MC74VHC540DTR2
MC74VHC540DTR2G
MC74VHC540DWR2
MC74VHC540DWR2G
MC74VHC541DT
MC74VHC541DTG
MC74VHC541DTR2
MC74VHC541DTR2G
MC74VHC541DWR2
MC74VHC541DWR2G
19129911934(手机优先微信同号)
19129491934(手机优先微信同号)