101

100

000

cd' + b'c' + a'bd

cd' + b'c+ a'bd

cd + b'c + a'bd

cd' + bc' + a'bd

5

3

6

IC74556

IC74151

IC74155

Trigger pulse given to change the state

Any pulse given to go into previous 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' + abd

cd' + b'c

cd' + b'c' + a'bd

101010

101111

111110

110111

Absorption law

Duality law

Consensus law

Distributive law

XOR Gate

XNOR Gate

NAND Gate

AND Gate