Digital / Logic Circuit Symbols

- circuit symbols or circuit diagram symbols for logic elements including AND, OR, NAND, NOR, etc.

There is a vareity of different symbols for logic elements within a circuit. NAND, NOR and AND and OR are the most common circuit symbols, but oters are also used.

This page provides circuit symbols for logic elements.

The circuit symbols are based on those that appear to be most widely used.

Logic circuit symbols

The selection of logic circuit diagram symbols:

The symbol for a logic buffer block
Logic buffer

The circuit symbol for a logic inverter block with the small circle on the output indicating the inversion
Logic inverter

Symbol for an AND logic block showing the two inputs (there can be as many as required) and the single output
Logic AND gate

the NAND gate circuit symbol showing the small circle on the output to indicate the inversion. Two inputs are shown, but there can be as many as needed
Logic NAND gate

The circuit symbol for an OR gate showing two inputs and the one output. More inputs cna be added to the symbol as needed
Logic OR gate

The circuit symbol for a logic NOR function with the indication of the inverting function.
Logic NOR gate

Logic exclusive OR circuit symbol
Logic exclusive OR gate

Logic exclusive NOR circuit symbol
Logic exclusive NOR gate

<< Previous   |   Next >>

Share this page

Want more like this? Register for our newsletter

data centres Martin Hägerdal | Ericsson
Data Centre Power Supply Hardware & Software Trends
Data centres are becoming increasingly important as the amount of data being stored and accessed rises exponentially - but one forgotten element is the data centre power supplies.
Designing for Li-ion Batteries in Motor Applications
Discover all the design considerations for integrating brushless DC motors with Li-ion batteries in 3-phase motor applications in this whitepaper from Intersil.

More whitepapers
 is operated and owned by Adrio Communications Ltd and edited by Ian Poole. All information is © Adrio Communications Ltd and may not be copied except for individual personal use. This includes copying material in whatever form into website pages. While every effort is made to ensure the accuracy of the information on, no liability is accepted for any consequences of using it. This site uses cookies. By using this site, these terms including the use of cookies are accepted. More explanation can be found in our Privacy Policy