SN7442N DM7442N 7442N SN74LS42NDIP原装现货实物实拍 质优价廉

SN7442N DM7442N 7442N SN74LS42NDIP原装现货实物实拍 质优价廉

sn74ls42 47 48 75 76 83 85 109 112 123 138 139ndip 芯片-16

sn74ls42 47 48 75 76 83 85 109 112 123 138 139ndip 芯片-16

sn74ls42 47 48 75 76 83 85 109 112 123 138 139ndip 芯片-16