SEU and latchup tolerant advanced CMOS technology

Selected microcircuits constructed in National Semiconductor's FACT (Fairchild advanced CMOS technology) were tested for heavy-ion-induced single event upset (SEU) and latchup. The devices showed no signs of heavy-ion-induced latchup for linear energy transfer (LET) values up to 120 MeV/(mg/cm/sup 2/). SEU LET thresholds varied within a rather narrow range of 40 to 60 MeV/(mg/cm/sup 2/). The test results suggest that FACT devices will exhibit higher tolerances to the cosmic ray environment than functionally similar microcircuits fabricated in HC/HCT (high-speed CMOS), ALS (advanced low-power Schottky), and LS (low-power Schottky) technologies. >