十年计数器, 10 解码输出 (5 级约翰逊计数器)
Dual 3-In NOR Gate+Inverter SIMILAR TO 4000 CMOS
Quad 2-Input NOR Gate 4001 MB84001B M4001BP MB4001B MC14001BCP MN4001
Dual 4 In NOR Gate 4002
