Four Bit Adder or Subtractor using 7483

FOUR BIT ADDER/ SUBTRACTOR USING 7483

AIM:

To set up a 4 bit adder/subtractor circuit using 7483.

MATERIALS AND TOOLS REQUIRED:

Digital IC Trainer kit, IC 7483, 7486, power supply.

THEORY:

7483 is a TTL IC with 4 full adders in it. This means that it can add two 4 bit numbers. In a 4 bit adder A₃A₂A₁A₀ and B₃B₂B₁B₀ are the inputs and Cout and S₃S₂S₁S₀ are the outputs. CARRYIN pin is grounded for 4 bit adder. This is also called a nibble adder.

Circuit Diagram:

PROCEDURE:

The circuit is set up. The inputs are applied and SUB is set to zero. The added output is noted. Then SUB is set to one. And again inputs are applied and outputs are noted. Observations are tabulated.

RESULT:

A 4 bit adder/subtractor circuit using 7483 IC is set up.