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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.
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逻辑电路：三态缓冲器（1）
在一般逻辑元件中，输出信号由输入信号决定，状态为“1”或“0”。
但是，有些逻辑元件除了“1”和“0”之外，还有其他状态。
例如，右图中的电路与非门（NOT)电路相似，但与非门（NOT）电路不同。非门（NOT）电路通过将输入信号反相输出数据，该电路将输入数据原样输出。
如果控制部分设置为“1”（高电平），则输入数据按原样输出。
但是，如果控制部分设置为“0”（低电平），如图2所示，则输出部分将断开连接，数据无法输出。这种断开状态称为高阻抗。
像这样可以有“1”（高电平）状态、“0”（低电平）状态、高阻抗状态这三种输出状态的电路，称为三态。
