Texas Instruments

SN74HC21DR  

Gates and Inverters

SN74HC21DR Description

The SN74HC21DR is a high-performance AND gate logic IC designed by Texas Instruments. This device is part of the 74HC series, known for its robustness and reliability in digital logic applications. The SN74HC21DR features two independent 4-input AND gates, making it suitable for a wide range of digital circuits where multiple input signals need to be processed simultaneously.

The SN74HC21DR operates within a supply voltage range of 2V to 6V, providing flexibility in power supply requirements. It has a maximum propagation delay of 19ns at 6V with a load capacitance of 50pF, ensuring fast signal processing and minimal delay in logic operations. The input logic levels are well-defined, with low levels ranging from 0.5V to 1.8V and high levels from 1.5V to 4.2V, allowing for compatibility with various digital systems.

This IC is designed for surface mount applications, making it ideal for compact and high-density PCB designs. It is available in a Tape & Reel (TR) package, which simplifies manufacturing and assembly processes. The SN74HC21DR also boasts low quiescent current, up to a maximum of 2 µA, and balanced output current capabilities of 5.2mA for both high and low states, ensuring stable performance under different load conditions.

SN74HC21DR Features

• High-Speed Performance: With a maximum propagation delay of 19ns at 6V and 50pF, the SN74HC21DR ensures rapid signal processing, making it suitable for high-speed digital applications.
• Wide Operating Voltage Range: The device operates within a 2V to 6V supply voltage range, providing flexibility and compatibility with various power supply systems.
• Low Power Consumption: The IC has a maximum quiescent current of 2 µA, contributing to energy efficiency and reduced power consumption in digital circuits.
• Balanced Output Current: The SN74HC21DR offers balanced output current capabilities of 5.2mA for both high and low states, ensuring stable performance under different load conditions.
• Surface Mount Compatibility: Designed for surface mount applications, this IC is ideal for compact and high-density PCB designs, enhancing space efficiency.
• Environmental Compliance: The SN74HC21DR is REACH unaffected and RoHS3 compliant, ensuring it meets stringent environmental standards and regulations.

SN74HC21DR Applications

The SN74HC21DR is versatile and can be used in a variety of digital logic applications, including:

• Digital Signal Processing: Ideal for processing multiple input signals in digital systems, such as microcontrollers, CPUs, and other digital circuits.
• Control Systems: Suitable for use in control systems where multiple inputs need to be evaluated to generate a control signal.
• Data Processing: Can be used in data processing applications where multiple input conditions must be met to trigger an action.
• Communication Systems: Useful in communication systems for signal processing and control logic.
• Consumer Electronics: Applicable in consumer electronics where compact and efficient digital logic is required.

Conclusion of SN74HC21DR

The SN74HC21DR is a high-performance AND gate logic IC that offers a combination of speed, flexibility, and low power consumption. Its wide operating voltage range, low quiescent current, and balanced output current capabilities make it a reliable choice for a variety of digital applications. The surface mount compatibility and environmental compliance further enhance its appeal for modern electronics design. Whether used in digital signal processing, control systems, or consumer electronics, the SN74HC21DR provides a robust and efficient solution for digital logic requirements.

SN74HC21DR Documents

Download datasheets and manufacturer documentation for SN74HC21DR

PCN Assembly/Origin :

Fab Site 07/Aug/2020      

Datasheets :

SN54HC21, SN74HC21      

PCN Packaging :

Reels 19/Apr/2018       Reel 10/Jul/2018      

HTML Datasheet :

SN54HC21, SN74HC21      

PCN Design/Specification :

Design 25/Feb/2022       CD74HC/SN74HC 11/Aug/2021