Circuit Diagram Of 4 Bit Adder Subtractor Using Ic 7483

By | July 23, 2022



Have you ever wondered how we can use simple logic gates to compute complex 4-bit binary operations? Well, it's made possible through the help of integrated circuits (ICs). One such IC is the 7483, a 4-bit adder and subtractor. This circuit diagram explains its operation.

At the heart of it, the 7483 is a very simple circuit. It consists of four full adders, four comparators, and a couple of control logic circuitry. The four full adders are connected in series to form a larger 4-bit adder. Inputs A, B, C, and D make up the four input bits for the full adder. Outputs X, Y, Z, and T make up the four output bits.

In addition to the full adders, the 7483 also has four comparators. They compare the magnitude of two 4-bit numbers. Depending on the result of the comparison, the subtractor logic chooses the appropriate operation. If the first number is greater than the second, then the adder logic is used. If the second number is greater than the first, then the subtractor logic is used.

Finally, the two control logic circuits are responsible for selecting the adder or subtractor logic. The first one is the carry select logic. It determines whether the carry bit should be set or not. The second one is the subtractor logic. It determines the operation that should be performed.

This is the core circuitry of the 7483 4-bit adder and subtractor. With its help, we can perform a variety of 4-bit binary operations. Its input multiplexers allow us to connect as many inputs as we wish and its output multiplexers allow us to attach as many outputs as we need.

The 7483 4-bit adder and subtractor is a great example of how powerful logic gates can be. It's the ideal solution for performing complex 4-bit operations. As long as the circuit diagram is correctly understood, the 7483 will be able to get the job done.


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