DM74ALS520WMX

Comparators Overview

The DM74ALS520WMX is an Advanced Low Power Schottky (ALS) 8-bit identity comparator manufactured by Fairchild Semiconductor. It performs an equal-to comparison of two 8-bit words with provisions for expansion or external enabling. The device operates within a supply voltage range of 4.5V to 5.5V and features low-active outputs indicating when inputs A and B are equal. It utilizes a 20-SOIC surface-mount package with a width of 7.50mm. The component exhibits a maximum propagation delay of 20ns at 5V with a 50pF load, supporting high-speed digital logic applications.

Comparators Feature Summary

• Performs equality comparison between two 8-bit binary words
• Features low-active output status indication
• Supports cascading expansion for multi-word comparisons
• Includes provision for external enabling control

Comparators Applications

• Digital data validation circuits
• Memory address matching systems
• Microprocessor interface logic
• Asynchronous bus monitoring

Comparators Procurement Notes

Verify the specific manufacturer origin as the part may be sourced from onsemi following corporate restructuring. Confirm the RoHS compliance status and environmental classification prior to integration. Ensure the 20-SOIC footprint matches the target PCB design constraints. Validate that the ALS logic family characteristics align with the system's power and speed requirements.

Comparators Selection Notes

Select this component for designs requiring precise 8-bit word equality detection within standard TTL voltage levels. The ALS technology offers a balance of speed and power consumption suitable for general-purpose logic. Consider the availability of direct substitutes if long-term supply stability is required. Evaluate the package dimensions against available board space.

Comparators Part Context

This component belongs to the 74ALS series of logic integrated circuits, known for advanced low-power Schottky performance. The DM74ALS520 specifically addresses the need for parallel data comparison in digital systems. It serves as a functional equivalent to other industry-standard 8-bit comparators within the same logic family tier.

Comparators Replacement Considerations

Public confirmed substitute part numbers include SN74ALS520DW from Texas Instruments.