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XRT91L30IQ Datasheet(PDF) 4 Page - Exar Corporation

Part # XRT91L30IQ
Description  STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
Download  39 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT91L30IQ Datasheet(HTML) 4 Page - Exar Corporation

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XRT91L30
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REV. 1.0.1
STS-12/STM-4 OR STS-3/STM-1 SONET/SDH TRANSCEIVER
I
TABLE OF CONTENTS
GENERAL DESCRIPTION .................................................................................................1
APPLICATIONS ...........................................................................................................................................1
FIGURE 1. BLOCK DIAGRAM OF XRT91L30 ...................................................................................................................................... 1
FEATURES
......................................................................................................................................................2
FIGURE 2. 64 QFP PIN OUT OF THE XRT91L30 (TOP VIEW)............................................................................................................ 3
ORDERING INFORMATION .....................................................................................................................3
TABLE OF CONTENTS ............................................................................................................ I
PIN DESCRIPTIONS ..........................................................................................................4
.....................................................................................................................................................................4
HARDWARE CONTROL ....................................................................................................................................4
TRANSMITTER SECTION ..................................................................................................................................7
RECEIVER SECTION........................................................................................................................................9
POWER AND GROUND ..................................................................................................................................10
1.0 FUNCTIONAL DESCRIPTION .............................................................................................................12
1.1 STS-12/STM-4 AND STS-3/STM-1 MODE OF OPERATION ......................................................................... 12
1.2 CLOCK INPUT REFERENCE FOR CLOCK MULTIPLIER (SYNTHESIZER) UNIT ...................................... 12
TABLE 1: CMU REFERENCE FREQUENCY OPTIONS (DIFFERENTIAL OR SINGLE-ENDED) ................................................................... 12
1.3 DATA LATENCY ............................................................................................................................................. 12
TABLE 2: DATA INGRESS TO DATA EGRESS LATENCY ....................................................................................................................... 12
2.0 RECEIVE SECTION .............................................................................................................................13
2.1 RECEIVE SERIAL INPUT ............................................................................................................................... 13
FIGURE 3. RECEIVE SERIAL INPUT INTERFACE BLOCK ..................................................................................................................... 13
2.2 RECIEVE SERIAL DATA INPUT TIMING ...................................................................................................... 14
FIGURE 4. RECEIVE HIGH-SPEED SERIAL DATA INPUT TIMING DIAGRAM .......................................................................................... 14
TABLE 3: RECEIVE HIGH-SPEED SERIAL DATA INPUT TIMING (STS-12/STM-4 OPERATION) ............................................................. 14
TABLE 4: RECEIVE HIGH-SPEED SERIAL DATA INPUT TIMING (STS-3/STM-1 OPERATION) ............................................................... 14
2.3 RECEIVE CLOCK AND DATA RECOVERY .................................................................................................. 15
TABLE 5: CLOCK DATA RECOVERY UNIT REFERENCE CLOCK SETTINGS ............................................................................................ 15
TABLE 6: CLOCK AND DATA RECOVERY UNIT PERFORMANCE .......................................................................................................... 15
2.3.1 INTERNAL CLOCK AND DATA RECOVERY BYPASS ............................................................................................ 16
FIGURE 5. INTERNAL CLOCK AND DATA RECOVERY BYPASS............................................................................................................ 16
2.4 EXTERNAL RECEIVE LOOP FILTER CAPACITORS ................................................................................... 16
FIGURE 6. EXTERNAL LOOP FILTERS .............................................................................................................................................. 16
2.5 LOSS OF SIGNAL .......................................................................................................................................... 16
FIGURE 7. LOS DECLARATION CIRCUIT........................................................................................................................................... 17
2.6 SONET FRAME BOUNDARY DETECTION AND BYTE ALIGNMENT RECOVERY .................................... 17
2.7 RECEIVE SERIAL INPUT TO PARALLEL OUTPUT (SIPO) ......................................................................... 17
FIGURE 8. SIMPLIFIED BLOCK DIAGRAM OF SIPO ...........................................................................................................................18
2.8 RECEIVE PARALLEL OUTPUT INTERFACE ............................................................................................... 18
FIGURE 9. RECEIVE PARALLEL OUTPUT INTERFACE BLOCK ............................................................................................................. 18
2.9 DISABLE PARALLEL RECEIVE DATA OUTPUT UPON LOS ..................................................................... 18
2.10 RECEIVE PARALLEL DATA OUTPUT TIMING .......................................................................................... 19
FIGURE 10. RECEIVE PARALLEL OUTPUT TIMING ............................................................................................................................ 19
TABLE 7: RECEIVE PARALLEL DATA OUTPUT TIMING (STS-12/STM-4 OPERATION) ......................................................................... 19
TABLE 8: RECEIVE PARALLEL DATA OUTPUT TIMING (STS-3/STM-1 OPERATION) ........................................................................... 19
TABLE 9: PECL AND TTL RECEIVE OUTPUTS TIMING SPECIFICATION .............................................................................................. 20
3.0 TRANSMIT SECTION ..........................................................................................................................21
3.1 TRANSMIT PARALLEL INPUT INTERFACE ................................................................................................. 21
FIGURE 11. TRANSMIT PARALLEL INPUT INTERFACE BLOCK............................................................................................................. 21
3.2 TRANSMIT PARALLEL DATA INPUT TIMING .............................................................................................. 22
FIGURE 12. TRANSMIT PARALLEL INPUT TIMING .............................................................................................................................. 22
TABLE 10: TRANSMIT PARALLEL DATA INPUT TIMING (STS-12/STM-4 OPERATION)......................................................................... 22
TABLE 11: TRANSMIT PARALLEL DATA INPUT TIMING (STS-3/STM-1 OPERATION)........................................................................... 22
3.3 ALTERNATE TRANSMIT PARALLEL BUS CLOCK INPUT OPTION .......................................................... 23
FIGURE 13. ALTERNATE TRANSMIT PARALLEL INPUT INTERFACE BLOCK (PARALLEL CLOCK INPUT OPTION) ...................................... 23
3.4 ALTERNATE TRANSMIT PARALLEL DATA INPUT TIMING ....................................................................... 23
FIGURE 14. ALTERNATE TRANSMIT PARALLEL INPUT TIMING............................................................................................................ 23
TABLE 12: ALTERNATE TRANSMIT PARALLEL DATA INPUT TIMING (STS-12/STM-4 OPERATION) ...................................................... 24
TABLE 13: ALTERNATE TRANSMIT PARALLEL DATA INPUT TIMING (STS-3/STM-1 OPERATION). ....................................................... 24


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