As there are new components getting added to the mouser or digikey, is it possible to calculate the failure rate based on some pre known facts and values? some vendors don't reply for weeks and I can't wait that long for MTBF value.
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4\$\begingroup\$ MIL-HDBK-217F has typical MTBF for passives and types of IC's \$\endgroup\$– user16222Commented Jun 11, 2020 at 11:13
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1\$\begingroup\$ I second that but only if the supplier has a decent reputation in the industry. \$\endgroup\$– Andy akaCommented Jun 11, 2020 at 11:39
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2 Answers
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Lacking anything more specific from the manufacturer, the best you can do in my opinion is to use MIL-217F. You need to know something about the part you're interested in - for example is it bipolar, CMOS, SiGe; how many devices (gates); package type (plastic, ceramic, hybrid/MCM) number of pins/pads; the environment (lab, aircraft, space) and temperature range; duty cycle (some components are stressed more a turn-on), etc.
With that information in hand, you should be able get a very rough estimate of a part's expected lifetime. Emphasis here is on the phrase "very rough". If you're designing this into a high rel product, then the manufacturer needs to step up or you need to find a different manufacturer to work with - one that is used to dealing with the needs of customers designing hi-rel products.
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It would be difficult to estimate this, one can either measure MTBF or estimate it. Estimating it requires knowing most of the design. This creates a real problem for the designer because to measure parts you would have to buy batches of them and measure the failure rate. Estimating would require some knowledge about the package and design, which would be hard and expensive to reverse engineer. Best to go with parts that have the rating listed.
answered May 21 at 18:02