# Product Lifecycle & PCN

Lifecycle states (GA, NRND, EOL), change notifications, and our commitment to backward compatibility and seamless migrations.

## 1\. Lifecycle states

- **GA** (General Availability): actively sold and supported.
- **NRND** (Not Recommended for New Designs): available for existing programs; not intended for new designs.
- **EOL** (End of Life): sales end date and last‑time‑buy/last‑time‑ship timelines communicated; support transitions to sustaining.

## 2\. Backward compatibility & migrations

- We aim to maintain backward compatibility across releases and provide seamless migrations to updated chipsets/modules.
- Where a change affects pinout, RF characteristics, or firmware, we provide migration notes and sample reference designs.
- Drop‑in replacements: for most EOL modules, a mechanically and electrically compatible successor is offered whenever feasible.

## 3\. Product Change Notice (PCN)

- Issued for material changes (e.g., silicon revision, RF front‑end, BOM change, mechanical/thermal envelope).
- Includes description, rationale, risk/impact, recommended actions, and effective dates.
- Target notice windows depend on change type and supply constraints; we provide commercially reasonable advance notice.

## 4\. Product Discontinuance Notice (PDN)

- Communicates last‑time‑buy (LTB) and last‑time‑ship (LTS) dates, along with successor recommendations.
- Includes migration guidance and any required certification updates for successor SKUs.
- After LTS, we cease stocking inventory; RMA/service support follows warranty terms for shipped units.

## 5\. Supply & allocation

During supply constraints, allocation policies may apply. We’ll coordinate with customers to prioritize critical programs and ensure continuity while successor products ramp.

## 6\. Certifications & regulatory continuity

- Where practical, successors retain regulatory equivalence to enable drop‑in replacement; otherwise, guidance is provided to update markings or documentation.

## 7\. Communication

PCN/PDN communications are delivered to customer contacts on file. To ensure you receive notices, keep your program contacts current or reach out.