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SN74CBTLV3257的手册矛盾



SN74CBTLV3257这款芯片的S端控制A是和B1还是B2通道相接,手册里面有个例子(9页)和之前描述的S高低时选哪个通道不符,搞不懂到底以什么为准,还是自己哪里看错了,希望得到帮助