CS6420-CS datasheet(1/52 Pages) CIRRUS

部件名	CS6420-CS

功能描述	FULL DUPLEX SPEAKERPHONE CHIP

PDF	52 Pages

Scroll/Zoom	100%

制造商	CIRRUS [Cirrus Logic]

网页	http://www.cirrus.com

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1 / 52 page

Preliminary Product Information

This document contains information for a new product.

Cirrus Logic reserves the right to modify this product without notice.

1

Copyright

Cirrus Logic, Inc.

Crystal Semiconductor Products Division

P.O. Box 17847, Austin, Texas 78760

(512) 445 7222 FAX: (512) 445 7581

http://www.crystal.com

CS6420

Full-Duplex Speakerphone Chip

Features

l Single-chip full-duplex hands-free operation

l Automatic gain control

l Optional 34 dB microphone preamplifier

l Integrated mute and volume control

l Integrated 80 dB IDR dual codec

l Speech-trained Network and Acoustic Echo

Cancellers

l Powerdown mode

l Microcontroller Interface

General Description

Most modern speakerphones use half-duplex operation,

which switches transmission between the far-end talker

and the speakerphone user. This is done because the

acoustic coupling between the speaker and microphone

is much higher in speakerphones than in handsets

where the coupling is mechanically suppressed.

The CS6420 enables full-duplex conversation with a sin-

gle-chip solution. The CS6420 can easily replace

existing half-duplex speakerphone ICs with a huge in-

crease in conversation quality.

The CS6420 consists of telephone & audio interfaces,

two codecs and an echo-cancelling DSP.

ORDERING INFORMATION

CS6420-CS

20-pin SOIC

CDB6420

Evaluation Board

BANDGAP

AO

DGND

NI

DATA

STROBE

DRDY

CLKI

CLKO

API

RST

Microcontroller Interface

NO

AVDD

DVDD

AVDD

NC4

NC3

NC2

NC1

AGND

0,6,9.5,12 dB

Σ

+

-

Pre-Emphasis

Network

Echo Canceller

Filter

0,6,9.5,12 dB

Σ

+

-

Filter

Echo Canceller

Acoustic

Pre-Emphasis

APO

MB

34 dB

1 k

Ω

2.12 V

3.5 V

Clock

Generation

JUN ‘97

DS205PP2

类似零件编号 - CS6420-CS

制造商	部件名	数据表	功能描述
Cirrus Logic	CS6422	873Kb / 48P	Enhanced Full-Duplex Speakerphone IC
	CS6422-CS	873Kb / 48P	Enhanced Full-Duplex Speakerphone IC
	CS6422-CSZ	873Kb / 48P	Enhanced Full-Duplex Speakerphone IC
	CS6422-IS	873Kb / 48P	Enhanced Full-Duplex Speakerphone IC
	CS6422-ISZ	873Kb / 48P	Enhanced Full-Duplex Speakerphone IC

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