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MSM7602 数据表 (PDF) - OKI electronic componets

MSM7602 Datasheet PDF - OKI electronic componets
部件名 MSM7602
下载  MSM7602 下载

文件大小   238.32 Kbytes
  29 Pages
制造商  OKI [OKI electronic componets]
网页  http://www.oki.com
标志 OKI - OKI electronic componets
功能描述 Echo Canceler

MSM7602 Datasheet (PDF)

Go To PDF Page 下载 数据表
MSM7602 Datasheet PDF - OKI electronic componets

部件名 MSM7602
下载  MSM7602 Click to download

文件大小   238.32 Kbytes
  29 Pages
制造商  OKI [OKI electronic componets]
网页  http://www.oki.com
标志 OKI - OKI electronic componets
功能描述 Echo Canceler

MSM7602 数据表 (HTML) - OKI electronic componets

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MSM7602 产品详情

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, the MSM7602 I/O interface supportsm-law PCM . The use of a single chip CODEC, 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 : 30 dB (typ.)

• Clock frequency : 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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