74LS283

Motorola, Texas Instruments

Logic - Arithmetic

4-bit binary full adder with fast carry - high-speed adder with internal carry lookahead for arithmetic operations.

The SN74LS283 is a high-speed 4-bit binary full adder with internal carry lookahead. It accepts two 4-bit binary words (A1-A4, B1-B4) and a carry input (C0), then generates the binary sum outputs (Σ1-Σ4) and carry output (C4) from the most significant bit. The device operates with either active HIGH or active LOW operands (positive or negative logic) and features fast carry propagation for high-speed arithmetic operations.

Supply Voltage:

4.75V - 5.25V

Package:

16-pin DIP

Key Features

4-bit binary full addition
Internal carry lookahead for high speed
Accepts two 4-bit operands plus carry input
Generates 4-bit sum plus carry output
Compatible with positive or negative logic
Low-power Schottky technology (LS series)
High fan-out capability (10 U.L. HIGH, 5 U.L. LOW)
Fast carry propagation
Cascadable for multi-bit arithmetic

Applications

Binary arithmetic operations
Multi-bit adder circuits
Arithmetic logic units (ALUs)
Digital calculators and processors
Address arithmetic in memory systems
Increment/decrement counters
Two's complement arithmetic
BCD arithmetic with correction

Notes

For cascading multiple adders, connect C4 output to C0 input of next stage. The device can handle both unsigned binary and two's complement signed arithmetic. Sum outputs drive 10 U.L. HIGH and 5 U.L. LOW loads.

Documentation

View Complete Datasheet