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MSM7581 Datasheet ITU-T G.721 4ch ADPCM TRANSCODER

Manufacturer: OKI Electric

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General Description

The MSM7581 is an ADPCM transcoder which is used by the new digital cordless system.

It converts 64 kbps voice PCM serial data to 32 kbps ITU-T G.721 ADPCM serial data, and vice versa.

This device is consists of four systems with full-duplex voice data channels and a data-through mode.

Overview

E2U0032-28-82 ¡ Semiconductor MSM7581 ¡ Semiconductor ITU-T G.721 4ch ADPCM TRANSCODER This version: Aug.

1998 MSM7581 Previous version: Nov.

Key Features

  • Conforms to ITU-T G.721.
  • Built-in Full-duplex Transcoder with Four Data Channels.
  • PCM companding Law: A-law/µ -law selectable.
  • Serial PCM Data Transmission Speed: 64 kbps to 2048 kbps.
  • Serial ADPCM Data Transmission Speed: 32 kbps to 2048 kbps.
  • Hardware Reset.
  • ITU-T G.721 Optional Reset.
  • for each channel.
  • Power Down Control for each channel.
  • Decoder (ADPCM Æ PCM ) Mute Mode and PAD Mode for each channel.

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