SN74AHC244DB
SN74AHC244DBE4
SN74AHC244DBG4
SN74AHC244DBR
SN74AHC244DBRE4
SN74AHC244DBRG4
SN74AHC244DGVR
SN74AHC244DGVRE4
SN74AHC244DGVRG4
SN74AHC244DW
19129491934(手机优先微信同号)