For semiconductor devices, determine the operating voltage (as a ratio of rated voltage) and junction temperature. Use the formula: [ T_j = T_ambient + (P_diss \times \theta_ja) ]
Let’s walk through a simplified example using Method II (Part Stress Prediction). telcordia sr-332 issue 3 pdf
Important legal note: Telcordia SR-332 is a copyrighted document. It is not freely available on public websites, despite many malware-ridden links claiming "free PDF download." Downloading from unofficial sources violates copyright law and risks infecting your network with viruses. It is not freely available on public websites,
For complex modules (like ASICs or power supplies), SR-332 Issue 3 allows the use of a "black box" failure rate. If you have observed data from a similar assembly, you can input that directly, rather than summing failure rates of every internal transistor. Only basic connectors are covered
Only basic connectors are covered. Cables and wiring are generally excluded, as they are considered structural elements. Their failures are handled separately.
If you have field data, use the Bayesian formulas in Section 6 of SR-332 Issue 3 to adjust your prediction.