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我如何連結CMOS 和 TTL 的訊號線?



硬體: Multifunction DAQ (MIO)

問題: 我有一些CMOS規格的訊號來源和一些TTL的訊號來源,我應該如何做才能成功的連結他們呢?

解答: 您可以使用一個pull-up電阻(介於1 kOhm 到 2.2 kOhms中間)連接Vcc(通常是+5 V)和訊號點。當您要由TTL端輸出到CMOS端輸入時,您必須要使用一個pull-up電阻。當您要由CMOS端輸出到TTL端輸入時,則不需要連接 pull-up 電阻即可。

相關連結: What Is the Definition of a TTL (Transistor-Transistor Logic) Compatible Signal?
Basic Differences Between CMOS and TTL
3.3 Volt TTL from Digital Products


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報告日期: 12/20/1995
最後更新: 08/20/2003
文件偏號: 0GJ98L03