74 LS 83 4-Bit Binary Full Adder IC | DIP 16

Description

The 74LS83 4-Bit Binary Full Adder IC is a core arithmetic component belonging to the classic 74LS (Low-Power Schottky) TTL logic family. Housed in a standard 16-pin Dual Inline Package (DIP), this monolithic integrated circuit is designed to add two 4-bit binary words (A and B) along with an incoming carry bit (C0). It outputs a 4-bit binary sum (Sigma) and a final carry-out bit (C4), allowing for rapid and precise digital arithmetic.

Available at Tomson Electronics, the 74LS83 is an indispensable chip for hardware engineers and students building discrete logic circuits. It features internal fast carry look-ahead architecture, which significantly reduces the time delay commonly found in ripple-carry adders. Operating on a strict standard 5V TTL supply, it is frequently used as the foundational building block for Arithmetic Logic Units (ALUs) in custom 8-bit breadboard computers and digital signal processing projects.

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Specifications

• Logic Family: 74LS (Low-Power Schottky TTL)
• Logic Function: 4-Bit Binary Full Adder with Fast Carry
• Package Type: 16-Pin DIP (Through-hole)
• Operating Supply Voltage (Vcc): 4.75V to 5.25V DC (5V Nominal)
• High-Level Input Voltage (Min): 2.0V
• Low-Level Input Voltage (Max): 0.8V
• Operating Temperature Range: 0°C to 70°C

Datasheet

Download 74LS83 Datasheet PDF

Applications

• ALU Construction: Serving as the core addition and subtraction engine in custom 8-bit and 16-bit breadboard computer architectures.
• Binary to BCD Converters: Cascaded in logic networks to translate pure binary outputs into easily readable Binary Coded Decimal formats for 7-segment displays.
• Digital Signal Processing: Performing fast hardware-level arithmetic calculations where software processing would be too slow.
• Educational Prototyping: Teaching the fundamentals of Boolean arithmetic, full adders, and carry propagation in digital electronics labs.

Frequently Asked Questions (FAQ)

Q: Can I connect multiple 74LS83 chips to add 8-bit or 16-bit numbers?
A: Yes, the chip is designed explicitly for cascading. To add 8-bit numbers, simply connect the Carry Out (C4) pin of the first chip directly to the Carry In (C0) pin of the second chip. You can repeat this process indefinitely for 16-bit or 32-bit addition.

Q: What is the difference between the 74LS83 and the 74LS283?
A: Logically and functionally, they are identical 4-bit adders. However, their pinouts are different. The older 74LS83 has its power pins located at unconventional spots (Vcc on Pin 5, Ground on Pin 12). The newer 74LS283 was released to move the power pins to the standard corners (Vcc on Pin 16, Ground on Pin 8) to simplify PCB trace routing.

Q: Can I power this IC with a 3.3V supply?
A: No. The 74LS series relies on Transistor-Transistor Logic (TTL) which requires a very stable 5V supply (specifically between 4.75V and 5.25V). Operating it at 3.3V will result in undefined logic states and circuit failure. For 3.3V systems, consider a CMOS equivalent like the 74HC283.

Package Includes

• 1 × 74LS83 4-Bit Binary Full Adder IC – DIP-16