Table of Contents

Revision 3/November 2006 © Semtech Corp.

Page 2

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ACS8944 JAM PLL

Section

Page

ADVANCED COMMUNICATIONS

FINAL

DATASHEET

Introduction................................................................................................................................................................................................ 1

Block Diagram............................................................................................................................................................................................ 1

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

Table of Contents ...................................................................................................................................................................................... 2

Pin Diagram ............................................................................................................................................................................................... 3

Pin Description........................................................................................................................................................................................... 3

Description ................................................................................................................................................................................................. 5

Input....................................................................................................................................................................................................5

Input Configuration ............................................................................................................................................................................5

Output .................................................................................................................................................................................................5

Voltage Controlled Oscillator.............................................................................................................................................................6

Jitter Filtering......................................................................................................................................................................................6

Jitter Filtering: Partnering with Semtech Line Card Protection Part ...............................................................................................6

Input Jitter Tolerance.........................................................................................................................................................................6

Jitter Transfer .....................................................................................................................................................................................6

Phase Noise Performance.................................................................................................................................................................7

Loop Filter Components ....................................................................................................................................................................7

Output Jitter........................................................................................................................................................................................8

System Reset .....................................................................................................................................................................................8

Layout Recommendations ................................................................................................................................................................8

Lock Detector .....................................................................................................................................................................................8

Applications ........................................................................................................................................................................................9

Application Schematic of Combined ACS8525 and ACS8944 .................................................................................................... 10

Electrical Specifications ......................................................................................................................................................................... 11

Maximum Ratings ........................................................................................................................................................................... 11

Operating Conditions ...................................................................................................................................................................... 11

Thermal Characteristics ................................................................................................................................................................. 12

AC Characteristics........................................................................................................................................................................... 12

DC Characteristics .......................................................................................................................................................................... 12

Input and Output Interface Terminations...................................................................................................................................... 14

Input/Output Timing ....................................................................................................................................................................... 14

Jitter Performance .......................................................................................................................................................................... 15

Package Information .............................................................................................................................................................................. 19

Thermal Conditions......................................................................................................................................................................... 20

References and Related Standards ...................................................................................................................................................... 21

Abbreviations .......................................................................................................................................................................................... 21

Trademark Acknowledgements ............................................................................................................................................................. 22

Revision Status/History ......................................................................................................................................................................... 22

Notes ....................................................................................................................................................................................................... 23

Ordering Information .............................................................................................................................................................................. 24

Disclaimers...................................................................................................................................................................................... 24

Contacts........................................................................................................................................................................................... 24

Table of Contents