DM74ALS520N

Comparators Overview

The DM74ALS520N is an 8-bit identity comparator manufactured by Fairchild Semiconductor. It compares two 8-bit binary values and outputs an active-low signal when the inputs are identical. The device operates within a voltage range of 4.5V to 5.5V. Key electrical parameters include a maximum propagation delay of 20ns at 5V with 50pF load, output high current of 2.6mA, and output low current of 24mA. It functions in an operating temperature range of 0°C to 70°C.

Comparators Feature Summary

• Performs 8-bit binary identity comparison
• Provides active-low output for matching inputs
• Compatible with standard 74ALS logic families

Comparators Applications

• Digital system data validation
• Address decoding circuits
• Comparator logic in microprocessor interfaces

Comparators Procurement Notes

Verify the manufacturer marking matches Fairchild Semiconductor or its authorized successors. Confirm the package type is 20-DIP (0.300 inch width). Check RoHS compliance status if required for specific manufacturing standards. Ensure the part number suffix 'N' corresponds to the through-hole DIP variant.

Comparators Selection Notes

Select this component when an 8-bit identity comparison function is required within the 74ALS logic family. It is suitable for applications needing fast propagation delays around 20ns. Consider the 20-pin DIP package for prototyping or legacy board designs requiring through-hole mounting.

Comparators Part Context

This part belongs to the 74ALS series of high-speed CMOS logic devices. The DM prefix typically indicates military or extended temperature grade variants in some contexts, but datasheets specify 0°C to 70°C operation. It serves as a digital comparator within the broader 74xx logic ecosystem.

Comparators Replacement Considerations

Check for equivalents like SN74ALS520N from Texas Instruments. Verify pin compatibility and electrical specifications before substitution. Ensure the replacement supports the same 8-bit comparison functionality and package dimensions.