GS3281 datasheet(3/97 Pages) SEMTECH

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GS3281

Final Data Sheet

Rev.7

PDS-061453

January 2019

3 of 97

Semtech

Proprietary & Confidential

www.semtech.com

Revision History

Contents

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

1.1 GS3281 Pin Assignment ...................................................................................................................5

1.2 GS3281 Pin Descriptions ..................................................................................................................6

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

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

2.2 DC Electrical Characteristics ........................................................................................................ 10

2.3 AC Electrical Characteristics ......................................................................................................... 12

3. Input/Output Circuits.................................................................................................................................. 14

4. Detailed Description.................................................................................................................................... 15

4.1 Device Description .......................................................................................................................... 15

4.1.1 Sleep Mode............................................................................................................................ 15

4.2 Trace Equalizer ................................................................................................................................. 16

4.2.1 Input Trace Equalization ................................................................................................... 16

4.2.2 Carrier Detect, and Loss of Signal.................................................................................. 17

4.3 Serial Digital Re-timer (CDR) ........................................................................................................ 18

4.3.1 PLL Loop Bandwidth Control .......................................................................................... 19

4.3.2 Automatic and Manual Rate Detection....................................................................... 19

4.3.3 Lock Time ............................................................................................................................... 20

4.4 PRBS Checker .................................................................................................................................... 22

4.4.1 Timed PRBS Check Measurement Procedure............................................................ 22

4.4.2 Continuous PRBS Check Measurement Procedure................................................. 23

4.5 EYE Monitor ....................................................................................................................................... 26

4.5.1 Shape Scan and Measurement Time............................................................................ 27

Version

ECO

PCN

Date

Changes and/or Modifications

044521

—

January 2019

Updated Table 2-1: Absolute Maximum Ratings and Table 5-3:

Control Register Descriptions.

043495

—

August 2018

Updated Table 5-4.

042508

—

July 2018

Updated Table 2-2, Section 4.7.5.2, Section 4.9.5.6, and Table 5-3.

041051

—

April 2018

Updated Section 4.9.5.6 and Section 5.

040343

—

January 2018

Updated Table 2-2, Section 4.2.2, Section 5.

038573

—

September 2017

Updated Section 4.3.2 and Section 5.

037774

—

August 2017

Added Device Power Up Sequence and Output Driver Data Rate

Selection sections. Updated Host Initiated Device Reset section,

and Section 6.1 Typical Application Circuit.

034284

—

November 2016

New Document.

GS3281 Datasheet(PDF) 3 Page - Semtech Corporation

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