SN74LS642DW
SN74LS642DWE4
SN74LS642DWG4
SN74LS642N
SN74LS642NE4
SN74LS642NS
SN74LS642NSE4
SN74LS642NSG4
SN74LS642NSR
SN74LS642NSRE4
010-62104931