IDT82P20516 查看數據表（PDF） - Integrated Device Technology

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IDT82P20516

16-Channel Short Haul E1 Line Interface Unit

Integrated Device Technology 

Table of Contents

TABLE OF CONTENTS ........................................................................................................................................................... 3

LIST OF TABLES .................................................................................................................................................................... 6

LIST OF FIGURES ................................................................................................................................................................... 7

FEATURES ............................................................................................................................................................................... 8

APPLICATIONS........................................................................................................................................................................ 9

DESCRIPTION.......................................................................................................................................................................... 9

BLOCK DIAGRAM ................................................................................................................................................................. 10

1 PIN ASSIGNMENT .......................................................................................................................................................... 11

2 PIN DESCRIPTION ......................................................................................................................................................... 12

3 FUNCTIONAL DESCRIPTION ........................................................................................................................................ 19

3.1 E1 MODE SELECTION ............................................................................................................................................ 19

3.2 RECEIVE PATH ....................................................................................................................................................... 19

3.2.1 Rx Termination ............................................................................................................................................ 19

3.2.1.1 Receive Differential Mode ........................................................................................................... 19

3.2.2 Equalizer ..................................................................................................................................................... 20

3.2.2.1 Line Monitor ................................................................................................................................ 21

3.2.2.2 Receive Sensitivity ...................................................................................................................... 21

3.2.3 Slicer ........................................................................................................................................................... 22

3.2.4 Rx Clock & Data Recovery ......................................................................................................................... 22

3.2.5 Decoder ...................................................................................................................................................... 22

3.2.6 Receive System Interface ........................................................................................................................... 22

3.2.7 Receiver Power Down ................................................................................................................................ 23

3.3 TRANSMIT PATH .................................................................................................................................................... 23

3.3.1 Transmit System Interface .......................................................................................................................... 23

3.3.2 Tx Clock Recovery ...................................................................................................................................... 24

3.3.3 Encoder ....................................................................................................................................................... 24

3.3.4 Waveform Shaper ....................................................................................................................................... 24

3.3.4.1 Preset Waveform Template ........................................................................................................ 24

3.3.4.2 User-Programmable Arbitrary Waveform .................................................................................... 25

3.3.5 Line Driver ................................................................................................................................................... 27

3.3.5.1 Transmit Over Current Protection ............................................................................................... 27

3.3.6 Tx Termination ............................................................................................................................................ 27

3.3.6.1 Transmit Differential Mode .......................................................................................................... 27

3.3.7 Transmitter Power Down ............................................................................................................................ 29

3.3.8 Output High-Z on TTIP and TRING ............................................................................................................ 29

3.4 JITTER ATTENUATOR (RJA & TJA) ....................................................................................................................... 30

3.5 DIAGNOSTIC FACILITIES ....................................................................................................................................... 31

3.5.1 Bipolar Violation (BPV) / Code Violation (CV) Detection and BPV Insertion .............................................. 31

Table of Contents

3

December 17, 2009

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