STANDARD PRODUCT
DATA SHEET
PMC-1970624
ISSUE 10
PM4351 COMET
COMBINED E1/T1 TRANSCEIVER
CONTENTS
1 FEATURES .............................................................................................. 1
1.1 Receiver section:........................................................................... 2
1.2 Transmitter section: ....................................................................... 4
2 APPLICATIONS ....................................................................................... 6
3 REFERENCES......................................................................................... 7
4 APPLICATION EXAMPLE.......................................................................11
5 BLOCK DIAGRAM ................................................................................. 13
6 DESCRIPTION ...................................................................................... 14
7 PIN DIAGRAMs...................................................................................... 17
8 PIN DESCRIPTION................................................................................ 19
9 FUNCTIONAL DESCRIPTION............................................................... 32
9.1 Receive Interface ........................................................................ 32
9.2 Clock and Data Recovery (CDRC) .............................................. 35
9.3 T1 Framer ................................................................................... 38
9.4 E1 Framer ................................................................................... 39
9.5 T1 Inband Loopback Code Detector (IBCD) ............................... 47
9.6 T1 Pulse Density Violation Detector (PDVD)............................... 47
9.7 Performance Monitor Counters (PMON) ..................................... 47
9.8 T1 Bit Oriented Code Detector (RBOC) ...................................... 48
9.9 HDLC Receiver (RDLC) .............................................................. 48
9.10 T1 Alarm Integrator (ALMI).......................................................... 49
9.11 Receive Elastic Store (RX-ELST) ................................................ 50
PROPRIETARY AND CONFIDENTIAL
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