74HC21 Dual 4-input AND Gate IC (DIP-14 Package)

74HC21 Dual 4-Input AND Gate IC is a high-performance CMOS logic integrated circuit designed for advanced digital logic operations. It integrates two independent 4-input AND gates within a single package, making it ideal for logic control, signal gating, and combinational logic designs. Built using High-Speed CMOS (HC) technology, the 74HC21 offers low power consumption, high noise immunity, and fast switching speeds, making it suitable for modern digital and embedded systems.

The 74HC21 IC operates over a wide voltage range and is fully TTL-compatible, allowing seamless interfacing with existing digital circuits. Its compact design and reliable performance make it a preferred choice for engineers, students, and hobbyists working on microcontroller-based systems, industrial automation, consumer electronics, and educational electronics projects.

Key Features of 74HC21 Dual 4-Input AND Gate IC

• Dual 4-Input AND Gates
  Contains two independent AND gates, each capable of processing four digital inputs simultaneously.

• High-Speed CMOS Technology
  Offers faster propagation delay compared to standard CMOS while maintaining low power consumption.

• Wide Operating Voltage Range
  Operates reliably from 2V to 6V, making it suitable for both low-voltage and standard logic applications.

• Low Power Consumption
  CMOS design ensures minimal static power dissipation, ideal for battery-powered devices.

• High Noise Immunity
  Provides excellent resistance to electrical noise, ensuring stable logic operation.

• TTL Compatible Inputs
  Can interface easily with TTL logic families without additional components.

• Compact DIP / SOIC Package Options
  Available in through-hole and surface-mount packages for flexible PCB design.

Specifications of 74HC21 Dual 4-Input AND Gate IC

Functional Overview

Each AND gate in the 74HC21 IC produces a HIGH output only when all four inputs are HIGH. If any input is LOW, the output remains LOW. This functionality is essential for control logic, decision-making circuits, and conditional signal enabling.

The IC’s dual-gate configuration reduces component count and PCB space, simplifying circuit design while improving reliability.

Applications of 74HC21 Dual 4-Input AND Gate IC

The 74HC21 IC is widely used in various digital and embedded system applications, including:

• Digital Logic Circuits
  Used in combinational logic designs, logic condition checks, and Boolean function implementation.

• Microcontroller and Embedded Systems
  Acts as a signal-conditioning or logic-combining component for GPIO and control signals.

• Industrial Control Systems
  Enables interlock logic, safety conditions, and process control decision making.

• Clock and Timing Circuits
  Used for clock gating and timing control applications.

• Consumer Electronics
  Applied in appliances, audio/video equipment, and remote control systems.

• Educational and Training Projects
  Ideal for teaching digital electronics, logic gates, and IC interfacing in laboratories.

• Automation and Robotics
  Helps in sensor fusion, logic decision paths, and actuator control logic.

Why Choose 74HC21 Dual 4-Input AND Gate IC?

• Reduces component count with dual gate functionality

• Ensures fast and reliable logic operation

• Suitable for low-power and high-speed designs

• Easy integration with TTL and CMOS systems

• Proven reliability for industrial and educational use

The 74HC21 Dual 4-Input AND Gate IC is a versatile, reliable, and energy-efficient logic solution for a wide range of digital applications. Whether you are designing complex logic circuits, building embedded systems, or teaching digital electronics concepts, this IC delivers consistent performance with minimal power consumption and high noise immunity. Its compact design and wide compatibility make it an essential component in any electronics toolkit.

Package Includes:

1 x 74HC21 Dual 4-input AND Gate IC (DIP-14 Package)

FAQ

1. Where can we buy this 74HC21 Dual 4-input AND Gate IC?

This product is available online https://aiiottech.in/product/74hc21-dual-4-input-and-gate-ic/ and also available at our store in Pudupakkam/Kelambakkam, Chennai-603103

2. When can I get this 74HC21 Dual 4-input AND Gate IC after placing the order?

RGRJ AIIoT TECHNOLOGIES will immediately ship and deliver the product within 1-3 working days.

Video Link: 74HC21 Dual 4 input AND Logic Gate Integrated Circuit IC