74AC521MTC

Overview

The onsemi 74AC521MTC is an octal identity comparator housed in a 20-TSSOP package. It features eight independent comparison channels with low-active outputs that assert when input pairs are equal. The device operates within a supply voltage range of 2V to 6V and supports a maximum operating temperature of +85°C. It provides low-active outputs for A=B detection, suitable for digital logic verification tasks.

Feature Summary

• Octal configuration providing eight independent bit comparisons
• Low-active output assertion upon input equality detection
• TTL-compatible input levels for broad system integration

Applications

• Digital data bus integrity verification
• Memory address matching circuits
• Logic state comparison modules

Procurement Notes

Verify component status as the 74AC521MTC is listed as obsolete or end-of-life by the manufacturer. Confirm availability through authorized distributors or secondary market sources. Ensure replacement strategies account for potential supply chain discontinuations and validate pinout compatibility if substituting with newer variants.

Selection Notes

Select this component for applications requiring parallel data comparison rather than buffering or driving. Consider the 74AC series performance characteristics regarding speed and voltage tolerance. Evaluate alternative active parts if long-term procurement stability is required, as this specific part number may no longer be in active production.

Part Context

This component belongs to the 74AC logic family, designed for high-speed CMOS operations. It serves as a specialized digital comparator distinct from buffer drivers like the 74AC541. The TSSOP-20 package facilitates surface-mount assembly in compact electronic designs requiring multiple simultaneous comparison functions.