The IC 74147 - Encoder (HD74HC147P) is a 10-to-4 line priority encoder designed for TTL logic families. It accepts 10 active-low decimal inputs (0–9) and encodes them into a 4-bit binary output. With internal priority logic, it ensures that the highest-priority input (with the lowest number) is always represented on the output when multiple inputs are active.
This encoder is ideal for keyboard encoding, data multiplexing, and other digital applications where multiple input signals must be compressed into fewer output lines. The HD74HC147P version operates in the High-Speed CMOS (HC) range, offering fast switching speeds and low power consumption while maintaining compatibility with TTL devices.
Key Features:
- 10-line to 4-line priority encoding
- Active-low inputs and outputs
- TTL and CMOS compatible
- Fast propagation delay
- DIP-16 package for easy prototyping
Applications:
- Keypad interface systems
- Data compression in digital circuits
- Priority logic implementation
- Address encoding
