Friday, 13 February 2015

digital logic - Why do 74 series IC's have two ENABLE pins



I am using 74LS154 4 to 16 decoder Link to *.pdf here. It has two ACTIVE LOW 'ENABLE' pins at the input. What is the use of two ENABLE input pins is the question.


Most of the 74 series IC's used in the lab has two ENABLE pins..




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