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MSM7718-01TS-K Datasheet

  • MSM7718-01TS-K

  • Echo Canceler with ADPCM CODEC

  • 38頁

  • OKI

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E2U0052-18-86
隆 Semiconductor
MSM7718-01
隆 Semiconductor
Echo Canceler with ADPCM CODEC
This version: Aug. 1998
MSM7718-01
GENERAL DESCRIPTION
The MSM7718, developed for PHS (Personal Handyphone System) applications, is a CMOS LSI
device and contains a line echo canceler and a single channel full-duplex ADPCM transcoder
that performs interconversion between voice-band analog signal and 32 kbps ADPCM data.
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 master telephones in PHS applications.
FEATURES
鈥?Single 3 V power supply
V
DD
: 2.7 V to 3.6 V
鈥?ADPCM :
ITU-T Recommendations G.726 (32 kbps)
鈥?Full-Duplex single channel operation
鈥?Transmit/receive synchronous mode
鈥?PCM interface coding format :
碌-law
鈥?Built-in line echo canceler
Echo attenuation : 30 dB (typ.)
Cancelable echo delay time :
Normal speech mode :
23 ms (max.)
Line echo canceler expansion mode : 54 ms (max.)
鈥?Serial PCM/ADPCM transmission data rate : 64 kbps to 2048 kbps
鈥?Low power consumption
Operating mode :
Typically 66 mW (V
DD
= 3.0 V)
Power-down mode :
Typically 0.3 mW (V
DD
= 3.0 V)
鈥?Two analog input gain adjustable amplifier stages
鈥?Analog output stage :
Push-pull drive, (direct drive of 350
W
+ 120 nF)
鈥?Master clock frequency :
9.600/19.200 MHz
鈥?Transmit/receive mute, transmit/receive programmable gain control
鈥?Built-in DTMF tone generator and various ringing tones generator
鈥?DTMF tone and call progress tone detection
鈥?Serial MCU interface control
鈥?Built-in VOX control
Transmit side :
Voice/silence detect
Receive side :
Background noise generation at the absence of voice signal
鈥?Built-in 2100 Hz tone detection (bidirectional)
鈥?Package:
100-pin plastic TQFP (TQFP100-1414-0.50-K) (Product name : MSM7718-01TS-K)
1/38

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