GS3241 datasheet(3/108 Pages) SEMTECH

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GS3241

Final Data Sheet

Rev.2

PDS-061444

September 2017

3 of 108

Semtech

Proprietary & Confidential

www.semtech.com

Revision History

Contents

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

1.1 GS3241 Pin Assignment ...................................................................................................................5

1.2 GS3241 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 Cable Equalizer ................................................................................................................................. 16

4.2.1 Cable Equalizer Bypass ...................................................................................................... 16

4.2.2 Upstream Launch Swing Compensation .................................................................... 16

4.2.3 Carrier Detect, Squelch Control, and Loss of Signal ............................................... 16

4.3 Serial Digital Re-timer (CDR) ........................................................................................................ 19

4.3.1 PLL Loop Bandwidth Control .......................................................................................... 20

4.3.2 Automatic and Manual Rate Detection....................................................................... 20

4.3.3 Lock Time ............................................................................................................................... 21

4.4 PRBS Checker .................................................................................................................................... 23

4.4.1 Timed PRBS Check Measurement Procedure............................................................ 23

4.4.2 Continuous PRBS Check Measurement Procedure................................................. 24

4.5 EYE Monitor ....................................................................................................................................... 27

4.5.1 Shape Scan and Measurement Time............................................................................ 28

4.5.2 Matrix-Scan and Shape-Scan Operation ..................................................................... 30

4.6 PRBS Generator ................................................................................................................................ 36

4.7 Output Drivers .................................................................................................................................. 39

4.7.1 Bypassed Re-timer Signal Output Control ................................................................. 39

4.7.2 Output Driver Polarity Inversion.................................................................................... 39

4.7.3 Output Driver Data Rate Selection................................................................................ 39

4.7.4 Amplitude and Pre-Emphasis Control ......................................................................... 40

Version

ECO

PCN

Date

Changes and/or Modifications

038575

—

September 2017

Updated Table 2-3.

037745

—

August 2017

Updated Host Initiated Device Reset. Added Device Power-up

Sequence and Output Driver Data Rate Selection sections.

034153

—

November 2016

New Document.

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