ACS8944T datasheet(21/24 Pages) SEMTECH

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ADVANCED COMMUNICATIONS

FINAL

DATASHEET

Revision 3/November 2006 © Semtech Corp.

Page 21

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ACS8944 JAM PLL

CMU

Clock Multiplier Unit

ESD

Electrostatic Discharge

ESR

Equivalent Series Resistance

HBM

Human Body Model

I/O

Input/Output

JAM PLL

Jitter Attenuating, Multiplying Phase

Locked Loop

LDO

Low Voltage Drop-out

LVCMOS

Low Voltage CMOS

LVDS

Low Voltage Differential Signal

LVPECL

Low Voltage (3.3 V) PECL

OC-3/12

Optical Carrier Signal Level 3/12

155.52 Mbps/ 622.08 Mbps

PECL

Positive Emitter Coupled Logic

PFD

Phase and Frequency Detector

PLL

Phase Locked Loop

POR

Power-On Reset

p-p

peak-to-peak

PWM

Pulse Width Modulated

rms

root-mean-square

RoHS

Restrictive Use of Certain Hazardous

Substances (directive)

SDH

Synchronous Digital Hierarchy

SEC

SDH/SONET Equipment Clock

SETS

Synchronous Equipment Timing source

SONET

Synchronous Optical Network

STM-1/4/16

Synchronous Transport Module Levels

1/4: 155.52 Mbps/ 622.08 Mbps/

2.488 Gbps (SDH)

STS-12

Synchronous Transport Signal Level: 12,

622.08 Mbps (SONET)

Unit Interval

uP (

µP)

Microprocessor

WEEE

Waste Electrical and Electronic

Equipment (directive)

VCO

Voltage Controlled Oscillator

[1] ETSI EN 300 462-7-1 v1.1.2 (06/2001)

Transmission and Multiplexing (TM); Generic

requirements for synchronization networks; Part 7-1:

Timing characteristics of slave clocks suitable for

synchronization supply to equipment in local node

applications

[2] ETSI EN 302 084 V1.1.1 (2000-02)

Transmission and Multiplexing (TM); The control of jitter

and wander in transport networks

[3] ITU-T G.812 (06/1998)

Timing requirements of slave clocks suitable for use as

node clocks in synchronization networks

[4] ITU-T G.813 (08/1996)

Timing characteristics of SDH equipment slave clocks

(SEC)

[5] ITU-T G.823 (03/2000)

The control of jitter and wander within digital networks

which are based on the 2048 kbit/s hierarchy

[6] ITU-T G.824 (03/2000)

The control of jitter and wander within digital networks

which are based on the 1544 kbit/s hierarchy

[7] ITU-T G.825 (03/2000)

The control of jitter and wander within digital networks

which are based on the Synchronous Digital Hierarchy

(SDH)

[8] Telcordia GR-253-CORE, Issue 3 (09/ 2000)

Synchronous Optical Network (SONET) Transport

Systems: Common Generic Criteria

[9] RoHS Directive 2002/95/EC: Directive 2002/95/EC

of the European Parliament and of the Council of 27

January 2003 on the restriction of the use of certain

hazardous substances in electrical and electronic

equipment

[10] Waste Electrical and Electronic Equipment (WEEE)

Directive (2002/96/EC): Directive 2002/96/EC of the

European Parliament and of the Council of 27 January

2003 on waste electrical and electronic equipment

(WEEE)

Abbreviations

References and Related Standards

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