SN74HC21N TI Dual 4-Input AND Gate IC DIP-14 Pack of 5

Description

Product Overview

The SN74HC21N is a high‑speed CMOS logic device from Texas Instruments that integrates two independent 4‑input AND gates into a single 14‑lead DIP package. Designed for a broad operating voltage range of 2 V to 6 V, this IC delivers reliable performance in both low‑power and high‑speed applications. Its typical propagation delay of 11 ns ensures rapid signal processing, while the low 20 µA maximum supply current helps to keep overall system power consumption to a minimum. The device can source or sink up to ±4 mA at a 5 V supply, allowing it to drive up to ten LSTTL loads, which makes it suitable for interfacing with a variety of legacy and modern digital circuits. The DIP‑14 form factor is breadboard‑friendly, facilitating quick prototyping and easy integration into both hobbyist projects and professional designs.

Usage

Engineers and designers often require compact, reliable logic gates for applications ranging from simple combinational circuits to complex state machines. The SN74HC21N excels in environments where space is at a premium, such as handheld devices, automotive control modules, and industrial instrumentation. Its wide voltage tolerance enables operation in battery‑powered devices as well as in systems powered by regulated supplies. The low power draw makes it an excellent choice for energy‑constrained applications, including remote sensors and IoT nodes. Additionally, the ability to drive multiple LSTTL loads simplifies board layout by reducing the need for additional buffering stages, which can further lower cost and improve overall reliability.

In educational settings, the SN74HC21N provides a practical example of multi‑input logic functions, allowing students to experiment with truth tables, timing analysis, and signal integrity concepts. Its robust construction and TI’s reputation for quality assure that the component will perform consistently across a wide temperature range, making it a dependable teaching tool for both undergraduate labs and advanced research projects.

Why Choose Us

Choosing the SN74HC21N from Texas Instruments means selecting a component that benefits from decades of semiconductor expertise, rigorous testing, and a global support network. TI’s manufacturing processes guarantee tight parameter tolerances, ensuring that each gate operates within the specified propagation delay and output drive specifications. This consistency is critical for designers who need predictable timing across multiple boards or when scaling production volumes.

Our distribution channels provide fast, reliable shipping and comprehensive after‑sales support. Whether you need technical assistance for schematic integration, help with troubleshooting, or guidance on optimal PCB layout practices, our knowledgeable support team is ready to assist. We also offer flexible packaging options, including the convenient pack of five units, which delivers cost savings for developers ordering in small to medium quantities.

Quality assurance is reinforced by TI’s extensive reliability testing, covering temperature cycling, humidity exposure, and electrostatic discharge (ESD) resilience. This rigorous validation process translates into a longer product lifespan and reduced field failures, giving you confidence in the long‑term performance of your designs.

Finally, our commitment to sustainability means that the SN74HC21N is manufactured using environmentally responsible processes, aligning with industry standards for RoHS compliance and reducing the ecological impact of electronic component production.

Key Features

• Two independent 4‑input AND gates provide flexible logic design options in a single compact package.
• Wide operating voltage range of 2 V to 6 V supports both low‑power and high‑performance applications.
• Low 20 µA supply current helps minimize overall system power consumption.
• Fast 11 ns typical propagation delay ensures rapid signal processing for time‑critical circuits.
• Robust after‑sales support and technical assistance from TI and our dedicated service team.

FAQ

What is the maximum number of loads the SN74HC21N can drive?

The device can source or sink up to ±4 mA at a 5 V supply, which translates to driving up to ten standard LSTTL loads while maintaining reliable logic levels.

Is the SN74HC21N suitable for battery‑operated devices?

Yes. Its low 20 µA typical supply current and wide voltage range of 2 V to 6 V make it an excellent choice for battery‑powered applications where power efficiency is critical.

Can the SN74HC21N be used in high‑temperature industrial environments?

The IC is rated for operation across a broad temperature range and has undergone extensive reliability testing, making it suitable for many industrial settings that require stable performance under varying thermal conditions.

Do I need additional buffering when using the SN74HC21N with other logic families?

In most cases the built‑in output drive capability is sufficient to interface directly with TTL and LSTTL families. However, for very high‑fan‑out designs or when driving long traces, adding a dedicated buffer can further improve signal integrity.

How does the DIP‑14 package benefit prototyping?

The DIP‑14 form factor is breadboard‑friendly, allowing quick insertion into standard prototyping boards without the need for specialized sockets or reflow soldering, which speeds up development cycles.