When working on circuit design, I often run into the same frustrating problem:
the component I want to use has no library.
No symbol. No footprint. No reliable pin mapping.
At that point, the workflow is always the same. Open the datasheet, read package dimensions, trace the pin layout, build the symbol, build the footprint, then check everything again because one small mistake can affect the entire board.
It is necessary work, but it never feels like the work I should actually be spending my time on.
Library creation has a bad combination of properties:
- it is repetitive
- it takes time
- mistakes are expensive
- verification is still required even after the drawing work is done
That made me ask a simple question:
Can we automate the first pass of PCB library creation directly from a datasheet PDF?
If you think about what we do manually, the process is fairly structured. We read dimensions. We interpret package drawings. We understand pin assignments. Then we translate that information into geometry and mappings for EDA tools.
So I built a workflow that reads a PDF datasheet and generates a first draft of:
- a schematic symbol
- a PCB footprint
- the pin mapping between them
The result is not magic, and it is not fully automatic. Final verification is still necessary, especially for more complex packages.
But even with that constraint, the workflow changes a lot.
Instead of spending most of the time drawing from scratch, I can spend more of it checking whether the output is correct. In practice, that means library creation can go from tens of minutes to just a few minutes for the initial draft, with fewer manual input mistakes along the way.
That shift turned out to be the important part.
The hardest part of circuit design support work is not generating things. It is verifying that they are correct. Good tools do not remove engineering responsibility, but they can remove a lot of repetitive setup work before verification starts.
That is what I have been exploring with Librizer: taking a datasheet PDF and generating the first-pass symbol and footprint for Fusion.
It works best as a way to compress the manual setup phase, not as a replacement for engineering review.
I think there is still a lot of room to improve how component libraries are created, especially for parts that do not already exist in marketplace libraries or for libraries that engineers do not fully trust.
If you have run into this problem, you might find this useful:
Top comments (0)