SN74LS244DBR
SN74LS244DBRE4
SN74LS244DBRG4
SN74LS244DW
SN74LS244DWE4
SN74LS244DWG4
SN74LS244DWR
SN74LS244DWR2
SN74LS244DWRE4
SN74LS244DWRG4
19129493934(手机优先微信同号)0755-83266697