# Logic Gate Symbols (Digital Electronics)

**Logic gates** are electronic devices that perform operations based on two states (1 - 0) necessary to obtain logical decisions.

Symbol | Description | Symbol | Description | |
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## Logic Gate Symbols, ANSI System |
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Logic gate AND gate + info |
Logic gate OR gate + info |
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Logic gate NAND gate + info |
Logic gate NOR gate + info |
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NAND logic gate tri-state | Logic gate exclusive OR XOR gate + info |
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Logic gate that functions as an AND and a NAND | Logic gate exclusive NOR XNOR gate + info |
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Logic gate that functions as an OR and a NOR | Equivalent to logic gate XNOR + info |
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Logic buffer | Logic inverter NOT + info |
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Logic buffer tri-state + info |
Negated logic buffer | |||

Differential | Logic driver | |||

## Logic Gate Symbols, British System (BS 3939) |
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Logic gate AND gate |
Logic gate OR gate |
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Logic gate AND gate |
Logic gate OR gate |
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Logic gate NAND gate |
Logic gate NOR gate |
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Logic gate NAND gate |
Logic gate NOR gate |
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Exclusive OR logic gate XOR gate |
Exclusive NOR logic gate XNOR gate |
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Buffer | Exclusive OR logic gate XOR gate |
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Logic inverter NOT |
Inverter Schmitt | |||

## Logic Gate Symbols, IEC System |
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Logic gate AND gate |
Logic gate OR gate |
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Logic gate NAND gate |
Logic gate NOR gate |
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Exclusive OR logic gate XOR gate |
Buffer | |||

Exclusive NOR logic gate XNOR gate |
Logic inverter NOT |
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## Logic Gate Symbols, DIN System |
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Logic gate AND gate |
Logic gate OR gate |
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Logic gate NAND gate |
Logic gate NOR gate |
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Logic gate XOR | Logic gate XNOR | |||

Logic gate XOR | Logic gate XNOR | |||

Logic Buffer | Logic inverter NOT gate |
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## Logic Gate Symbols, NEMA System |
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Logic gate AND gate |
Logic gate OR gate |
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Logic gate NAND gate |
Logic gate NOR gate |
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Logic inverter NOT |
Exclusive OR logic gate XOR gate |
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## Symbols of Programming Conventions |
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Intact programmable connection | Fixed connection | |||

No connection | ||||

## Logic circuits symbols (Digital Electronics)## Flip-Flop symbols (Digital Electronics) |