54AC2525WRQMLV

Overview

The National Semiconductor 54AC2525WRQMLV is a high-speed CMOS clock driver designed for radiation-hardened aerospace applications. It provides one input to eight outputs with AC-CMOS logic levels. The device operates on a 3.3 V or 5 V supply and features a typical propagation delay of 11 ns. It is housed in a hermetic ceramic DIP-14 package suitable for military temperature ranges from -55 °C to +125 °C. This component meets SMD specifications and offers immunity to single event latch-up and upset, ensuring reliability in harsh environments.

Feature Summary

• Radiation hardened to 300 krad (Si) total ionizing dose
• Immune to single event latch-up up to 110 MeV.cm²/mg
• Hermetic ceramic DIP-14 package construction
• High-speed AC-CMOS technology with 11 ns propagation delay

Applications

• Aerospace satellite clock distribution systems
• Military avionics timing circuits
• Spacecraft data bus interfaces requiring radiation tolerance

Part Context

This part belongs to the 54ACxxxx series of high-speed CMOS functions specifically engineered for the aerospace industry. The 'W' suffix indicates a wide temperature range, while 'RQMLV' denotes qualification under the QML-V standard. It is manufactured by National Semiconductor, now part of Texas Instruments, maintaining heritage MIL-spec performance standards.

Replacement Considerations

Direct replacements must match the 54AC2525 logical function and radiation hardness requirements. Verify that substitute components are also QML-V qualified and available in hermetic DIP-14 packages. Cross-reference specific pinouts and electrical characteristics to ensure compatibility with existing PCB layouts.