7402 Logic Gate
A B Y L L H L H L H L L H H L
A
B
(A+B) (L)
OR gate with high true inputs, low true output
A B Y 0 0 0 0 1 1 1 0 1 1 1 1
A(L)
B(L)
AB
AND gate with low true inputs, high true output
A B Y 1 1 1 1 0 0 0 1 0 0 0 0
Low True
High True
High True
Low True
AND
OR
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