74FCT521ATSOG

Overview

The 74FCT521ATSOG is an 8-bit identity comparator from the Renesas 74FCT series, housed in a 20-SOIC package. It operates within a supply voltage range of 4.75 V to 5.25 V and supports a maximum propagation delay of 7.2 ns at 5 V with 50 pF load. The device features active low outputs indicating equality (A=B) between two 8-bit inputs. It draws a maximum quiescent current of 10 µA and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Provides active low output indication when two 8-bit input vectors are identical
• Ensures true TTL input and output compatibility for direct interfacing
• Maintains CMOS power consumption levels with low leakage characteristics

Applications

• Digital data bus monitoring for parity or address matching
• System configuration verification in embedded controllers
• Memory address decoding and validation circuits

Procurement Notes

Verify the specific suffix ATSOG confirms the 20-SOIC tube or reel packaging variant required for your assembly process. Confirm RoHS3 compliance status as per the latest manufacturer documentation. Ensure the operating temperature grade matches your environmental design constraints before finalizing procurement orders.

Selection Notes

Select this component when precise 8-bit equality checking is required with minimal propagation delay. The FCT logic family offers superior speed compared to standard LS counterparts while maintaining low power dissipation. Verify that the 20-SOIC footprint aligns with your PCB layout constraints and thermal management requirements.

Part Context

This part belongs to the 74FCT logic family, designed for high-speed digital applications requiring CMOS efficiency. The 74FCT521 specifically addresses identity comparison needs, serving as a critical component in systems requiring rapid data validation. It complements other FCT devices like bus transceivers and registers in complex digital architectures.

Replacement Considerations

The IDT74FCT521ATSOG8 is a documented alternate part number for this component. Verify pinout compatibility and electrical specifications against the original datasheet before substitution. Ensure the replacement source maintains equivalent manufacturing quality standards.