Symbol 
Description 

Symbol 
Description 
Logic gate symbols, ANSI system 


Logic gate
AND gate 


Logic gate
OR gate


Logic gate
NAND gate 


Logic gate
NOR gate 

NAND logic gate tristate 


Logic gate OR exclusive
XOR gate 

Logic gate that functions AND and NAND 


Logic gate NOR exclusive
XNOR gate 

Logic gate that functions OR and NOR 


Equivalent to logic gate XNOR 

Logic buffer 


Logic inverter
NOT 

Logic buffer tristate 


Logic buffer denied 

Differential 


Logic driver 
Logic gate symbols, British system (BS 3939) 


Logic gate
AND gate 


Logic gate
OR gate 

Logic gate
AND gate 


Logic gate
OR gate 

Logic gate
NAND gate 


Logic gate
NOR gate 

Logic gate
NAND gate 


Logic gate
NOR gate 

Exclusive OR logic gate
XOR gate 


Exclusive NOR logic gate
XNOR gate 

Buffer 


Exclusive OR logic gate
XOR gate 

Logic inverter
NOT 


Inverter Schmitt 
Logic gate symbols, IEC system 


Logic gate
AND gate 


Logic gate
OR gate 

Logic gate
NAND gate 


Logic gate
NOR gate 

Exclusive OR logic gate
XOR gate 


Buffer


Exclusive NOR logic gate
XNOR gate 


Logic inverter
NOT 
Logic gate symbols, DIN system 


Logic gate
AND gate 


Logic gate
OR gate 

Logic gate
NAND gate 


Logic gate
NOR gate 

Logic gate XOR 


Logic gate XNOR 

Logic gate XOR 


Logic gate XNOR 

Logic inverter
Buffer



Logic inverter
NOT gate 
Logic gate symbols, NEMA system 


Logic gate
AND gate 


Logic gate
OR gate 

Logic gate
NAND gate 


Logic gate
NOR gate 

Logic inverter
NOT 


Exclusive OR logic gate
XOR gate 
FlipFlop symbols 


SR FlipFlop
NAND asynchronous 


SR FlipFlop
NOR asynchronous 

SR FlipFlop
NAND latch, asynchronous 


SR FlipFlop
NOR asynchronous 

SR FlipFlop
SR synchronous 


SR FlipFlop
SR latch, synchronous 

SR FlipFlop
Set Reset 


SR FlipFlop
Set Reset 

JK FlipFlop
master / slave
Activated by high level 


JK FlipFlop
master / slave
Activated by low level 

JK FlipFlop
Activated by the rising edge 


JK FlipFlop
Activated by the falling edge 

JK FlipFlop
Activated by the falling edge 


JK FlipFlop
Generic symbolD FlipFlop 

D FlipFlop
Generic symbol



D FlipFlop 

D FlipFlop
Active for level 


D FlipFlop
Active Edge 

D FlipFlop
Data / Delay 


D FlipFlop
Data / Delay 

T FlipFlop
Toggle 


T FlipFlop
Toggle 

T FlipFlop
Generic symbol 



Electronic logic circuit symbols 


Integrated circuit / IC
Chip logic 


Memory
generic symbol 

555 meterchrono 


4 bit binary counter 

7segment decoder 


Decadic decimal coded binary counter, BCD 

Decádico counter with 10 outputs encoded 


Decoder 1 to 4 

DAC
Analog to digital converter 


DAC
Analog to digital converter 

ADC
Digital to Analog Converter 


Multiplexer 

Logic adder 


Multiplexer, 2 in 1 out 

Semiadder 


Multiplexer, 4 inputs 1 output 

Central Processing Unit
CPU 


1 input 4output demultiplexer 
Display symbols 


Display 7segment LED 


Alphanumeric indicator LED 5x7
Sample letters A 

16segment alphanumeric display 



Symbols programming conventions 


Programmable connection intact 


Fixed connection 

No connection 



