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Description
The CD74HC283 is a high-speed CMOS logic 4-bit binary full adder with fast carry. It adds two 4-bit binary numbers and generates a carry-out bit if the sum exceeds 31. The CD74HC283 is a popular choice for a variety of applications, including arithmetic logic units (ALUs), digital signal processors (DSPs), and microcontrollers.
Features:
- Adds two 4-bit binary numbers
- Full internal lookahead
- Fast ripple carry for economical expansion
- Operates with both positive and negative logic
- Wide operating temperature range: -55°C to 125°C
- Balanced propagation delay and transition times
- Significant power reduction compared to LSTTL logic ICs
Specifications:
- Supply voltage range: 2 V to 6 V
- Input voltage range: 0 V to VCC
- Output voltage range: 0 V to VCC
- Fanout: 10 LSTTL loads
- Propagation delay: 11 ns (typical)
- Power consumption: 2 mW (typical)
Pinout:
- A0 - A3: 4-bit inputs A
- B0 - B3: 4-bit inputs B
- CIN: Carry-in
- SUM0 - SUM3: 4-bit sum outputs
- COUT: Carry-out
- GND: Ground
- VCC: Supply voltage
Truth Table:
| A | B | CIN | SUM | COUT |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 1 | 0 |
| 0 | 1 | 0 | 1 | 0 |
| 0 | 1 | 1 | 1 | 1 |
| 1 | 0 | 0 | 1 | 0 |
| 1 | 0 | 1 | 0 | 1 |
| 1 | 1 | 0 | 0 | 1 |
| 1 | 1 | 1 | 1 | 1 |
Applications:
- Arithmetic logic units (ALUs)
- Digital signal processors (DSPs)
- Microcontrollers
- Counters
- Adders
- Subtractors
- Comparators
- Logic circuits