MSM7731-01 Overview
The MSM7731 is an LSI device developed for portable, handsfree munication with built-in line echo canceler, acoustic echo canceler, and transmission signal noise canceler. Built-in to the voice signal interface is a linear CODEC for the analog interface on the acoustic-side, and a linear CODEC for the analog interface on the line-side. On the line-side, in addition to the analog interface, there is also a m-law...
MSM7731-01 Key Features
- Single 3 V power supply operation (2.7 V to 3.6 V)
- Built-in 2-channel (line and acoustic) echo canceler Echo attenuation : 35 dB (typ.) Cancelable echo delay time : Line e
- Tlined (max.) Acoustic echo canceler only : Tacoud = 59 ms (max.)
- Built-in transmission signal noise canceler Noise attenuation: 13 dB (typ.) for white noise 40 dB (typ.) for single tone
- Built-in 2-channel CODEC Synchronous transmission and reception enables full duplex operation
- Built-in analog input gain amp stage (max. gain = 30 dB)
- Analog output configuration: Push-pull drive (can drive a 1.2 kW load)
- Built-in transmit slope filter
- Digital interface coding formats: m-law PCM, 16-bit linear (2's plement)
- Digital interface sync formats: Normal-sync, short-frame-sync