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參數(shù)資料
| 型號： | MSM7731-01 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 元件分類： | Codec |
| 英文描述： | Multifunction PCM CODEC (Voice Signal Processor) |
| 中文描述： | 多功能的PCM編解碼器（語音信號處理器） |
| 文件頁數(shù)： | 1/43頁 |
| 文件大?。?/td> | 247K |
| 代理商： | MSM7731-01 |
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Semiconductor
MSM7731-01
Multifunction PCM CODEC (Voice Signal Processor)
GENERAL DESCRIPTION
The MSM7731 is an LSI device developed for portable, handsfree communication 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 PCM/16-bit linear digital interface.
Equipped with gain and mute controls for data transmission and reception, a
m
-law PCM/16-
bit linear digital interface for memo recording and message output, and transfer clock and sync
clock generators for digital communication, this device is ideally suited for a handsfree system.
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 echo canceler + acoustic echo canceler : Tlined = 27 ms (max.),
Tacoud = 59 ms – Tlined (max.)
Tacoud = 59 ms (max.)
Acoustic echo canceler only :
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 k
W
load)
Built-in transmit slope filter
Digital interface coding formats:
Digital interface sync formats:
Built-in digital transmission clock generators
Sync clock (SYNC):
Transmission clock (BCLK):
m
-law PCM, 16-bit linear (2's complement)
Normal-sync, short-frame-sync
8 kHz output
64 kHz output (
m
-law PCM)/128 kHz
output (16-bit linear)
Digital transmission rate
External input:
Internal generation:
Fixed digital interface sync clock (SYNC) enables automatic power-down
Master clock frequency: 19.2 MHz
Compatible with crystal oscillator and crystal
Low power consumption
Operating mode:
Power-down mode:
Control by both the serial microcomputer interface and parallel port is possible
Transmit/receive mute function, transmit/receive programmable gain setting
Package: 64-pin plastic QFP (QFP64-P-1414-0.80-BK) (Product name: MSM7731-01GA)
64 kbps to 2048 kbps
64 kbps (
m
-law PCM)/128 kbps (16-bit linear)
typ. 105mW (when V
DD
= 3.0 V)
typ. 0.3mW (when V
DD
= 3.0 V)
Peimnay
E2U0060-18-84
This version: Aug. 1998
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MSM7731-02 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Dual Echo Canceler & Noise Canceler with Dual Codec for Hands-Free |
| MSM7731-02GAZ020 | 制造商:ROHM Semiconductor 功能描述: |
| MSM7731-02GAZ03A | 制造商:ROHM Semiconductor 功能描述: |
| MSM7731-02GAZ03A-7 | 制造商:ROHM Semiconductor 功能描述: |
| MSM7731-02GAZ03B-7 | 制造商:ROHM Semiconductor 功能描述: |
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