Ipc-7351c Pdf: [2021]
The shift from revision B to C marks a move toward mathematical scaling rather than fixed tiers.
You want the IPC-7351C PDF to copy a footprint. ipc-7351c pdf
IPC-7351C (Generic Requirements for Surface Mount Design and Land Pattern Standard) represents a significant shift in how PCB component footprints are calculated and named The shift from revision B to C marks
When searching for an ipc-7351c pdf , look for the appendix tables that list every common component (Resistors, Caps, QFPs, BGAs) with their A/B/C dimensions. BGAs) with their A/B/C dimensions.