msm7719-01 Oki Semiconductor, msm7719-01 Datasheet

msm7719-01

Manufacturer Part Number

msm7719-01

Description

Echo Canceler With Adpcm Transcoder

Manufacturer

Oki Semiconductor

Datasheet

1.MSM7719-01.pdf (40 pages)

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E2U0058-18-85

¡ Semiconductor

MSM7719-01

Echo Canceler with ADPCM Transcoder

GENERAL DESCRIPTION

The MSM7719, developed for PHS (Personal Handyphone System) applications, is an LSI device

and contains a line echo canceler, an acoustic echo canceler (for handsfree conversation), and

a single channel full-duplex ADPCM transcoder.

This device includes DTMF tone and several types of tone generation, transmit/receive data mute

and gain control, and VOX function and is best suited for PHS applications.

FEATURES

• Single 5 V power supply

• ADPCM :

• PCM interface coding format :

• Built-in 2-channel (line and acoustic) echo canceler

• Serial PCM/ADPCM transmission data rate :

• Low supply current

• Master clock frequency :

• Transmit/receive mute, transmit/receive programmable gain control

• Built-in DTMF tone generator and various tones generator

• Control through parallel microcontroller interface

• Built-in VOX control

• Package:

100-pin plastic TQFP (TQFP100-P-1414-0.50-K) (Product name : MSM7719-01TS-K)

Line echo canceler

Acoustic echo canceler (for handsfree conversation)

Echo attenuation : 30 dB (typ.)

Cancelable echo delay time :

Operating mode :

Power-down mode :

Pin control available for line and acoustic echo cancelers

Transmit side :

Receive side :

27 ms (max.) for line echo canceler +27 ms (max.) for acoustic echo canceler

Line echo canceler mode only :

Voice/silence detect

Background noise generation at the absence of voice signal

ITU-T Recommendations G.726

Typically 50 mA (V

Typically 0.2 mA (V

9.6 to 10.0 MHz/19.2 to 20.0 MHz

-law

: 4.5 V to 5.5 V

54 ms (max.)

64 kbps to 2048 kbps

= 5.0 V)

This version: Aug. 1998

MSM7719-01

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