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https://e2e.ti.com/support/logic-group/logic/f/logic-forum/806494/sn74avc2t45-connect-dir-pin
你(们)好
能否将 SN74AVC2T45DCTR 的 DIR 引脚直接连接到 MCU 端口？
谢谢你。
是的、如果 MCU 的 I/O 电压处于允许的范围内、即至少 SN74AVC2T45的 VCC、且电压最高为3.6V
如果您在 MCU 仍处于复位状态时关注方向、则需要一个弱上拉或下拉电阻器。
