GS2985 Multi-Rate SDI Reclocker with Equalization &

De-emphasis

Data Sheet

36663 - 5

July 2012

4 of 45

Proprietary & Confidential

Contents

Features.................................................................................................................................................................1

Applications.........................................................................................................................................................1

Description...........................................................................................................................................................1

Revision History .................................................................................................................................................2

1. Pin Out...............................................................................................................................................................5

1.1 Pin Assignment ..................................................................................................................................5

1.2 Pin Descriptions ................................................................................................................................6

2. Electrical Characteristics ............................................................................................................................9

2.1 Absolute Maximum Ratings ..........................................................................................................9

2.2 DC Electrical Characteristics ........................................................................................................9

2.3 AC Electrical Characteristics ..................................................................................................... 10

3. Input/Output Circuits ............................................................................................................................... 13

4. Detailed Description.................................................................................................................................. 18

4.1 Serial Data Input ............................................................................................................................ 18

4.2 Modes of Operation ...................................................................................................................... 18

4.3 Input Trace Equalization ............................................................................................................. 18

4.4 4:1 Input Mux .................................................................................................................................. 19

4.5 Crystal Buffer .................................................................................................................................. 20

4.6 LOS (Loss Of Signal) Detection .................................................................................................. 20

4.7 Serial Digital Reclocker ............................................................................................................... 21

4.8 Lock Detection ................................................................................................................................ 21

4.8.1 Lock Detect and Asynchronous Lock ......................................................................... 22

4.9 Serial Data Output ......................................................................................................................... 22

4.9.1 Output Signal Interface Levels...................................................................................... 22

4.9.2 Adjustable Output Swing................................................................................................ 22

4.9.3 Output De-emphasis ........................................................................................................22

4.10 Automatic and Manual Data Rate Selection ...................................................................... 23

4.11 SD/HD Indication ........................................................................................................................ 24

4.12 Bypass Mode ................................................................................................................................. 25

4.13 DVB-ASI ......................................................................................................................................... 25

4.14 Output Mute and Data/Clock Output Selection ............................................................... 25

4.15 Host Interface ............................................................................................................................... 26

4.15.1 Introduction ...................................................................................................................... 26

4.15.2 Legacy Mode & Start-up................................................................................................ 26

4.15.3 Host Interface Mode & Start-up.................................................................................. 26

4.15.4 Clock & Data Timing....................................................................................................... 27

4.15.5 Single Device Operation............................................................................................... 27

4.15.6 Write Operation - Single Device ................................................................................ 28

4.15.7 Read Operation - Single Device ................................................................................. 28

4.15.8 Daisy Chain Operation.................................................................................................. 31

4.15.9 Read & Write Operation - Daisy Chained Devices............................................... 32

4.15.10 Writing to all Devices ..................................................................................................32