STMicroelectronics M74HC21B1 Dual 4-Input AND Gate

The M74HC21B1 is a high-speed CMOS dual 4-input AND gate integrated circuit manufactured by STMicroelectronics. Designed to operate with a power supply range of 2V to 6V, this device offers the optimal balance between speed and power consumption, making it an ideal choice for a wide range of logic interfacing applications, including mobile devices, computers, and industrial control systems.

Constructed with silicon gate CMOS technology, the M74HC21B1 ensures that its quiescent current is virtually independent of the operating voltage, providing a more consistent performance across different voltages. This feature is particularly beneficial for battery-operated devices where power efficiency is crucial.

The device boasts a symmetrical output impedance, which means that both high and low state outputs can drive the same amount of current, typically +/− 4mA at 5V. This symmetrical nature allows for improved signal integrity and reduced noise on the lines. Additionally, the M74HC21B1 is characterized by a high noise immunity, which is a significant advantage in electrically noisy environments.

The inputs of the M74HC21B1 are designed to tolerate high voltages, allowing it to interface with systems operating at different voltage levels without the need for external components. This high input voltage feature also provides enhanced protection against electrostatic discharge, thereby improving the longevity and reliability of the device.

For ease of implementation in various circuit designs, the M74HC21B1 is available in multiple package options, including DIP, SOIC, and TSSOP. Its pin configuration is standardized, ensuring compatibility with other logic devices and simplifying the design process.

As with all STMicroelectronics products, the M74HC21B1 is manufactured to meet the highest quality and reliability standards. Its compliance with JEDEC standards underscores its suitability for use in commercial, industrial, and military-grade applications. Whether you are designing a complex microprocessor system or a simple logic gate circuit, the M74HC21B1 is a reliable and efficient solution for your AND gate logic needs.