAL JITTER GENERATION USING 223-1 PRBS PATTERN USING ALTERNATE STANDARD FILTERS............. 34

5.0 ELECTRICAL CHARACTERISTICS ................................................................................................... 36

ABSOLUTE MAXIMUM RATINGS .................................................................................................................. 36

ABSOLUTE MAXIMUM POWER AND INPUT/OUTPUT RATINGS ......................................................... 36

POWER AND CURRENT DC ELECTRICAL CHARACTERISTICS.................................................................... 36

................................................................................................................................................................... 36

LVPECL AND LVTTL LOGIC SIGNAL DC ELECTRICAL CHARACTERISTICS...................................... 37

ORDERING INFORMATION .................................................................................................................. 38

PACKAGE DIMENSIONS ................................................................................................ 38

REVISION HISTORY ...................................................................................................................................... 39

II

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