SNAA391 june 2023 LMK6C , LMK6D , LMK6H , LMK6P
3 Using the Online Estimator to Calculate MTBF and FIT
TI provides an online calculator, the MTBF/FIT estimator tool, for calculating MTBF and FIT. Figure 3-1 shows a snapshot of the online calculator. This section describes how to use the estimator tool using the LMK6C as an example.
Enter the TI part number in the input provided under the MTBF and FIT estimator, shown Figure 3-1. Then click on Search button.
Figure 3-1 Snapshot of the Online MTBF
and FIT Estimator ToolSelect the specific part number under the LMK6x list provided. Clicking on the individual part generates MTBF and FIT information, as shown Figure 3-2.
Figure 3-2 Generated MTBF and FIT Information for the LMK6C Above the information shown in Figure 3-2 is a button for the de-rating tool. Use this de-rating tool to find the FIT calculation for different usages and operating temperatures other than the calculations for 55 °C calculated in the previous section. Enter the BAW oscillator FIT rate of 1.5 at 55 °C operation and use the scrolling option to increase/decrease the application temperature to determine the MTBF numbers at different operating temperatures.
Figure 3-3 Snapshot of De-rating Tool Using 55 °C Use CaseAs Figure 3-3 shows, for 35 °C operating temperature use case, the FIT value is 0.3.