This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
如题，简单查看了数据手册，没有发现这三个型号有什么明显差别，请TI的工程师们帮忙解答下。谢谢
您好， 已经收到了您的案例，调查需要些时间，感谢您的耐心等待。
SN74HC126和SN74HC126A直接的区别见下方FAQ.
(+) [FAQ] What is the difference between the SN74HCxx and the SN74HCxxA? - Logic forum - Logic - TI E2E support forums
SN和CD前缀，见下方链接的解释。
(+) SN74ACT240: Difference between SN74ACT240 and CD74ACT240, CD74ACT540 - Logic forum - Logic - TI E2E support forums
感谢回复，问题已解决，我会选择SN74HC126。谢谢
