During SEL characterization, the device was heated using forced hot air, maintaining the IC temperature at 125°C. The temperature was monitored by means of a K-type thermocouple attached as close as possible to the IC. The species used for the SEL testing was a silver (⁴⁷Ag) ion with an angle-of-incidence of 0° for an LET_EFF = 48.47MeV-cm²/mg. The kinetic energy in the vacuum for this ion is 1.634GeV (15MeV/amu line). A flux of approximately 10⁵ions/cm²-s and a fluence of approximately 10⁷ ions were used. The supply voltage is supplied externally on board at recommended maximum voltage setting of 5.5V. Run duration to achieve this fluence was approximately less than 2 minutes. Two devices were tested where one device was biased in an output high condition and the other device was biased in an output low condition. Each device had three runs.

No SEL events were observed, indicating that the TLV1H103-SEP is SEL-immune at LET_EFF = 43MeV-cm²/mg and T = 125°C. Using the MFTF method described in Section 9 and combining (or summing) the fluences of the three runs @ 125°C (3 × 10⁷), the upper-bound cross-section (using a 95% confidence level) is calculated as:

σSEL ≤ 1.23 × 10^–7 cm² for LET_EFF = 43MeV-cm²/mg and T = 125°C.

Figure 6-1 Run #8: DUT2 Supply Current vs. Time

Figure 6-2 Run #9: DUT2 Supply Current vs. Time

Figure 6-3 Run #10: DUT2 Supply Current vs. Time

Figure 6-4 Run #11: DUT3 Supply Current vs. Time

Figure 6-5 Run #12: DUT3 Supply Current vs. Time

Figure 6-6 Run #13: DUT3 Supply Current vs. Time