NTE74LS253,置换半导体 DUAL SELECT/MLTIPLXR
NTE74LS258,置换半导体 QUAD SELECT/MLTIPLXR
NTE74LS26,置换半导体 QUAD 2-IN HI-V NAND
NTE74LS260,置换半导体 DUAL 5-IN NOR GATE
NTE74LS266,置换半导体 QUAD 2-IN EXCLU NOR
NTE74LS27,置换半导体 TRIP 3-IN +NOR DIP14
NTE74LS273,置换半导体 OCTAL D F/F W/CLR
NTE74LS279,置换半导体 SET-RESET LTCH DIP16
