SN74F21N

Overview

The SN74F21N is a dual 4-input positive-AND gate manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V and features a propagation delay of 5.1ns at 5V with 50pF load. The device provides high-level output current of 1mA and low-level output current of 20mA, with a maximum static current of 4.3mA. It supports an operating temperature range from 0°C to 70°C and is housed in a 14-SOIC surface-mount package.

Feature Summary

• Dual independent 4-input AND logic gates
• High-speed operation with 5.1ns propagation delay
• Push-pull output stage for strong drive capability

Applications

• Digital logic circuit design
• Signal processing systems
• Computer peripheral interfaces

Procurement Notes

Verify the specific manufacturer datasheet revision to confirm exact electrical characteristics and pinout configurations. Ensure compatibility with system voltage levels and thermal requirements before integration. Cross-reference official documentation for any updates regarding RoHS compliance or material declarations.

Selection Notes

Select this component for applications requiring fast switching speeds and precise logic gating. The SOIC package facilitates automated surface-mount assembly. Evaluate the 20mA low-level sink current against load requirements to ensure reliable signal transmission without exceeding device limits.

Part Context

This part belongs to the SN74F series of high-speed CMOS-compatible logic devices. It serves as a fundamental building block for complex digital systems where rapid decision-making based on multiple input conditions is necessary. The F series is known for its balance between speed and power consumption.

Replacement Considerations

SN74F21D is listed as a parameter-equivalent alternative.