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MSM7581 PDF预览

MSM7581

更新时间: 2024-01-13 01:37:20
品牌 Logo 应用领域
冲电气 - OKI 转换器PC
页数 文件大小 规格书
18页 166K
描述
ITU-T G.721 4ch ADPCM TRANSCODER

MSM7581 技术参数

生命周期:Obsolete包装说明:QFP, TQFP100,.63SQ
Reach Compliance Code:unknown风险等级:5.83
JESD-30 代码:S-PQFP-G100端子数量:100
最高工作温度:80 °C最低工作温度:-30 °C
封装主体材料:PLASTIC/EPOXY封装代码:QFP
封装等效代码:TQFP100,.63SQ封装形状:SQUARE
封装形式:FLATPACK电源:3/5 V
认证状态:Not Qualified子类别:Codecs
最大压摆率:8 mA表面贴装:YES
温度等级:COMMERCIAL EXTENDED端子形式:GULL WING
端子节距:0.5 mm端子位置:QUAD
Base Number Matches:1

MSM7581 数据手册

 浏览型号MSM7581的Datasheet PDF文件第12页浏览型号MSM7581的Datasheet PDF文件第13页浏览型号MSM7581的Datasheet PDF文件第14页浏览型号MSM7581的Datasheet PDF文件第15页浏览型号MSM7581的Datasheet PDF文件第16页浏览型号MSM7581的Datasheet PDF文件第18页 
¡ Semiconductor  
MSM7581  
In this device, internal operating signals are generated according to the ADPCM side SYNC  
(SYXA) signal.  
The timings are shouwn in the figures (a) and (b);  
The arithmetic operation of CODER is performed at "A" in the figure (a).  
The arithmetic operation of DECODER is performed at "B" in the figure (b).  
Therefore, when the conversion delay time Tsip of the CODER is less than t1, ADPCM is output  
at the timing of Tsoa.  
When Tsip is more than t1, ADPCM is output at the timing of Tsoa + 125ms.  
For DECODER, when Tsia<t3 and Tsop<t2, the conversion delay time is Tsop-Tsia.  
As mentioned above, a data ship may occur at Tsip=t1 in CODER, and at Tsia=t3 and Tsop=t2  
in DECODER.  
Therefore, the timings of SYNC signals of both PCM and ADPCM sides should not be set up in  
the range about ±500nsec of Tsip=t1, Tsia=t3 and Tsop=t2.  
For normal operation, SYNC clocks for ADPCM and PCM sides should be continuous at 8 kHz  
and synchronized with each other even if their phases are different.  
17/18  

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