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MSM7586-xx Datasheet pie/4 Shift QPSK MODEM/ADPCM CODEC

Manufacturer: OKI Electric

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General Description

The MSM7586 is a CMOS IC developed for use with digital cordless telephones.

The device provides a p/4 shift QPSK modem function and a CODEC function which performs transcoding between the voice band analog signal and 32 kbps ADPCM data.

The MSM7586 performs DTMF tone and several types of tone generation, transmit/receive data, mute and gain control, side-tone pass and its gain control, and VOX function.

Overview

E2U0034-28-82 ¡ Semiconductor MSM7586-01/03 ¡ Semiconductor p/4 Shift QPSK MODEM/ADPCM CODEC This version: Aug.

1998 MSM7586-01/03 Previous version: Nov.

Key Features

  • (p/4 Shift QPSK Modem Unit).
  • 384 kbps transmission speed.
  • Built-in root Nyquist digital filter for the baseband band limiter.
  • Built-in D/A converters for the analog outputs of the quadrature signal component I and Q.
  • The DC offset and gain can be adjusted with respect to the differential I and Q analog outputs.
  • Completely digitized p/4 shift QPSK demodulator system (ADPCM CODEC Unit).
  • ADPCM system: built-in ITU-T Recommendations G.726 (32kbps.

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