cd4520b: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding)
cd4520b: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero
cd4520b: laser-etched CAD + chip hero (factory 2.0.0 backfill)
cd4520b: hero re-rendered with iso-front (part number upright)
cd4520b: laser-etched CAD + chip hero (factory 2.0.0 backfill)
cd4520b: stamp component.logic (CD4520) from component-ocean
cd4520b: backfill missing artifacts (etch, variants)
add validated EAGLE .lbr (Fusion library)
CD4520B: validated Fusion/EAGLE library + adom-lbr hub, generated from this page's KiCad sources
add .step (Fusion 3D source)
cross-highlight symbol + footprint viewers
component page: CAD + datasheet-first provenance
Initial commit: component/cd4520b