SN74LS642N
SN74LS642NE4
SN74LS642NS
SN74LS642NSE4
SN74LS642NSG4
SN74LS642NSR
SN74LS642NSRE4
SN74LS642NSRG4
SN74LS643-1N
SN74LS643N
0755-83237632