SN74F21DR

Overview

The SN74F21DR is a dual four-input AND gate integrated circuit manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V and features a maximum propagation delay of 5.1ns at 5V with a 50pF load. The device supports output currents of 1mA (high) and 20mA (low), with a maximum static current of 4.3mA. It functions in an operating temperature range of 0°C to 70°C and is housed in a 14-SOIC surface-mount package.

Feature Summary

• Dual independent four-input AND logic gates
• High-speed switching performance with low propagation delay
• Standard TTL-compatible logic levels

Applications

• Digital logic circuits requiring multi-input AND operations
• Data routing and selection systems
• Control logic for microprocessor interfaces

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type, tape-and-reel specifications, and environmental compliance status. Ensure the component matches the required logic family characteristics and thermal ratings for the intended application environment before finalizing procurement.

Selection Notes

Select this component when dual four-input AND functionality is required in a compact surface-mount form factor. Consider the 74F series speed-power trade-offs relative to system timing requirements. Verify that the 14-pin SOIC footprint aligns with the PCB layout constraints and that the operating temperature range meets the design specifications.

Part Context

This part belongs to the Texas Instruments 74F series, known for high-speed operation compared to standard 74LS logic. The 'D' suffix indicates a 14-lead Small Outline Integrated Circuit (SOIC) package. It is designed for general-purpose digital applications where moderate power consumption and fast switching speeds are prioritized.

Replacement Considerations

The SN74F21D is listed as a parameter-equivalent alternative from Texas Instruments.