T8531A Datasheet

IC型號(hào)：
T8531A
PDF描述：
T8531A/8532 Multichannel Programmable Codec Chip Set
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Preliminary Data Sheet

September 2001

T8531A/T8532 Multichannel Programmable

Codec Chip Set

Features

Few or no SLIC/codec interface components

required

Sigma-delta converters with dither noise reduction

Serial microcontroller control interface

Meets or exceeds ITU-T G.711鈥擥.712 and rele-

vant

Telcordia Technologies

鈩?/div>

requirements

Available in 64-pin MQFP and TQFP packages

Per-channel programmable gain and hybrid bal-

ance

Programmable termination impedances

Programmable

碌-law,

A-law, or linear PCM output

Tone plant:

鈥?DTMF generator

鈥?DTMF receiver

鈥?Caller ID generator

鈥?Call progress tones generator

Test utilities:

鈥?Automatic gain calibration

鈥?Tone generation

鈥?dc generation

鈥?dc measurement

鈥?Variance computation

鈥?Peak detection

Analog and digital loopbacks

Programmable time-slot assignment with bit offset

Low-noise, balanced, receive SLIC interface

General Description

The multichannel programmable codec chip set is

comprised of the T8531A 16-channel line card signal

processor and one or two custom T8532 octal A/D

and D/A converters. A ROM-coded tone plant, with

line-test and self-test utilities, is included on the sig-

nal processor. Together these devices achieve a

highly integrated and highly programmable multi-

channel voice codec solution.

Software is provided to compute the gain and filter

coefficients required to program the codec.

VTX (8)

VRTX (8)

VRP (8)

VRN (8)

T8532

OCTAL

A/D

D/A

PCM

INTERFACE

VTX (8)

VRTX (8)

VRP (8)

VRN (8)

T8532

OCTAL

A/D

D/A

T8531A

DIGITAL

SIGNAL

PROCESSOR

ASIC

CK16

MICROPROCESSOR

INTERFACE

5-3793i (F)

Figure 1. System Block Diagram

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