What semiconductor longevity promises actually tell buyers
Illustrative image: Brecht Corbeel on Unsplash
A promise that a semiconductor will remain available for ten or fifteen years sounds straightforward. In practice, longevity statements can refer to several different commitments.
Some manufacturers operate formal programmes that list named products and a minimum availability date. Others publish a planned production horizon, a portfolio policy or an indication based on typical product life. Those statements are not interchangeable.
The Semiconductor Longevity Benchmark 2026 examines that distinction and reviews 48 verified discontinuation events across 16 manufacturers. Within that sample, the median period from discontinuation notice to last-time buy was six months. The median period to final shipment was 12.2 months.
The authors are careful not to present those figures as an industry-wide average. The dataset is a public-data convenience cohort, so it may not represent every manufacturer, product family or market condition.
Even with that limitation, the analysis highlights why a single longevity number is insufficient. A component may sit within a formal programme but still be affected by package changes, wafer-fabrication transfers, material substitutions or changes to test and assembly. A nominally available part may also become difficult to obtain through authorised channels.
Product change notifications and end-of-life notices provide different information. A PCN may require qualification work while production continues. An end-of-life notice normally starts a finite period in which final orders and deliveries must be arranged.
Last-time-buy windows also need to be read alongside final-shipment dates. Ordering rights do not guarantee that all requested quantities will be accepted, and a long final-shipment window may reflect scheduled delivery of previously placed orders rather than continued open availability.
Longevity programmes remain useful, particularly for industrial, medical, transport, aerospace and infrastructure equipment with long service lives. Their value depends on the scope of the commitment, the named products and the process used when manufacturing conditions change.
A robust lifecycle record therefore combines the manufacturer’s programme, PCN and end-of-life monitoring, authorised-channel availability and the product’s own redesign constraints. The benchmark’s most useful contribution is not its median figure alone but its warning that availability claims need to be compared on like-for-like terms.
