AnsweredAssumed Answered

The output pin of 74HC138D was bad often,what should I do?

Question asked by ke tian on Aug 16, 2016
Latest reply on Aug 16, 2016 by ke tian

Like the following picture,    the cs-1,cs-2,cs-3,cs-4 has one load for each ,We add a  2000 ohm pull-up resistor near to the output pin. But factory report that there are many output pin of  74HC138D keep high level all the time, we must change another one to repair this question.

I want to kown ,whether the pull-up resistor make it? or other wrong at there?

 

Outcomes