Datasheet > MSM7602-011

MSM7602-011

更新时间： 2022-12-12 11:17:24

品牌	Logo	应用领域
冲电气 - OKI		/
页数	文件大小	规格书
29页	237K
描述
Echo Canceler

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数据手册

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MSM7602-011 数据手册

E2U0037-28-82

This version: Aug. 1998

Previous version: Nov. 1996

¡ Semiconductor

MSM7602

¡ Semiconductor

MSM7602

Echo Canceler

GENERAL DESCRIPTION

The MSM7602 is an improved version of the MSM7520 with the same basic configuration. The

MSM7602 uses a 19.2 MHz clock frequency to meet PHS, the 3 V power supply (2.7 V to 5.5 V),

and compact packaging. Also, this device adds the howling detecter control pins and main clook

output pins. (See the Appendix)

The MSM7602 is a low-power CMOS IC device for canceling echo (in an acoustic system or

telephone line) generated in a speech path.

Echo is canceled, in digital signal processing, by estimating the echo path and generating a

pseudo echo signal.

When used as an acoustic echo canceler, the device cancels the acoustic echo between the loud

speaker and the microphone which occurs during hands free communication such as with a

cellular phone or a conference system phone.

When used as a line echo canceler, the device cancels the line echo caused by impedance

mismatching in a hybrid.

In addition, the MSM7602 makes possible a quality conversation by controlling the noise level

and preventing howling with howling detector, double talk detector, attenuation function, and

a gain control function. The devise also controls the low level noise with a center clipping

function.

Further, theMSM7602I/Ointerfacesupportsm-lawPCM. TheuseofasinglechipCODEC, such

as the MSM7566/7704 (3 V) or MSM7543/7533 (5 V), allows an economic and efficient echo

canceler configuration.

FEATURES

• Handles both acoustic echoes and telephone line echoes.

• Cancelable echo delay time:

MSM7602-001................. For a single chip: 23 ms (max.)

MSM7602-011................. For a cascade connection (can also be used for a single chip)

Master chip: 23 ms (max.)

Slave chip: 31 ms (max.)

Cancelable up to 209 ms (1 master plus 6 slaves)

For a single chip: 23 ms (max.)

• Echo attenuation

• Clock frequency

: 30 dB (typ.)

: 19.2 MHz

External input and internal oscillator circuit are provided.

• Power supply voltage : 2.7 V to 5.5 V

• Package options:

28-pin plastic SSOP (SSOP28-P-485-0.65-K) (Product name : MSM7602-001GS-K)

56-pin plastic QFP

(QFP56-P-910-0.65-2K) (Product name : MSM7602-011GS-2K)

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与MSM7602-011相关器件

型号	品牌	描述	获取价格	数据表
MSM7602-011GS-2K	OKI	ISDN Echo Canceller, 1-Func, CMOS, PQFP56, 9 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-56	获取价格
MSM7603	OKI	Echo Canceler	获取价格
MSM7603B	OKI	Echo Canceler	获取价格
MSM7617	OKI	2-Channel Echo Canceler	获取价格
MSM7617-001GS-BK	OKI	ISDN Echo Canceller, 1-Func, CMOS, PQFP64, 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-64	获取价格
MSM7617-002GS-BK	OKI	ISDN Echo Canceller, 2-Func, CMOS, PQFP64, 14 X 14 MM, 0.80 MM PITCH, PLASTIC, QFP-64	获取价格