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https://e2e.ti.com/support/logic-group/logic/f/logic-forum/1496379/cd74ac161-fmax-and-input-clock-level-requirement
工具与软件：
您需要一个电平转换器。
现代逻辑系列中没有计数器、因为此类操作是在当今的微控制器中完成的。
