Other Parts Discussed in Thread: LSF0002
你好 附件使用的原理图是否存在问题,

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EN处的电压应为3V3(不大于3V3+VTH,或0.7V),以确保I/O的正确切换。还需要上拉电阻器,但此处似乎缺失了。请注意,LSF0002也可以在这里用于VA=VB的交换机应用程序,其封装占用空间较小。