W681511

Publication Release Date: January 2009

- 2 -

Revision A11

1. GENERAL DESCRIPTION

The

companding. The device is compliant with the ITU G.712 specification. It operates off of a single +5V

power supply and is available in 20-pin SOG package options. Functions performed include

digitization and reconstruction of voice signals, and band limiting and smoothing filters required for

PCM systems. The filters are compliant with ITU G.712 specification.

specified over the industrial temperature range of –40

°C to +85°C.

The

capable of driving 300

Ω loads differentially up to a level of 6.3V peak-to-peak. The analog section is

fully differential, reducing noise and improving the power supply rejection ratio. The data transfer

protocol supports both long-frame and short-frame synchronous communications for PCM

applications, and IDL and GCI communications for ISDN applications.

master clock rates between 256 kHz and 4.096 MHz, and an on-chip pre-scaler automatically

determines the division ratio for the required internal clock.

For fast evaluation and prototyping purposes, the

2. FEATURES

•

Single +5V power supply

•

Typical power dissipation of 25 mW,

power-down mode of 0.5

μW

•

Fully-differential analog circuit design

•

On-chip precision reference of 1.575 V for

a 0 dBm TLP at 600

Ω

•

Push-pull power amplifiers with external

gain adjustment with 300

Ω load capability

•

Seven master clock rates of 256 kHz to

4.096 MHz

•

Pin-selectable

μ-Law

and

A-Law

companding (compliant with ITU G.711)

•

CODEC A/D and D/A filtering compliant

with ITU G.712

•

Industrial temperature range (–40

°C to

+85

°C)

•

Package: 20-pin SOG

ApplIcations

•

Digital Telephone Systems

•

Central

Office

Equipment

(Gateways,

Switches, Routers)

•

PBX Systems (Gateways, Switches)

•

PABX/SOHO Systems

•

Local Loop card

•

SOHO Routers

•

VoIP Terminals

•

Enterprise Phones

•

ISDN Terminals

•

Analog line cards

•

Digital Voice Recorders