74283 IC 4-Bit Binary Full Adder
The IC 74283 adds two 4-bit binary numbers (A0–A3 and B0–B3) and an input carry (C0) to produce a 4-bit sum (S0–S3) and a final carry-out (C4). It uses a fast carry look-ahead design to reduce propagation delay and increase speed. You can cascade multiple 74283 chips to build adders for larger bit-widths.
The chip supports high-speed arithmetic logic units (ALUs), counters, and digital processors. It works with standard TTL logic levels, drives outputs reliably, and handles data quickly without glitches.
Pin Configuration (DIP-16)
| Pin | Name | Description |
|---|---|---|
| 1 | C0 | Carry Input |
| 2 | A1 | Input Bit A1 |
| 3 | B1 | Input Bit B1 |
| 4 | S1 | Sum Output Bit 1 |
| 5 | A2 | Input Bit A2 |
| 6 | B2 | Input Bit B2 |
| 7 | S2 | Sum Output Bit 2 |
| 8 | GND | Ground |
| 9 | S3 | Sum Output Bit 3 |
| 10 | A3 | Input Bit A3 |
| 11 | B3 | Input Bit B3 |
| 12 | C4 | Carry Output |
| 13 | S0 | Sum Output Bit 0 |
| 14 | B0 | Input Bit B0 |
| 15 | A0 | Input Bit A0 |
| 16 | VCC | +5V Power Supply |
Key Features
Adds two 4-bit binary numbers plus carry-in
Produces 4-bit sum and carry-out
Fast carry look-ahead for high-speed operation
TTL-compatible logic levels
DIP-16 and SOIC-16 package options
Applications
Implement 4-bit arithmetic operations in ALUs.
Build multi-bit adders by cascading several ICs.
Perform binary addition in counters and registers.
Create arithmetic blocks in microprocessor systems.
Use in digital calculators.
Construct fast frequency counters requiring adders.
Design programmable logic controllers.
Serve as a basic teaching tool for adder circuits.
Generate quick carry chains for larger operations.
Apply in digital signal processing hardware.
Specifications Table
| Parameter | Value |
|---|---|
| Logic Family | TTL |
| Function | 4-bit Binary Full Adder |
| Number of Bits | 4 |
| Inputs | A0–A3, B0–B3, C0 |
| Outputs | S0–S3, C4 |
| Input HIGH Voltage | ≥ 2.0V |
| Input LOW Voltage | ≤ 0.8V |
| Output HIGH Voltage | ≥ 2.4V |
| Output LOW Voltage | ≤ 0.4V |
| Propagation Delay | ~20 ns ‘ |
| Max Frequency | ~25 MHz |
| Supply Voltage | 4.75V–5.25V |
| Operating Temp | 0°C–70°C |
| Package Type | DIP-16 / SOIC-16 |
| Number of Pins | 16 |
