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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1039254/tca9545a-unused-i2c-sda-scl-pin-connection
您好！
对于未使用的 SDA/SCL、我是否可以将这些引脚悬空？
是的；请参阅 TI 高精度实验室-开关和多路复用器：我是否可以将未使用的引脚悬空？ 视频。
