Texas Instruments

SN74HCT14DR

SN74HCT14DR Description

The SN74HCT14DR from Texas Instruments is a hex Schmitt-trigger inverter IC designed for high-speed logic applications. Housed in a 14-pin SOIC package, it features six independent inverters with Schmitt-trigger inputs, ensuring robust noise immunity and signal conditioning. Operating within a 4.5V to 5.5V supply range, it delivers a maximum propagation delay of 30ns at 5.5V with a 50pF load, making it suitable for timing-critical circuits. The device complies with ROHS3 and REACH environmental standards and is rated for unlimited moisture sensitivity (MSL 1), ensuring reliability in industrial and commercial environments.

SN74HCT14DR Features

• Logic Type: Hex Inverter with Schmitt-trigger inputs for hysteresis and noise rejection.
• Low Power Consumption: Quiescent current of 2µA (max) minimizes energy usage.
• Wide Input Voltage Range: 0.5V (Low) to 2.1V (High) thresholds ensure compatibility with TTL and CMOS logic levels.
• Balanced Output Drive: 4mA sink/source current for stable signal integrity.
• Surface-Mount Design: 14-SOIC package (Tape & Reel) enables compact PCB integration.
• High-Speed Operation: 30ns propagation delay at 5.5V, ideal for clock shaping and pulse conditioning.

SN74HCT14DR Applications

• Signal Conditioning: Cleans up noisy inputs in sensor interfaces or communication systems.
• Oscillator Circuits: Used in RC oscillators due to Schmitt-trigger hysteresis.
• Debounce Switches: Eliminates contact bounce in mechanical switches for keyboards or control panels.
• Level Shifting: Interfaces between 5V TTL and 5V CMOS systems.
• Timing Modules: Precision delay lines and pulse generators in industrial automation.

Conclusion of SN74HCT14DR

The SN74HCT14DR excels in noise-immune logic inversion with its Schmitt-trigger inputs, low power draw, and high-speed performance. Its versatility in signal conditioning, debouncing, and timing makes it a preferred choice for embedded systems, automotive electronics, and industrial controls. Compared to standard inverters, its hysteresis feature ensures reliable operation in electrically noisy environments, while ROHS3 compliance meets modern environmental standards. A robust solution for 5V logic designs requiring precision and durability.