Quick Reference - Logic Gates

This page provides a quick reference for the basic gates that you will be using throughout this course. In the table below, each gate is named, has its schematic symbol, and associated truth table.

Name	Symbol	Truth Table	Pins	The Rule
NOT		A Y 0 1 1 0	1	If the input is a '1' then output a '0' If the input is a '0' then output a '1'
AND		B A Y 0 0 0 1 1 0 1 1 0 0 0 1	Any	If all inputs are a '1' then output a '1' otherwise output a '0'
OR		B A Y 0 0 0 1 1 0 1 1 0 1 1 1	Any	If all inputs are a '0' then output a '0' otherwise output a '1'
XOR		B A Y 0 0 0 1 1 0 1 1 0 1 1 0	Even	If an odd number of inputs are a '1' then output a '1' otherwise output a '0'
NAND		B A Y 0 0 0 1 1 0 1 1 1 1 1 0	Any	If all inputs are a '1' then output a '0' otherwise output a '1'
NOR		B A Y 0 0 0 1 1 0 1 1 1 0 0 0	Any	If all inputs are a '0' then output a '1' otherwise output a '0'
XNOR		B A Y 0 0 0 1 1 0 1 1 1 0 0 1	Even	If an even number of inputs are a '1' then output a '1' otherwise output a '0'