SN74F521NSR

Comparators Overview

The SN74F521NSR is an octal binary/BCD identity comparator manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features active-low outputs. The device is housed in a 20-pin SOIC package and supports surface-mount installation. Propagation delays are specified at 4.6 ns, 6.1 ns, and 6.6 ns. Maximum power supply current is 32 mA, with an operating temperature range from 0°C to +70°C.

Comparators Feature Summary

• Performs identity comparison between two 8-bit binary or BCD inputs
• Provides active-low output signals when input pairs are equal
• Includes enable functionality for controlled data path operation

Comparators Applications

• Digital system data validation
• Memory address matching
• Control logic equality checking

Comparators Procurement Notes

Verify the specific suffix 'NSR' corresponds to the SOIC-20 package and reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure voltage levels match system requirements of 4.5 V to 5.5 V. Check for any recent product change notices affecting pinout or electrical characteristics.

Comparators Selection Notes

Select this component for applications requiring high-speed octal comparison with active-low outputs. Consider propagation delay specifications relative to system clock speeds. Evaluate power consumption limits against available thermal management capabilities. Verify package compatibility with existing PCB footprint designs.

Comparators Part Context

This part belongs to the SN74F series of fast logic comparators. It provides eight independent identity comparison channels in a single integrated circuit. The design supports standard TTL input levels and offers robust performance for digital logic applications requiring parallel data verification.

Comparators Replacement Considerations

SN74ALS521NSR serves as a compatible alternative within the same family, offering similar functionality with different speed and power characteristics.