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PCA9306高压供电端串电压到低压供电端问题请教

Other Parts Discussed in Thread: PCA9306

您好,

PCA9306按照参考设计,低压供电1.8v,高压供电3.3v;实测发现高压供电3.3v后,低压供电端即使不供电,会有2.5v电压,请问是什么原因,谢谢!