SN74HC21DE4

Inverter Gates Overview

The SN74HC21DE4 is a dual four-input positive-AND gate manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range from -40 °C to +85 °C. The device features low static power consumption with a maximum quiescent current of 2 µA. It provides a typical propagation delay of 19 ns at 6 V with a 50 pF load. The output drive capability is specified as ±5.2 mA for both high and low states. The component is housed in a 14-SOIC surface-mount package.

Inverter Gates Feature Summary

• Dual independent four-input AND logic functions integrated into a single package
• CMOS technology ensures low static power dissipation across the operating voltage range
• Wide supply voltage operation compatible with standard digital logic systems
• High noise immunity characteristics inherent to the HC logic family

Inverter Gates Applications

• Digital logic circuit design requiring multiple AND operations
• Data acquisition systems for signal gating
• Industrial control logic interfaces
• Consumer electronics internal logic processing

Inverter Gates Procurement Notes

Verify the specific suffix 'E4' indicates lead-free composition and RoHS compliance per Texas Instruments documentation. Confirm the SOIC-14 package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Cross-reference the datasheet revision date to ensure compatibility with your design standards. Validate that the manufacturer source is authorized.

Inverter Gates Selection Notes

Select this component when dual four-input AND functionality is required in a compact surface-mount format. Consider the 2 V to 6 V supply range for flexibility in system voltage levels. Evaluate the 19 ns propagation delay against your system timing constraints. Compare the ±5.2 mA output drive strength with load requirements. Verify thermal performance within the -40 °C to +85 °C range for your application environment.

Inverter Gates Part Context

This part belongs to the SN74HC series of high-speed CMOS logic devices produced by Texas Instruments. The series is designed for general-purpose digital applications requiring low power and high speed. The SN74HC21 specifically provides two independent four-input AND gates. It is part of the broader 74xx logic family, ensuring pinout and functional compatibility with other industry-standard logic components.

Inverter Gates Replacement Considerations

Compatible substitutes include the SN74HC21DR and SN74HC21PWR from Texas Instruments, which share identical logical functionality and pin configurations. Other manufacturers may offer equivalent parts under different part numbers, but verification of electrical parameters and package dimensions is essential.