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參數資料
| 型號： | MT9125 |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | Dual ADPCM Transcoder(雙ADPCM編解碼器) |
| 中文描述： | 雙差分PcM轉碼器（雙差分PcM編解碼器） |
| 文件頁數： | 1/20頁 |
| 文件大小： | 172K |
| 代理商： | MT9125 |
8-73
Features
Dual channel full duplex transcoder
32 kbit/s and 24 kbit/s ADPCM coding,
compatible to G.721 & and G.723 (1988) and
ANSI T1.303-1989
Low power operation, total 25mW typical
Asynchronous 4.096 MHz master clock
operation
Transparent ADPCM bypass capability
Serial interface for both PCM and ADPCM data
streams
ST-BUS interface supported
Pin selected
μ
-law or A-law operation
Pin selected CCITT or sign-magnitude PCM
coding
Single 5 volt power supply
Optional reset value (CCITT Table 3/G.721)
capability
Applications
Pair gain
Voice mail systems
Wireless set base stations
Description
The Dual-channel ADPCM transcoder is a low
power, CMOS device capable of two encoder
functions and two decoder functions. Two 64 kbit/s
PCM channels are compressed into two 32 kbit/s
ADPCM channels, and two 32 kbit/s ADPCM
channels are expanded into two 64 kbit/s PCM
channels. The 32 kbit/s ADPCM transcoding
algorithm utilized conforms to CCITT Recom-
mendation G.721 and ANSI T1.303-1989. The
device also supports a 24 kbit/s (three bit word)
algorithm (CCITT/G.723).
Switching, on-the-fly, between 32 kbit/s and 24 kbit/
s, is possible by toggling the appropriate Mode
Select (MS1-MS4) control pins.
Ordering Information
MT9125AE
MT9125AP
24 Pin Plastic DIP (600 mil)
28 Pin PLCC
-40 to +85
°
C
Figure 1 - Functional Block Diagram
Timing
ST-BUS
Converter
ADPCM
I/O
Transcoder 1
Transcoder 2
PCM
I/O
Control Decode
EN1
EN2
DSTo
DSTi
ENB1
ENB2
VDD
VSS
PWRDN
IC
MS1
MS2
A/
μ
FORMAT
MS3
MS4
C2o
BCLK
F0i
MCLK
ENS
ADPCMi
ADPCMo
ENA
ISSUE 3
August 1993
MT9125
Dual ADPCM Transcoder
Preliminary Information
CMOS
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MT9125AE | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Dual ADPCM Transcoder |
| MT9125AP | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Dual ADPCM Transcoder |
| MT9126 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Quad ADPCM Transcoder |
| MT9126AE | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:CMOS Quad ADPCM Transcoder |
| MT9126AE1 | 制造商:Microsemi Corporation 功能描述:ADPCM VOICE COMPRESSION G.726 16KBPS/24KBPS/32KBPS 5V 28PDIP - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC TRANSCODER QUAD ADPCM 28PDIP 制造商:Microsemi Corporation 功能描述:IC TRANSCODER QUAD ADPCM 28PDIP |
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