43常用组合逻辑电路部件 ⊙海南大学 等断 HAINAN UNIVERSITY 例:试用一个双4选1数据选择器74S153实现逻辑函数: Z=AB+bc+ca 解:令 B Z=AB+ BC+CA= A1 Ao+ AoC +CA B AL Ao+ArAC+A, A C+ A Ao C+AoC 0 A1 Ao. 0+ A1 AC+ A1 Ao C+ Al Ao(1+C) A1 Ao. 0+ A1 A C+ A1 Ao C+ A1 Ao Do=0,D1=C,D2=C,D3=1 信息科学术学院 Digital Electronics Technology 20212/10Digital Electronics Technology 2021/2/10 4.3 常用组合逻辑电路部件 例：试用一个双4选1数据选择器74LS153实现逻辑函数： Z = AB+ BC +CA 0 1 0 (1 ) 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 1 =  + + +  =  + + + + = + + + + = + + = + + A A A A C A A C A A A A A A C A A C A A C A A A A C A A C A A C A A C Z AB BC CA A A A C CA 解：令 A1 = A，A0 = B D0 = 0;D1 = C;D2 = C;D3 =1