SBOK089 February 2025 SN54SC8T373-SEP , SN54SC8T573-SEP
Event rates were calculated for LEO (ISS) and GEO environments by combining CREME96 orbital integral flux estimations and simplified SEE cross-sections according to methods shown in Heavy Ion Orbital Environment Single-Event Effects Estimations. A minimum shielding configuration of 100mils (2.54mm) of aluminum, and worst-week solar activity is assumed. (This is similar to a 99% upper bound for the environment.) Using the 95% upper-bounds for the SEL and the SET, the event rate calculations for the SEL and the SET are listed inTable 5-3 and Table 5-4, respectively. Note that this number is for reference since no SEL or SET events were observed.
| Orbit Type | Onset LETEFF (MeV-cm2 / mg) | CREME96 Integral FLUX ( per day / cm2) | σSAT (cm2) | Event Rate (per day) | Event Rate (FIT) | MTBE (Years) |
|---|---|---|---|---|---|---|
| LEO (ISS) | 50 | 3.80 × 10-4 | 4.10 × 10-8 | 1.56 × 10-11 | 6.48 × 10-4 | 1.76 × 108 |
| GEO | 1.23 × 10-3 | 5.04 × 10-11 | 2.10 × 10-3 | 5.43 × 107 |
| Orbit Type | Onset LETEFF (MeV-cm2 / mg) | CREME96 Integral FLUX ( per day / cm2) | σSAT (cm2) | Event Rate (per day) | Event Rate (FIT) | MTBE (Years) |
|---|---|---|---|---|---|---|
| LEO (ISS) | 50 | 3.80 × 10-4 | 4.10 × 10-8 | 1.56 × 10-11 | 6.48 × 10-4 | 1.76 × 108 |
| GEO | 1.23 × 10-3 | 5.04 × 10-11 | 2.10 × 10-3 | 5.43 × 107 |
MTBE is the mean-time-between-events in years at the given event rates. These rates clearly demonstrate the SEE robustness of the SN54SC8T573-SEP in two harshly conservative space environments. Customers using the SN54SC8T573-SEP must only use the above estimations as a rough guide and TI recommends performing event rate calculations based on specific mission orbital and shielding parameters to determine if the product satisfies the reliability requirements for the specific mission.