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常见问题解答:逻辑和电压转换> 单稳多谐振荡 器>>电流常见问题解答
SN74LV221A 等逻辑单稳多谐振荡器(MMV)未使用的通道应终止、以便:
(1)所有输入均处于有效逻辑电平(Vcc 或 GND)
(2) CLR 为 GND
(3) Rext/Cext 为 Vcc (这可以是一个到 Vcc 的上拉电阻器)
(4) Cext 是 GND (可选、这可以保持悬空、但我们建议连接到接地)
您可能还想阅读有关 MMV 工作原理的常见问题解答、网址为 :https://e2e.ti.com/support/logic/f/151/t/863529