SN74LS648DW
SN74LS648DWE4
SN74LS648DWG4
SN74LS648NT
SN74LS648NTE4
SN74LS652DW
SN74LS652DWE4
SN74LS652DWG4
SN74LS652DWR
SN74LS652DWRE4
19129491934(手机优先微信同号)