onsemi

MC74HCT04AD

MC74HCT04AD Description

The MC74HCT04AD from onsemi is a high-speed CMOS hex inverter IC designed for general-purpose logic applications. Housed in a 14-pin SOIC package, this surface-mount device operates within a 4.5V to 5.5V supply range, making it compatible with TTL levels while offering the low power consumption of CMOS technology. With a maximum propagation delay of 17ns at 5V and 50pF load, it ensures reliable high-speed signal inversion. The device features six independent inverters, each with a single input, and delivers a balanced output current of 4mA (sink/source). Although marked as obsolete, it remains a robust choice for legacy designs due to its proven performance and REACH compliance.

MC74HCT04AD Features

• Logic Type: Hex Inverter (6 independent channels).
• Voltage Compatibility: TTL-level inputs (2V high, 0.8V low) with CMOS-level output swing, ensuring seamless interfacing in mixed-logic systems.
• Low Power Consumption: Quiescent current of 1µA (max), ideal for battery-operated or power-sensitive applications.
• High Noise Immunity: HCT family characteristics provide superior noise margins compared to standard CMOS.
• Packaging: Supplied in a tube-packed 14-SOIC format, suitable for automated assembly processes.
• Wide Operating Range: Supports 4.5V–5.5V supplies, aligning with common 5V logic systems.

MC74HCT04AD Applications

• Signal Conditioning: Inverting buffering for clock signals, sensor outputs, or digital communication lines.
• Logic Level Shifting: Bridging TTL and CMOS interfaces in legacy industrial control systems.
• Oscillator Circuits: Used in crystal or RC-based oscillator designs for timing applications.
• Waveform Generation: Creating square waves or pulse trains in test equipment and embedded systems.
• Power Management: Inverting enable/disable signals in voltage regulator control circuits.

Conclusion of MC74HCT04AD

The MC74HCT04AD offers a reliable, low-power solution for inverting logic signals in 5V systems, combining TTL compatibility with CMOS efficiency. Its high noise immunity, fast switching speed, and compact SOIC packaging make it suitable for space-constrained or noise-prone environments. While obsolete for new designs, it remains a practical choice for maintenance, repairs, or retrofitting existing systems where HCT logic is preferred. Engineers valuing proven performance and ease of integration will find this IC a dependable component for diverse digital applications.