Universal Gates

Hi readers, In this post, I am going to explain about universal gates.
In the previous post, I had explained basic gates if you want to check them click here.

Universal gates are 2 they are:
1. NAND Gate
2. NOR Gate

Now I'm going to explain universal gates.

1. NAND Gate: 

A NAND gate can be obtained by a combination of AND gate and NOT gate. The output of the NAND gate is always equal to the complement of the AND gate.

• When all the inputs are high (1), the output is low (0). If anyone or both inputs are low (0), the output is high (1). 
• The fabricated IC number is 7400.
• It cost's around 35/-.
• It is a DIP (Dual In-line Package) 

Boolean Expression: Q = A.B  

Logic Symbol:

Combination of AND and NOT gates gives NAND gate

Pin diagram:

Truth Table:

A(I/p)	B(I/p)	Q(O/p)
0	0	1
0	1	1
1	0	1
1	1	0

2. NOR Gate: 

A NOR Gate can be obtained by a combination of OR gate and NOT gate. The output of the NOR gate is always the complement of the OR gate.

• The output is high (1) only when all the inputs are low (0). If any one or both the inputs are high (1), then the output is low (0).
• The fabricated IC number is 7402.
• It cost's around 15/-.
• It is a DIP (Dual In-line Package).

 Boolean Expression: Q =  A+B

Logic Symbol:

Combination of OR gate and NOT gate is NOR gate

Pin diagram:

Truth Table:

A(I/P)	B(I/P)	Q(O/P)
0	0	1
0	1	0
1	0	0
1	1	0

Readers, this is the explanation of Universal gates and in the next post, I'm going to explain about special gates.

To purchase those Logic gates, links are given below

• NAND gate
• NOR gate

And to study these IC's we need a Digital logic trainer kit so to purchase it or view it click here.

...Thanks for reading this post...

Image credits @wikipedia.