After receiving a product-change or discontinuation notice, verify the source, identify affected BOMs and coordinate purchasing, technical and quality actions. A screenshot or forwarded warning is a lead, not sufficient justification for speculative stock purchases or unapproved substitutions. This guide makes no claim about current shortages.
1. Locate the original notice
Record issuer, notice number, title, revision, publication date and retrieval channel, then check the manufacturer's official resource. PCN commonly denotes a product change notification, while discontinuation terminology and arrangements vary. Read the document rather than relying on the abbreviation.
TI's official information illustrates fields such as affected products, change details and relevant milestones.[1] It is an example, not a universal timeline or a common policy for every manufacturer.
2. Match complete part numbers
Compare affected-part attachments and applicable package, production or other scope against internal identifiers. A family-level notice does not automatically mean every suffix and inventory lot is affected in the same way.
Use separate states for confirmed affected, supported as unaffected and unresolved. Request clarification from an authorized source where the notice does not establish scope. Do not broaden it by assumption or dismiss a similar-looking identifier without checking.
3. Link each date to its action
Change effectiveness, sample availability, last order and last shipment are different milestones. Record each meaning and prerequisite rather than using one date as every purchasing deadline.[1]
Review inventory, inbound material, open orders and forecasts. Discontinuation does not mean all channels immediately have no stock, while existing inventory does not prove future demand is covered. Additional purchases require confirmed demand and defined financial and inventory responsibility, not urgency generated from the notice alone.
4. Coordinate technical, quality and planning review
The actual change may require review of materials, package, manufacturing process or another specific area. Appropriate personnel should assess design and verification impact. Manufacturer quality or qualification records can support the review but retain their own scope.[2]
Open a separate candidate and approval record for alternatives. A manufacturer's or supplier's suggested part is a lead, not automatic permission to avoid PCB changes or testing. Purchasing should not reduce notice handling to simply buying a new number.
5. Maintain a notice and action record
| Record | Information to retain | Owner and next action |
|---|---|---|
| Notice identity | Issuer, number, revision and original link | Purchasing/document owner verifies |
| Scope | Full numbers, internal mappings and conditions | Engineering identifies affected BOMs |
| Milestones | Meaning and prerequisites of each date | Planning compares production and delivery |
| Stock/orders | Quantities, revisions, locations and confirmation dates | Warehouse and purchasing reconcile |
| Technical impact | Differences, required verification and unknowns | Engineering and quality allocate tasks |
| Purchasing/alternatives | Stock rationale, candidates and approval states | Execute after project authorization |
| External communication | Customer requirements, responses and confirmations | One assigned communication owner |
6. Define closure and review triggers
Every action needs an owner, target date and completion evidence. Closing a notice means affected BOMs and required approvals are handled, or remaining risks have defined actions; it does not mean deleting the source.
Send MISUXIN the original notice and affected BOM, together with current stock information, demand and allowed changes. Verify supply, stocking and alternative arrangements separately rather than deriving real-time availability from a notice alone.
References
[1] Texas Instruments. Product change notification and discontinuation information. Notice content, affected products and notification process. Manufacturer-specific timelines are not generalized.
[2] Texas Instruments. General Quality Guidelines, SZZQ076Q. Rev. Q, 15 April 2025; sections 8, 19, 25–30: supply-source boundaries, nonconformance, traceability, packaging, date codes and labels. Describes TI practices, not every manufacturer or MISUXIN.
Related reading A10 · L10 · A02 (earlier)
Sources checked: 19 September 2026. Templates and conceptual relationships are editorial aids; confirm individual applications against manufacturer documents and project conditions.