LR P3A DualNCE
About the LR P3A DualNCE PCB
LR P3A DualNCE is an open source PCB design by Lightiam, published on GitHub. It is a 16-layer board measuring 230 × 150 mm, with 12 components from 3 distinct parts.
Other key parts include the TFLN-MZM-400G-C.
From the project
This folder ingests the owner-supplied LightRail AI Gen3 NCE Datasheet Rev 3.0 (LightRailGen3NCEDatasheetRev3.0.pdf, "Production Release for Seeed Studio Fusion PCBA") as the authoritative electrical design source — the thing the repo had been missing.
This folder ingests the owner-supplied LightRail AI Gen3 NCE Datasheet Rev 3.0 (LightRailGen3NCEDatasheetRev3.0.pdf, "Production Release for Seeed Studio Fusion PCBA") as the authoritative electrical design source — the thing the repo had been missing.
Start here: DATASHEETRECONCILIATIONANDBUILDPLAN.md.
The datasheet describes a real, buildable board (LR-P3A Rev 6.3) with complete real data — and it is a different board than the repo's TFLNAINODEX2. Critically, it places the NCE ASIC + HBM stacks inside the co-packaged (CPO) module on a silicon interposer, so the board-level NCE/HBM…
Main components on the LR P3A DualNCE
LR P3A DualNCE bill of materials (BOM)
12 components, 3 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | — | BGA-2500_40x40_P0.8mm_NCE | U101, U201 |
| 2 | TFLN-MZM-400G-C | U102, U202 | |
| 8 | — | BH1, BH2, BH3, BH4, BH5, BH6, BH7, BH8 |
LR P3A DualNCE design files
The KiCad project lives in the Lightiam/tapeout_07 repository on GitHub; these links point at the commit this page was built from.
LR P3A DualNCE: common questions
How big is the LR P3A DualNCE PCB?
The LR P3A DualNCE measures 230 × 150 mm, has 16 copper layers and is 1.6 mm thick.
How many components are on the LR P3A DualNCE?
12 components, from 3 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the LR P3A DualNCE design files?
From the Lightiam/tapeout_07 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the LR P3A DualNCE design in my own project?
The repository has no license, so all rights stay with Lightiam. Use it as a reference, and ask the author before reusing the design.
