onsemi

MC74HCT14ANG

MC74HCT14ANG Description

The MC74HCT14ANG from onsemi is a hex Schmitt-trigger inverter belonging to the 74HCT series, designed for high-speed CMOS logic applications. This through-hole-mounted IC integrates six independent inverters with Schmitt-trigger inputs, ensuring robust noise immunity and precise signal conditioning. Operating within a 4.5V to 5.5V supply range, it delivers a maximum propagation delay of 32ns at 5V with a 50pF load, making it suitable for timing-critical circuits. The device features TTL-compatible input levels (0.5V–0.6V for LOW, 1.9V–2.1V for HIGH) and provides symmetrical 4mA output drive current, enabling reliable interfacing with mixed-logic systems. Although marked as obsolete, it remains a dependable choice for legacy designs due to its low quiescent current (1µA max) and REACH compliance.

MC74HCT14ANG Features

• Schmitt-Trigger Inputs: Enhances noise rejection and signal integrity by providing hysteresis (typically 0.5V).
• Wide Voltage Range: Supports 4.5V–5.5V operation, compatible with standard 5V TTL/CMOS systems.
• High-Speed Performance: 32ns propagation delay ensures efficient signal processing.
• Low Power Consumption: 1µA max quiescent current minimizes energy usage in standby modes.
• Symmetrical Output Drive: 4mA sink/source current balances load handling capabilities.
• Through-Hole Package: 14-pin DIP facilitates easy prototyping and breadboarding.
• TTL-Level Compatibility: Direct interface with TTL logic without additional level-shifting circuitry.

MC74HCT14ANG Applications

• Signal Conditioning: Ideal for debouncing switches or filtering noisy sensor outputs due to Schmitt-trigger hysteresis.
• Clock Synchronization: Used in oscillator circuits and pulse shaping for timing-critical systems.
• Logic Level Conversion: Bridges 5V CMOS and TTL logic families in mixed-voltage designs.
• Industrial Control Systems: Reliable performance in environments with electrical interference.
• Legacy Electronics Maintenance: Suitable for repairing or replicating obsolete equipment requiring 74HCT-series logic.

Conclusion of MC74HCT14ANG

The MC74HCT14ANG excels in applications demanding noise immunity, precise timing, and TTL compatibility. Its Schmitt-trigger inputs and low power consumption make it a versatile choice for signal conditioning and logic interfacing. While obsolete, its through-hole packaging and proven reliability ensure continued utility in prototyping, industrial controls, and legacy system upkeep. Engineers valuing robustness over cutting-edge availability will find this IC a pragmatic solution.