SCLK052 February 2024 SN54SC6T06-SEP , SN54SC6T07-SEP , SN54SC6T14-SEP , SN54SC6T17-SEP
During SEL characterization, the device was heated using forced hot air, maintaining device temperature at 125°C. A FLIR (FLIR ONE Pro LT) thermal camera was used to validate die temperature to make sure that the device was accurately heated (see Figure 3-5). The species used for SEL testing was a Xenon (129Xe) ion at a linac energy of 25MeV / u with an angle-of-incidence of 0° for an LETEFF of 43MeV-cm2 / mg. A fluence of approximately 1 × 107 ions / cm2 were used for the runs.
The three devices were powered up and exposed to the heavy-ions using the maximum recommended supply voltage of 5.5V using a National Instruments PXI Chassis PXIe-1085. The run duration to achieve this fluence was approximately two minutes. As listed in Table 5-1, no SEL events were observed during the nine runs, indicating that the SN54SC6T07-SEP is SEL-free. Figure 5-1, Figure 5-2, and Figure 5-3 show the plot of current versus time for run numbers one, four, and seven, respectively.
Run Number | Unit Number | Distance (mm) | Temperature (°C) | Ion | Angle | FLUX (ions × cm2 / mg) | Fluence (number of ions) | LETEFF (MeV × cm2/ mg) | Did a SEL event occur? |
---|---|---|---|---|---|---|---|---|---|
1 | 1 | 70 | 121 | Xe | 0° | 1.00E+05 | 1.00E+07 | 43 | No |
2 | 1 | 70 | 121 | Xe | 0° | 1.00E+05 | 1.00E+07 | 43 | No |
3 | 1 | 70 | 121 | Xe | 0° | 1.00E+05 | 1.00E+07 | 43 | No |
4 | 2 | 70 | 122 | Xe | 0° | 1.00E+05 | 1.00E+07 | 43 | No |
5 | 2 | 70 | 122 | Xe | 0° | 1.00E+05 | 1.00E+07 | 43 | No |
6 | 2 | 70 | 122 | Xe | 0° | 1.00E+05 | 1.00E+07 | 43 | No |
7 | 3 | 70 | 123 | Xe | 0° | 1.00E+05 | 1.00E+07 | 43 | No |
8 | 3 | 70 | 123 | Xe | 0° | 1.00E+05 | 1.00E+07 | 43 | No |
9 | 3 | 70 | 123 | Xe | 0° | 1.00E+05 | 1.00E+07 | 43 | No |
No SEL events were observed, indicating that the SN54SC6T07-SEP is SEL-immune at LETEFF = 43MeV-cm2 / mg and T = 125°C. Using the MFTF method shown in Single-Event Effects (SEE) Confidence Interval Calculations, the upper-bound cross-section (using a 95% confidence level) is calculated as: