QS74FCT521DTS0

Comparators Overview

The QS74FCT521DTS0 is an 8-bit identity comparator from the FCT series, manufactured by Quality Semiconductor. It compares two 8-bit binary inputs to determine equality (A=B). The device features active-low outputs and operates within a supply voltage range of 4.75 V to 5.25 V. It is housed in a TSOP-20 surface-mount package and supports industrial temperature ranges.

Comparators Feature Summary

• Performs 8-bit binary identity comparison
• Provides active-low output signals for equality detection
• Compatible with standard CMOS logic families

Comparators Applications

• Digital data path validation
• Memory address matching circuits
• System configuration verification

Comparators Procurement Notes

Verify the specific manufacturer source, as Quality Semiconductor assets are often managed by Rochester Electronics. Confirm the RoHS compliance status and exact package marking against the official datasheet. Ensure the active-low output polarity matches the system design requirements before integration.

Comparators Selection Notes

Select this component when an 8-bit equality check is required in high-speed digital systems. The FCT series offers fast propagation delays suitable for modern logic interfaces. Consider the TSOP-20 package constraints for PCB layout and ensure the 5V supply rail stability meets the specified operating range.

Comparators Part Context

This part belongs to the FCT (Fast CMOS) family, designed for high-speed operation with CMOS compatibility. Identity comparators like the QS74FCT521DTS0 are essential for verifying data integrity and address alignment in complex digital architectures without requiring external microprocessor intervention.

Comparators Replacement Considerations

Check for equivalents such as the 74FCT521ATQG from Renesas Electronics, which shares similar 8-bit identity comparator functionality and TSOP-20 packaging. Verify pinout compatibility and electrical specifications before substitution.