SN74AHC1GU14HDCKR
SN74AHC240
SN74AHC240DBR
SN74AHC240DBRE4
SN74AHC240DBRG4
SN74AHC240DGVR
SN74AHC240DGVRE4
SN74AHC240DGVRG4
SN74AHC240DW
SN74AHC240DWE4
19129491934(手机优先微信同号)