The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC.74LS83 performs the addition of two 4-bit binary numbers. The sum (∑) outputs are provided for each bit and the resultant carry (C4) is obtained from the fourth bit.
74LS83 Features
- Full-carry look-ahead across the four bits
- Systems achieve partial look-ahead performance with the economy of ripple carry
- Typical add times
- Two 8-bit words 25 ns
- Two 16-bit words 45 ns
- Typical power dissipation per 4-bit adder 95 mW
74LS83 Specifications
| Supply Voltage | 4.75 – 5.25Vdc |
| Maximum Clock Frequency | 40Mhz |
| Power Dissipation | 2mW/gate @100kHz |
| Minimum Output Current | 8mA |
| Propagation Delay | 10nS |
| Fan Out (TTL Loads) | 20 |
74LS83 Pinout Diagram
74LS83 Pin Description
| Pin No | Pin Name | Description |
| 1 | A4 | Operand Input A4 |
| 2 | Σ3 | Sum Output 3 |
| 3 | A3 | Operand Input A3 |
| 4 | B3 | Operand Input B3 |
| 5 | VCC | Positive Supply |
| 6 | Σ2 | Sum Output 2 |
| 7 | B2 | Operand Input B2 |
| 8 | A2 | Operand Input A2 |
| 9 | Σ1 | Sum Output 1 |
| 10 | A1 | Operand Input A1 |
| 11 | B1 | Operand Input B1 |
| 12 | GND | Ground Pin |
| 13 | C0 | Carry Input |
| 14 | C4 | Carry Output |
| 15 | Σ4 | Sum Output 4 |
| 16 | B4 | Operand Input B4 |
74LS83 Circuit
Here is a simple 1 bit Full Adder Circuit using logic gates XOR,AND and OR.
Applications
- Mathematical Addition in Electronic Circuits
- Ripple Carry Adder
74LS83 Alternative Equivalent
Download 74LS83 4-bit Binary Full Adder Datasheet from the link given below.
