MSM7719-01 Datasheet, PDF (1/40 Pages) OKI electronic componets – Echo Canceler with ADPCM Transcoder

E2U0058-18-85
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MSM7719-01
Echo Canceler with ADPCM Transcoder
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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 :
V_DD : 4.5 V to 5.5 V
ITU-T Recommendations G.726
• PCM interface coding format :
µ-law
• Built-in 2-channel (line and acoustic) echo canceler
Line echo canceler
Acoustic echo canceler (for handsfree conversation)
Echo attenuation : 30 dB (typ.)
Cancelable echo delay time :
27 ms (max.) for line echo canceler +27 ms (max.) for acoustic echo canceler
Line echo canceler mode only :
54 ms (max.)
• Serial PCM/ADPCM transmission data rate : 64 kbps to 2048 kbps
• Low supply current
Operating mode :
Power-down mode :
• Master clock frequency :
Typically 50 mA (V_DD = 5.0 V)
Typically 0.2 mA (V_DD = 5.0 V)
9.6 to 10.0 MHz/19.2 to 20.0 MHz
• Transmit/receive mute, transmit/receive programmable gain control
• Built-in DTMF tone generator and various tones generator
• Control through parallel microcontroller interface
Pin control available for line and acoustic echo cancelers
• Built-in VOX control
Transmit side :
Voice/silence detect
Receive side :
Background noise generation at the absence of voice signal
• Package:
100-pin plastic TQFP (TQFP100-P-1414-0.50-K) (Product name : MSM7719-01TS-K)
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