QS74FCT521DTSO

Comparators Overview

The QS74FCT521DTSO is an 8-bit identity comparator from the FCT series, manufactured by Quality Semiconductor. It operates on a nominal 5 V supply with a range of 4.75 V to 5.25 V. The device features active low outputs and is housed in a TSOP-20 surface-mount package. It supports an operating temperature range of 0°C to 70°C and exhibits propagation delays of 6 ns and 7.2 ns.

Comparators Feature Summary

• Performs 8-bit identity comparison logic
• Provides active low output signals
• Utilizes FCT CMOS technology for high-speed operation

Comparators Applications

• Digital data path validation
• System bus integrity checking
• Address matching circuits

Comparators Procurement Notes

Verify the specific suffix DTSO confirms the TSOP-20 surface mount package and industrial temperature grade. Confirm RoHS3 compliance status as indicated by distributor listings. Ensure the source document explicitly lists Quality Semiconductor as the manufacturer for this part number variant.

Comparators Selection Notes

Select this component when an 8-bit equality check is required with active low signaling. The FCT series offers speed advantages over standard 74LS logic. Verify that the 0°C to 70°C commercial temperature range meets system environmental requirements.

Comparators Part Context

This part belongs to the 74FCT family of high-speed CMOS logic devices. It serves as a specialized comparator within the broader logic IC portfolio, providing dedicated functionality for digital comparison tasks without requiring external gate configurations.

Comparators Replacement Considerations

The 74FCT521ATQG from Renesas Electronics is a documented equivalent part number offering identical 8-bit identity comparison functionality.