74FCT825ASC

Overview

The National Semiconductor 74FCT825ASC is an octal bus interface flip-flop featuring D-type storage with tri-state outputs. It operates within a supply voltage range of 4.75 V to 5.25 V and supports single-ended inputs. The device provides non-inverting logic functionality with a typical propagation delay of 12.5 ns. Output drive capabilities include -32 mA for high-level and 64 mA for low-level currents. It is housed in a 24-pin QSOP package and functions as a single circuit containing eight bits of data storage.

Feature Summary

• Octal D-type flip-flop architecture providing eight-bit parallel data storage capability
• Tri-state output configuration enabling efficient bus interfacing and system isolation
• CMOS FCT technology ensuring compatibility with standard logic families

Applications

• High-speed data buffering in computer systems
• Bus interface circuits requiring parallel-to-serial conversion
• Memory register applications in embedded controllers

Procurement Notes

Verify the manufacturer designation carefully, as Texas Instruments acquired National Semiconductor's logic business. Confirm that the specific suffix 'ASC' corresponds to the intended package variant and temperature rating. Ensure the component meets RoHS compliance requirements if applicable to your assembly process. Cross-reference the datasheet revision date to confirm electrical characteristics match current design specifications.

Selection Notes

Select this component when designing systems requiring octal storage with high-speed tri-state outputs. Consider the 12.5 ns propagation delay for timing constraints. Evaluate the 24-pin QSOP package dimensions against available PCB space. Verify power supply stability within the 4.75 V to 5.25 V range to ensure reliable operation under varying load conditions.

Part Context

This part belongs to the 74FCT series, which bridges the performance gap between standard TTL and advanced CMOS technologies. The 74FCT825 specifically addresses the need for wide data path storage in bus-oriented architectures. It serves as a critical interface element between microprocessors and peripheral devices or memory arrays.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.