74FCT521CTQG8

Overview

The 74FCT521CTQG8 is an 8-bit identity comparator from the Renesas 74FCT series, housed in a 20-pin QSOP package. It operates within a supply voltage range of 4.75 V to 5.25 V and supports an operating temperature range of -40°C to +85°C. The device features active low outputs indicating equality (A=B) between two 8-bit inputs. Propagation delays are specified at 6 ns and 7.2 ns under standard conditions, with a maximum supply current of 4.5 mA.

Feature Summary

• Provides logic function for comparing two 8-bit binary words to determine equality
• Features active low output signaling when input vectors A and B are identical
• Ensures true TTL input and output compatibility with typical high-level output voltage of 3.3V
• Maintains CMOS power consumption levels with low input and output leakage currents

Applications

• Digital data path comparison circuits
• Address matching logic in memory systems
• Control logic requiring equality verification of parallel data buses

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific manufacturing date codes relevant to project requirements. Review official datasheets for pinout configurations and electrical characteristics prior to integration into final designs.

Selection Notes

Select this component for applications requiring precise 8-bit equality checking with TTL-compatible interfaces. Consider the 20-pin QSOP package for surface mount assembly constraints. Evaluate propagation delay specifications against system timing requirements to ensure signal integrity across the digital bus architecture.

Part Context

This part belongs to the 74FCT logic family, designed for high-speed CMOS applications with TTL compatibility. It serves as a specialized comparator within the broader portfolio of digital logic integrated circuits offered by Renesas Electronics Corporation for industrial and commercial electronic systems.

Replacement Considerations

The IDT74FCT521ATQ is listed as an alternative part number for this component. Verify functional equivalence and pin compatibility before substitution.