SN74AC240DBR
SN74AC240DBRE4
SN74AC240DBRG4
SN74AC240DW
SN74AC240DWE4
SN74AC240DWG4
SN74AC240DWR
SN74AC240DWRE4
SN74AC240DWRG4
SN74AC240N
19129493934(手机优先微信同号)0755-83266697