54F574LMQB

Overview

The 54F574LMQB is an octal D-type flip-flop manufactured by National Semiconductor, belonging to the FCT logic series. It features a ceramic chip carrier package with 20 terminals and operates on a single circuit configuration. The device supports a supply voltage range from 4.5 V to 5.5 V and functions within a temperature range of -55°C to +125°C. Key electrical parameters include a propagation delay of 6.5 ns, a low-level output current of 48 mA, and a high-level output current of -15 mA.

Feature Summary

• Octal D-type flip-flop architecture providing eight independent data storage elements.

Applications

Procurement Notes

Verify component authenticity through authorized channels due to potential availability issues. Confirm that the ceramic package matches system requirements for thermal and mechanical stability. Ensure compliance with specific military or industrial standards if applicable, as general commercial variants may differ in qualification levels.

Selection Notes

Select this component when high-speed octal latching is required in harsh environments. The FCT series offers CMOS compatibility with TTL input levels. Verify that the 20-terminal ceramic package fits the PCB layout constraints. Consider the wide operating temperature range for applications exceeding standard commercial limits.

Part Context

This part belongs to the National Semiconductor FCT logic family, designed for high-speed digital applications. It serves as a fundamental building block for data storage and transfer in complex digital systems. The ceramic packaging indicates suitability for demanding environmental conditions compared to plastic alternatives.

Replacement Considerations

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