7400 Logic Gate

A B YL L HL H HH L HH H L

AND gate with high true inputs, low true output

A B Y0 0 00 1 01 0 01 1 1

A(L)

B(L)

A + B

OR gate with low true inputs, high true output

A B Y1 1 11 0 10 1 10 0 0

A

B

(AB) (L)

Low True

High True

High True

Low True

AND

OR

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