JM54AC139BFA

Overview

The JM54AC139BFA is a high-speed CMOS dual 2-to-4 line decoder/demultiplexer from the National Semiconductor 54AC series. Designed for aerospace and military applications, it features radiation hardness up to 100 krads(Si) when qualified under Mil-Prf-38535. The device operates within a voltage range of 2V to 6V and supports temperatures from -55°C to +125°C. It utilizes hermetic packaging to ensure immunity from single event latch-up (SEL) and single event upset (SEU), making it suitable for harsh environmental conditions requiring reliable digital logic decoding.

Feature Summary

• Radiation hardened design capable of withstanding ionizing dose environments
• Immunity to single event latch-up and single event upset effects
• Hermetic packaging for use in severe environmental conditions

Applications

• Aerospace digital logic systems
• Military communication equipment
• Harsh environment data routing

Procurement Notes

Verify that the specific unit carries the correct qualification suffix and package code corresponding to the required radiation hardness level. Confirm compliance with Mil-Prf-38535 specifications and SMD drawings. Ensure the batch history matches the intended operational temperature and radiation tolerance requirements for the target system.

Selection Notes

Select this component when radiation tolerance and SEL immunity are critical requirements for a dual 2-to-4 decoding function. Compare against other 54AC series parts if different logic functions are needed. Verify that the hermetic package option meets the physical size and weight constraints of the application while providing necessary environmental sealing.

Part Context

This part belongs to the 54AC family of high-speed CMOS logic devices. The 'JM' prefix typically denotes a military grade or specific manufacturer lot coding. The '54AC' indicates the speed grade and technology node, offering faster switching than standard 54LS equivalents while maintaining CMOS power efficiency.

Replacement Considerations

Direct replacements include other 54AC139 variants from STMicroelectronics or Texas Instruments that meet the same radiation hardness and hermetic package requirements. Verify pin compatibility and electrical characteristics before substitution.