msm7719-01 Oki Semiconductor, msm7719-01 Datasheet
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msm7719-01
Manufacturer Part Number
msm7719-01
Description
Echo Canceler With Adpcm Transcoder
Manufacturer
Oki Semiconductor
Datasheet
1.MSM7719-01.pdf
(40 pages)
E2U0058-18-85
¡ Semiconductor
¡ 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
V
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
DD
: 4.5 V to 5.5 V
54 ms (max.)
64 kbps to 2048 kbps
DD
DD
= 5.0 V)
= 5.0 V)
This version: Aug. 1998
MSM7719-01
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