MC74LCX540DT
MC74LCX540DTG
MC74LCX540DTR2
MC74LCX540DTR2G
MC74LCX540DWR2
MC74LCX540DWR2G
MC74LCX540MEL
MC74LCX540MELG
MC74LCX541DT
MC74LCX541DTG
19129911934(手机优先微信同号)
19129491934(手机优先微信同号)