SN74AHCT540DBR
SN74AHCT540DBRE4
SN74AHCT540DBRG4
SN74AHCT540DGVR
SN74AHCT540DGVRE4
SN74AHCT540DGVRG4
SN74AHCT540DW
SN74AHCT540DWE4
SN74AHCT540DWG4
SN74AHCT540DWR
19129491934(手机优先微信同号)