MC74HC640AN
MC74HC646DWR2
MC74HC688DWR2
MC74HC688N
MC74HC7266
MC74HC7266N
MC74HC73ADG
MC74HC73ADR2G
MC74HC73ADTG
MC74HC73ADTR2G
19129911934(手机优先微信同号)
19129491934(手机优先微信同号)