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Chip vendors use different lifecycle labels, notice periods and exceptions, so an “end-of-life” announcement does not mean the same thing across suppliers—or even across every part from one supplier. Check the exact part number and its notice dates before treating a chip as discontinued or assuming a replacement will fit.
Have chip vendors recently tightened their end-of-life policies?
That is not established by the available vendor policies and notices. Texas Instruments, Microchip Technology and NXP Semiconductors publish lifecycle categories and discontinuance processes, but their definitions and timelines differ. The available information does not provide a comparable history of policy changes across vendors that would demonstrate an industry-wide move toward stricter rules.
There are, however, documented cases where upstream production constraints have led to discontinuances. NXP’s notices illustrate why a specific end-of-life event can happen without proving a broad policy trend.
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What do NRND, EOL and obsolete mean?
Read the vendor’s own definition rather than treating lifecycle labels as interchangeable. NXP distinguishes NRND from a decision to discontinue: its lifecycle page says, “No discontinuance decision has been made” when a product is marked NRND. NXP uses EOL for a product whose discontinuance is underway, with orders possible until the last-time-buy date; NLM means orders are no longer accepted and manufacturing has ended. See NXP’s lifecycle definitions.
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TI’s categories include Preview, Active, NRND, Last Time Buy and Obsolete. Because category names and meanings are vendor-specific, confirm what a status means on the relevant supplier’s lifecycle page and in the part’s notice. TI’s product life cycle page describes its categories and lifecycle approach.
How do the vendors’ stated timelines compare?
These figures describe particular vendor policies or notices, not an industry standard. A notice tied to a specific part can set different dates or conditions.
| Vendor | Published policy or example | Qualification |
|---|---|---|
| Texas Instruments | Standard discontinuance schedule: 12 months to place a last order, followed by up to six additional months for final delivery. | TI says rare cases may use an accelerated schedule. Its product lifecycles are typically 10 to 15 years and often longer; that is a typical description, not a promise for every part. TI FAQs; TI product change notification; TI product life cycle. |
| Microchip Technology | EOL notices state last-time-buy (LTB) and last-time-ship (LTS) dates, or the earliest possible dates. | Dates depend on availability of critical components or inventory; the company says EOL occurrences are rare. Microchip EOL policy. |
| NXP Semiconductors | One 2025 Fab5-related notice gives six months for last orders on multiple-source products and nine months for sole-source or customer-specific products. | The notice includes exceptions for limited-availability or non-manufacturable products. Do not apply this notice’s schedule to other NXP parts. NXP notice 202509010DNU01. |
What can trigger a chip discontinuance?
End-of-life notices can reflect constraints in the supply chain or manufacturing process, not just a vendor’s decision about demand. Two NXP notices provide concrete examples:
- Legacy technology and unsupported production tools: In its 2026 notice, NXP said selected products relied on legacy technology and aging tools or processes that suppliers no longer supported, making continued production unsustainable. The notice suggests other NXP product families for some affected categories. NXP notice 202601026DN.
- A planned foundry closure: In a separate notice, NXP said TSMC planned to cease production at Fab5, a 150 mm legacy-technology site in Hsinchu, by the end of 2027. NXP tied the closure to discontinuance of affected products and directs customers to part-specific dates and replacement details. NXP notice 202509010DNU01.
These examples establish reasons for those notices; they do not show that all chip vendors are tightening their policies.
What does a vendor’s lifecycle promise cover?
TI says its product lifecycles are typically 10 to 15 years and often longer, but the page does not promise that duration for every device. It also lists conditions under which a standard product is not eligible for obsolescence: sales within the previous five years, or seven years for automotive or high-reliability products; production for less than ten years if the product can still be manufactured; or current customer demand. Those are TI’s stated criteria, not universal industry rules. TI’s product life cycle page.
Microchip says it generally notifies customers about products with business activity during the preceding three years. For automotive, military and space products, longer periods may apply according to relevant standards or contracts. Microchip also reports approximately 0.2% annual EOL rates for calendar years 2022 and 2023; that is the company’s figure, not an independently established industry comparison. Microchip EOL policy; Microchip product longevity statement.
How can you check an EOL notice for your part?
- Find the exact part number. Search the vendor’s lifecycle or product-change-notification resources and open the notice that lists the affected part. A family name or similar model number is not enough to establish that your exact device is covered.
- Check the notice revision and dates. Record the last-time-buy date and last-time-ship date, or the earliest possible dates if the notice uses that wording. Check whether orders or delivery are limited by inventory or availability.
- Confirm how notices reach your organization. Microchip publishes EOL notices on its PCN page and emails registered users. It says notification coverage generally depends on business activity in the preceding three years, with possible longer periods for certain regulated or contract-covered products. Microchip Product Change Notifications.
- Assess the replacement before ordering. Microchip says it endeavors to offer drop-in replacements, may offer functionally equivalent parts with minor variations, and may have no replacement. Compare the affected-parts list and technical details, then validate the candidate against your design and qualification requirements. Ask the vendor or sales office about alternatives when needed. Microchip EOL policy.
- Plan around your actual redesign and supply needs. Decide whether the stated order and delivery windows give you enough time for remaining production, inventory planning, redesign and qualification. The notice’s dates and constraints—not a general vendor timeline—are the relevant basis for that decision.
How should you judge claims that policies are getting tougher?
Compare dated policy revisions or notices, not isolated announcements. For each vendor and affected part, compare the lifecycle-status definitions, time from notification to last order, time from last order to final delivery, exceptions, notification coverage and replacement specificity. A foundry closure or unsupported process can explain a particular discontinuance, but it is not by itself evidence that a vendor changed its general policy.
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