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MSM7718-01 - Echo Canceler with ADPCM CODEC

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.

Key Features

  • Single 3 V power supply VDD : 2.7 V to 3.6 V.
  • ADPCM : ITU-T Recommendations G.726 (32 kbps).
  • Full-Duplex single channel operation.
  • Transmit/receive synchronous mode.
  • PCM interface coding format : µ -law.
  • 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. ).
  • Serial PCM/ADPCM transmission data rate : 64 kbps to 2048 k.

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The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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E2U0052-18-86 ¡ Semiconductor MSM7718-01 ¡ 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 • Single 3 V power supply VDD : 2.7 V to 3.6 V • ADPCM : ITU-T Recommendations G.