74FCT521CTSOG8

Overview

The 74FCT521CTSOG8 is an 8-bit identity comparator from the Renesas 74FCT series, housed in a 20-SOIC package. It operates on a supply voltage of 4.75V to 5.25V with a maximum quiescent current of 10 µA. The device features active-low outputs indicating when input A equals input B. Key electrical parameters include a propagation delay of 4.5ns at 5V with 50pF load and 7.2ns under standard conditions. It supports output currents of 15mA (high) and 48mA (low), functioning within a temperature range of -40°C to +85°C.

Feature Summary

• Provides active-low logic output when two 8-bit inputs are identical
• Features high-speed signal comparison with low propagation delay
• Operates with low static power consumption
• Supports robust output drive capabilities for bus interfacing

Applications

• High-speed data path equality checking
• Address decoding in memory systems
• Digital system status verification
• Bus arbitration logic circuits

Procurement Notes

Verify the specific suffix CTSOG8 against official Renesas documentation to confirm the tape-and-reel packaging configuration and lead-free compliance status. Ensure the ordering part number matches the exact pinout and electrical specifications required for your design, as variations exist within the 74FCT family. Cross-reference manufacturer datasheets for any recent product change notices affecting assembly or material composition.

Selection Notes

Select this component when precise 8-bit magnitude comparison is required with minimal latency. The 74FCT technology offers faster switching speeds compared to standard TTL while maintaining compatible voltage levels. Consider the 20-SOIC package dimensions for PCB layout constraints and verify that the 48mA low-level sink current meets the driving requirements of downstream logic gates in the target application circuit.

Part Context

This device belongs to the 74FCT logic family, designed for high-performance digital applications. It serves as a specialized comparator within Renesas' broad portfolio of logic integrated circuits. The part integrates advanced FET technology to achieve speed advantages over traditional bipolar implementations, making it suitable for modern embedded systems requiring efficient data validation.

Replacement Considerations

The IDT74FCT521ATSOG8 is a documented alternate part number for this component. Verify functional equivalence and pin compatibility before substitution. Other variants in the 74FCT521 series may offer different packaging or electrical characteristics; consult the official datasheet for detailed cross-reference information.