N74F521D,623

Comparators Overview

The N74F521D,623 is an 8-bit identity comparator from the NXP 74F series. It features inverted outputs that activate when input A equals input B. The device operates within a supply voltage range of 4.5V to 5.5V and delivers standard output currents of 1mA (high) and 20mA (low). It exhibits a maximum propagation delay of 9.5ns at 5V with 50pF load. Packaged in a 20-pin SOIC (0.295" width), it functions reliably between 0°C and 70°C.

Comparators Feature Summary

• Performs 8-bit magnitude comparison with active-low output assertion upon equality detection
• Provides high-drive capability with 20mA low-level output current for robust signal integrity
• Utilizes F/FAST logic technology to achieve fast switching speeds suitable for high-frequency digital systems

Comparators Applications

• Digital address decoding and matching circuits
• Data validation and error checking modules
• System configuration verification interfaces

Comparators Procurement Notes

Verify component authenticity through authorized NXP distributors or certified agents. Confirm RoHS3 compliance and REACH status prior to integration. Check for obsolete status indicators as availability may be limited. Ensure storage conditions adhere to moisture sensitivity level 1 requirements to prevent package damage during soldering processes.

Comparators Selection Notes

Select this component for applications requiring precise 8-bit equality checks with fast response times. The 20-SOIC package suits surface-mount designs with moderate pin density needs. Consider the 9.5ns delay for timing-critical paths. Evaluate power consumption against system constraints given the 5V operation range and standard drive capabilities.

Comparators Part Context

Part of the NXP 74F family, known for high-speed performance compared to standard TTL. The 74F521 specifically addresses identity comparison needs in complex digital architectures. It complements other logic gates by providing dedicated comparison functionality without external resistor networks.

Comparators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs before considering alternative manufacturers or updated series components.