54H05FM

Overview

The 54H05FM is a high-speed logic integrated circuit manufactured by National Semiconductor, belonging to the H (High-Speed) series. It functions as a hex inverter, containing six independent single-input inverters within a single package. The device utilizes CMOS technology and is designed for operation with supply voltages of 3.3 V or 5 V. It features an open-drain output configuration, which allows for wired-AND connections and level shifting applications. The component is housed in a ceramic dual flatpack (DFP) package with 14 terminals, suitable for robust industrial environments.

Feature Summary

• Hex inverter architecture providing six independent logic inversion channels
• Open-drain output structure enabling flexible interfacing and bus configurations
• High-speed performance characteristics inherent to the H-series logic family
• Ceramic packaging offering durability and thermal stability

Applications

• Digital signal inversion in high-speed data processing systems
• Bus driver interfaces requiring open-drain termination
• Level shifting between different voltage domains
• Clock signal conditioning in military or aerospace electronics

Procurement Notes

Verify the specific manufacturer source, as National Semiconductor's logic assets were acquired by Texas Instruments. Confirm that the ceramic DFP-14 package matches the design-in requirements. Ensure the open-drain output specification aligns with the target circuit's pull-up resistor needs. Check for RoHS compliance status if required by the end application regulations.

Selection Notes

Select this component when high switching speed is critical compared to standard AC or HC series devices. The open-drain output is essential if wired-logic functionality or voltage translation is needed. The ceramic package is preferred for harsh environments where plastic packages might fail due to moisture or thermal stress. Ensure the system operates within the specified 3.3 V or 5 V supply range.

Part Context

The 54H05FM is part of the broader 54Hxx logic family, which was designed to offer faster propagation delays than the standard 54Sxx Schottky TTL or earlier CMOS families while maintaining compatibility. These components are often found in legacy military, aerospace, and high-reliability industrial equipment where long-term availability and radiation hardness are prioritized over modern low-power alternatives.