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參數(shù)資料
| 型號(hào)： | MSM7581 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | ITU-T G.721 4ch ADPCM TRANSCODER |
| 中文描述： | ITU - T的G.721 4路差分PcM碼器 |
| 文件頁數(shù)： | 1/18頁 |
| 文件大小： | 165K |
| 代理商： | MSM7581 |
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Semiconductor
MSM7581
ITU-T G.721 4ch ADPCM TRANSCODER
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.
The MSM7581 provides cost effective solutions for digital cordless office telephone systems
which are incorporated into PABXs, and for the public base stations which are connected to the
Central Office through digital PSTNs.
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
PCM ) Mute Mode and PAD Mode for each channel
ADPCM Data-through Mode
Capable of time slot conversion
Special ADPCM Input Data Code (”0000”) Detector for each channel
Master Clock Signal : Not necessary
Power supply voltage/Consumption current :
+2.7 V to +5.5 V, 2 mA/channel (max)
Package :
100-pin plastic TQFP (TQFP100-P-1414-0.50-K) (Product name : MSM7581TS-K)
E2U0032-28-82
This version: Aug. 1998
Previous version: Nov. 1996
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MSM7582 | pie/4 Shift QPSK MODEM |
| MSM7582B | pie/4 Shift QPSK MODEM |
| MSM7583GS-BK | pie/4 Shift QPSK MODEM |
| MSM7583 | pie/4 Shift QPSK MODEM |
| MSM7584C | π/4 Shift QPSK MODEM(π/4移動(dòng)QPSK調(diào)制解調(diào)器/ADPCM編碼譯碼器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSM7582 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:pie/4 Shift QPSK MODEM |
| MSM7582B | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:pie/4 Shift QPSK MODEM |
| MSM7583 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:pie/4 Shift QPSK MODEM |
| MSM7583GS-BK | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:pie/4 Shift QPSK MODEM |
| MSM7584C | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:pi /4 Shift QPSK MODEM/ADPCM CODEC |
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