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SN74LVC1G32: SN74LVC1G32

Part Number: SN74LVC1G32

SN74LVC1G32,VCC是1.8V,A是1.8V先来,来后就没有了,在A掉电之前5秒,B有1.8V供电过来,并且是一直有1.8V,为什么Y没有1.8V输出,谢谢!