SN74F521DW

Comparators Overview

The SN74F521DW is an octal binary/BCD identity comparator manufactured by Texas Instruments in the SN74F logic family. It features eight independent comparison circuits housed in a 20-pin SOIC package. The device performs A=B equality checks with active-low outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports propagation delays ranging from 4.6 ns to 6.6 ns. Maximum power supply current is 32 mA, and it functions reliably between 0°C and +70°C.

Comparators Feature Summary

• Performs octal binary or BCD identity comparisons for equality detection
• Provides active-low output signals indicating match conditions
• Compatible with standard TTL input levels

Comparators Applications

• Digital data validation systems
• Memory address matching circuits
• Control logic verification

Comparators Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm package type and tape/reel specifications. Ensure the component meets RoHS requirements if applicable to your assembly process. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm that the operating temperature range aligns with your system's environmental constraints before finalizing procurement.

Comparators Selection Notes

Select this component when designing systems requiring parallel data equality checks using the SN74F series speed characteristics. Consider the active-low output polarity during interface design with downstream logic gates. Evaluate the 20-pin SOIC footprint compatibility with your PCB layout constraints. Verify that the 4.5 V to 5.5 V supply requirement matches your system's power distribution network.

Comparators Part Context

This part belongs to the SN74F logic family, known for high-speed performance compared to standard LS variants. It is functionally similar to other octal comparators but distinguished by its specific F-series electrical characteristics and active-low output configuration. The DW package denotes a plastic small-outline integrated circuit variant suitable for surface-mount assembly technologies.

Comparators Replacement Considerations

The SN74F521DWR is a reel-packaged version of the same functional device. Direct substitutes may include other octal identity comparators from compatible logic families, provided pinouts and electrical parameters such as propagation delay and supply voltage are verified against the original datasheet.