Texas Instruments

CD74HC27E

CD74HC27E Description

The CD74HC27E from Texas Instruments is a high-speed CMOS NOR gate integrated circuit, part of the 74HC series. It features three independent 3-input NOR gates in a 14-pin DIP (Dual Inline Package) through-hole mounting configuration. Designed for 2V to 6V operation, it delivers a maximum propagation delay of 16ns at 6V with a 50pF load, ensuring rapid signal processing. The device is RoHS3 compliant, REACH unaffected, and carries an EAR99 ECCN, making it suitable for global applications. With a quiescent current of just 2µA, it is optimized for low-power designs while maintaining robust 5.2mA output drive capability (both high and low).

CD74HC27E Features

• Logic Type: 3-input NOR gate with 3 independent circuits in a single package.
• Wide Voltage Range: Operates from 2V to 6V, compatible with TTL and CMOS logic levels.
• High-Speed Performance: 16ns propagation delay at 6V, ideal for timing-critical applications.
• Low Power Consumption: 2µA quiescent current minimizes energy usage in battery-powered systems.
• Robust Output Drive: 5.2mA sink/source current ensures reliable signal integrity.
• Input Flexibility: Accepts low-level inputs (0.5V–1.8V) and high-level inputs (1.5V–4.2V).
• Durable Packaging: 14-pin DIP for easy through-hole PCB assembly; MSL: Not Applicable for moisture resilience.

CD74HC27E Applications

• Digital Logic Systems: Used in combinational logic circuits, signal gating, and Boolean function implementations.
• Industrial Control: Reliable for PLC interfaces, safety interlocks, and fault detection due to noise immunity.
• Consumer Electronics: Integrates into remote controls, timers, and display drivers where low power is critical.
• Automotive Electronics: Suitable for sensor signal conditioning and ECU logic due to wide voltage tolerance.
• Embedded Systems: Ideal for microcontroller-based projects requiring fast, glitch-free logic operations.

Conclusion of CD74HC27E

The CD74HC27E stands out for its speed, power efficiency, and versatility in NOR gate applications. Its wide operating voltage range and high noise immunity make it a robust choice for industrial, automotive, and consumer electronics. Compared to similar models, its low quiescent current and strong output drive offer superior performance in energy-sensitive designs. Engineers favor this IC for space-constrained, high-reliability systems where fast signal processing and durability are paramount.