74LS83 4-Bit Binary Full Adder IC With Fast Carry

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The 74LS83 is a high-speed 4-Bit binary Full Adder with an internal carry lookahead. It accepts two 4-bit binary words (A1–A4, B1–B4) and a Carry Input (C0). It generates the binary Sum outputs (R1–R4) and the Carry Output (C4) from the most significant bit. The output of the IC always comes in TTL which makes it easy to work with other TTL devices and microcontrollers. The IC 74LS83 is smaller in size and it has a much faster speed which makes it reliable in every kind of device.

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What is a Full Adder Circuit?

A full adder is a digital circuit that performs addition. Full adders are implemented with logic gates in hardware. A full adder adds three one-bit binary numbers, two operands and a carry bit. The adder outputs two numbers, a sum and a carry bit.

74LS83 Pinout

74LS83 Pin Configuration

Pin No	Pin Name	Description
1	A4	Input pin for the adder circuit (Four pins for four stages)
2	Σ3	Output pin for the Adder circuit (Four pins for four stages)
3	A3	Input pin for the adder circuit
4	B3	Second Input for the adder circuit (Four pins for four stages)
5	VCC	Supply Voltage
6	Σ2	Output pin for the Adder circuit
7	B2	Second Input for the adder circuit
8	A2	Input pin for the adder circuit
9	Σ1	Output pin for the Adder circuit
10	A1	Input pin for the adder circuit
11	B1	Second Input for the adder circuit
12	GND	Ground Pin
13	C0	Carry Input – from the previous stage if present.
14	C4	Carry Out pin to cascade with other ICs.
15	Σ4	Output pin for the Adder circuit
16	B4	Second Input for the adder circuit