QS74FCT521DTQ

Comparators Overview

The QS74FCT521DTQ is an 8-bit identity comparator from the FCT series manufactured by Quality Semiconductor. It features active low outputs indicating equality between two 8-bit inputs (A=B). The device operates on a single 5V supply with a voltage range of 4.75V to 5.25V. It utilizes a QSOP package and is designed for high-speed digital logic applications requiring magnitude comparison.

Comparators Feature Summary

• Provides active low output signal when two 8-bit input values are identical
• Operates within standard 5V CMOS logic voltage specifications
• Designed for fast switching performance in digital comparison circuits

Comparators Applications

• Digital data path equality checking
• Address matching in memory systems
• Control logic verification

Comparators Procurement Notes

Verify manufacturer authenticity as Quality Semiconductor products may have specific sourcing channels. Confirm package type QSOP matches design requirements. Check RoHS compliance status if environmental regulations apply. Ensure supply voltage ranges align with system power rails before integration.

Comparators Selection Notes

Select this component when 8-bit equality detection is required with active low signaling. Consider the FCT series speed characteristics for timing constraints. Verify pin compatibility with existing PCB layouts. Evaluate thermal performance if operating near maximum temperature limits.

Comparators Part Context

Part of the 74FCT family offering high-speed CMOS logic functions. The 74FCT521 base design provides 8-bit comparison capabilities. Quality Semiconductor produces variants with different packaging options while maintaining core logical functionality consistent with industry standards for this logic class.

Comparators Replacement Considerations

IDT74FCT521ATQ is a documented alternative from Integrated Device Technology. Verify pinout compatibility and electrical specifications before substitution. Check package differences between QSOP and other available formats.