双四选一数据选择器74 HC153的级联分析及研究

摘要

将多片双四选一数据选择器74HC153级联，再附加2线—4线译码器74HC139构成不同的数据选择器，能够灵活、有效地扩大数据选择器的使用范围。不同的74HC153进行级联时，任何时候只允许一个数据选择器工作，数据选择器的输出状态由地址输入端决定。%It takes multiple pairs of data selectors 74HC153 from double/four choose one to cascade,which constitutes different data selector with additional to 2-4 lines decoder 74HC139,it can be flexibility,effectively enlarge the using range of the data selector. Different 74 hc153 cascade,at any time only allows a data selector to work,the data selector output state is determined by the address input.