XHSEM

Chip End-of-Life Notices: Planning Last-Time Buys and Alternative Validation

XHSEM · Procurement Guide · 2026-10-24

Buying more immediately after an end-of-life notice can create excess inventory. Waiting only for an alternative can leave a project past the last-order deadline. Industrial, automotive-electronics and IoT teams can instead start notice verification, demand planning and engineering evaluation together.

1. Verify whether the notice concerns a change or discontinuance

A product change may involve a manufacturing site, material, package or process without ending production. Verify the notice number, revision, publication date and affected complete orderable numbers through the manufacturer. A chat screenshot or a distributor's summary is not enough.

TI's official guidance distinguishes change information from discontinuance information. A discontinuance notice also involves ordering and delivery deadlines. Establish the notice type before deciding to build inventory.

2. Record last-order and last-delivery dates separately

The final date for accepting orders and the final delivery date are different milestones. Use the latest effective notice for the exact device and the confirmed order terms. Do not borrow dates from another part.

Maintain a register of full part numbers, affected projects, notice references, order deadlines, delivery deadlines, internal approval dates and owners. Allow time for quotation, sample evaluation and contract confirmation before the external deadline.

3. Calculate the actual purchasing gap

Planned purchase = production demand + reasonable service reserve + approved loss and safety allowance − usable inventory − confirmed deliverable orders.

This is a planning framework, not a manufacturer-prescribed formula. Quarantined stock, material awaiting inspection and inventory allocated elsewhere are not automatically usable. Orders without confirmed delivery are not reliable coverage. When forecasts are uncertain, compare conservative, baseline and high-demand scenarios with operations, engineering and finance.

4. Run alternative validation alongside last-time purchasing

A suggested replacement is not necessarily a drop-in part. Engineering should check package dimensions, pin definitions, electrical characteristics, start-up behavior, operating temperature and software dependencies, followed by prototype and application testing.

Automotive-electronics projects may also require customer acceptance and formal change approval. Procurement can coordinate samples and documents but should not promise full compatibility. Update the BOM only after validation, approval and switching lots are defined.

5. Agree traceability and order conditions

Compare source, packaging, lot information, available traceability and acceptance requirements alongside price. Label photos are supporting information, not standalone proof of origin.

Confirm cancellation conditions, quantity changes, staged delivery and exception handling. Treat unverified stock, pricing and delivery as pending rather than entering verbal estimates into a committed production plan.

Procurement takeaway

A workable plan includes the effective notice, exact part, demand gap, purchasing milestones, alternative-validation owner and outstanding issues. Send the full part number, quantity, target delivery and manufacturer notice reference with your enquiry. Availability remains subject to item-by-item confirmation.