SN74F521NS

Comparators Overview

The SN74F521NS is an octal binary/BCD identity comparator manufactured by Texas Instruments. It features active low outputs that indicate when input A equals input B. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports surface mount installation in a 20-SOIC package. Propagation delays are specified at 4.6 ns, 6.1 ns, and 6.6 ns depending on conditions. Maximum power supply current is 32 mA, with operating temperatures ranging from 0°C to +70°C.

Comparators Feature Summary

• Octal identity comparison functionality for eight-bit data words
• Active low output signaling for equality detection
• High noise immunity characteristic of the 74F logic series

Comparators Applications

• Digital data path monitoring systems
• Memory address matching circuits
• Control logic verification modules

Comparators Procurement Notes

Verify the specific suffix 'SR' against the manufacturer's official documentation to confirm reel packaging specifications and tape dimensions. Ensure the component meets RoHS compliance requirements as indicated in the datasheet. Cross-reference the ordering part number with Texas Instruments to validate availability status and production lifecycle stage before finalizing procurement plans.

Comparators Selection Notes

Select this component for applications requiring precise equality checking of two eight-bit digital inputs. The active low output simplifies interfacing with subsequent logic stages. Consider the 74F series speed characteristics relative to system timing requirements. Verify that the SOIC-20 package footprint aligns with the printed circuit board design constraints.

Comparators Part Context

This device belongs to the Texas Instruments 74F series of high-speed logic comparators. It serves as a specialized integrated circuit for digital electronics, providing reliable identity comparison capabilities. The SN74F521NS variant specifically denotes the surface mount plastic small outline package configuration suitable for automated assembly processes.

Comparators Replacement Considerations

Consult official substitution guides for compatible parts such as the SN74F521N or SN74F521NSR. Verify pin compatibility and electrical parameters before swapping components. Ensure the replacement maintains the same logic family characteristics and package dimensions.