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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1099858/tca9535-interrupt-pull-up-voltage
您好，
将TCA9535的中断引脚上拉至与VDD不同的电压时是否有任何问题？
我想为TCA9535提供5V电源，并在中断引脚上使用3V3上拉式。
谢谢你
这是正常的；漏极开路输出可被拉至任何有效电压。
