# Is it possible to implement adder using multiplexer?

## Is it possible to implement adder using multiplexer?

Full Adder using 4 to 1 Multiplexer: A 4 to 1 line multiplexer has 4 inputs and 1 output line.In our experiment,we use IC 74153(Multiplexer) and IC 7404(NOT gate) for implementing the full adder. In our experiment, A,B,Cin are the inputs and S,Cout are the outputs.

2 Half Adders and a OR gate is required to implement a Full Adder. With this logic circuit, two bits can be added together, taking a carry from the next lower order of magnitude, and sending a carry to the next higher order of magnitude.

A Half Adder consists of only one AND gate and EX-OR gate. A Full Adder consists of one OR gate and two EX-OR and AND gates. There are two inputs in a Half Adder- A and B. There are a total of three inputs in a Full Adder- A. B.

### How many and or and EXOR gates are required for the configuration of full adder?

Explanation: There are 2 AND, 1 OR and 2 EXOR gates required for the configuration of full adder, provided using half adder.

How do you implement half adder using NAND gate?

Combining these two, the logical circuit to implement the combinational circuit of Half Adder is shown below. As we know that NAND and NOR are called universal gates as any logic system can be implemented using these two….Half Adder Truth Table.

A B Sum
0 0 0
0 1 1
1 0 1
1 1 0

## How does a half adder work?

A half adder is a type of adder, an electronic circuit that performs the addition of numbers. The half adder is able to add two single binary digits and provide the output plus a carry value. It has two inputs, called A and B, and two outputs S (sum) and C (carry).

## Why do we use half adder?

A half adder is used for adding together the two least significant digits in a binary sum such as the one shown in Figure 12.1(a). The four possible combinations of two binary digits A and B are shown in Figure 12.1(b).