Most engineers ignore PCNs until it's too late. A manufacturer's notice might mean nothing more than a new date code — or it could signal a fab move, process change, or the start of an EOL/discontinuance. Here's a quick framework I use after getting burned a few times.
1. Check the Change Category first
2. Track three dates
3. Check if requalification is needed
Fab, process, or material changes usually come with reliability data (JEDEC-style test results). Automotive and medical applications especially can't skip this — a "minor" package change can still trigger an internal re-qual process.
4. Don't assume you'll get notified
PCN delivery often depends on whether you're subscribed directly with the manufacturer, or whether your distributor is actively tracking it for you. If your supply chain has several tiers, it's worth checking the OEM's site directly rather than relying entirely on downstream alerts.
5. Discontinued doesn't mean unavailable
Even after a PDN, a last-time-buy order — or sourcing traceable, authorized-channel stock — can still bridge the gap. The real problem is discovering the issue after that window has already closed.
Curious how others here track PCNs/EOL notices, or if you've got a better system than checking manufacturer sites manually. Would love to hear what's worked (or blown up) for you.
1. Check the Change Category first
- Die/Wafer fab change
- Assembly/Package change
- Test site change
- Product discontinuance (PDN)
2. Track three dates
- Last Order Date
- Last Shipment Date
- Change Implementation Date
3. Check if requalification is needed
Fab, process, or material changes usually come with reliability data (JEDEC-style test results). Automotive and medical applications especially can't skip this — a "minor" package change can still trigger an internal re-qual process.
4. Don't assume you'll get notified
PCN delivery often depends on whether you're subscribed directly with the manufacturer, or whether your distributor is actively tracking it for you. If your supply chain has several tiers, it's worth checking the OEM's site directly rather than relying entirely on downstream alerts.
5. Discontinued doesn't mean unavailable
Even after a PDN, a last-time-buy order — or sourcing traceable, authorized-channel stock — can still bridge the gap. The real problem is discovering the issue after that window has already closed.
Curious how others here track PCNs/EOL notices, or if you've got a better system than checking manufacturer sites manually. Would love to hear what's worked (or blown up) for you.
