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Actel has recently implemented enhanced procedures for the qualification and lot acceptance of the radiation-tolerant RTAX-S antifuse FPGAs. These procedures are based on extended testing using highly perceptive designs that stress antifuses within the product. It should be noted that there have been no antifuse faults to date, either in the commercial AX device or the radiation-tolerant RTAX-S device. Actel will continue to life test these products and use the data collected to enhance the reliability of the product. Current testing for the RTAX-S using both the Qualification Burn-In (QBI) and the Enhanced Antifuse Qualification (EAQ) now totals over 1.93 million hours of life testing for a total of 2,191 units with no antifuse faults. This attests to the overall reliable nature of the antifuse and hence the product. This document describes the enhanced procedures and presents results of the additional qualification and lot acceptance tests performed in conformance with the new procedures.
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