IDT82P20516BFBLANK datasheet(3/115 Pages) IDT

Part #	IDT82P20516BFBLANK

Description	16-Channel Short Haul E1 Line Interface Unit

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Manufacturer	IDT [Integrated Device Technology]

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Table of Contents

3

December 17, 2009

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

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