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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
TOSHIBA is not responsible for any incorrect or incomplete information. Information is subject to change at any time without notice.
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组合逻辑：解码器
解码器
示例：VHC138
解码器将N个编码输入的二进制信息转换为最多2N个独特输出。它通常用于增加端口数量和生成芯片选择信号。
解码器的操作
以下显示了3对8解码器（即具有三个输入和八个输出的解码器）的逻辑符号、真值表和时序图。
下面显示如何使用3对8解码器从三个输入（A、B和C）生成八个芯片选择信号。当A、B和C都为低电平时，只有／Y0输出提供逻辑低电平，所以选择IC0。
此图表明，通过三个输入的组合，可以从最多八个芯片中选择任意芯片。
