000

101

100

cd' + bc' + a'bd

cd' + b'c+ a'bd

cd + b'c + a'bd

cd' + b'c' + a'bd

3

6

5

IC74556

IC74151

IC74155

Any pulse given to go into previous state 

Trigger pulse given to change the state

Trigger pulse given to previous state

Trigger pulse not given to change the state

(b+c') * (c'+d) * (a+b')

b+c) * (c'+d) * (a'+b')

(b+c) * (c'+d) * (a+b')

b+c) * (c'+d') * (a+b')

cd' + b'c

cd' + b'c' + a'bd

cd' + b'c' + abd

cd' + b'c'

101010

101111

111110

110111

Consensus law

Duality law

Absorption law

Distributive law

XNOR Gate

AND Gate

XOR Gate

NAND Gate