STM32G431CBT6 - Arm Cortex-M4 Microcontroller

This page's STEP is a model generated with Open CASCADE from the datasheet, not the manufacturer's model, and it shows. The leads are not gull wings: they are flat strips or square posts, and the body has no draft or pin-1 dimple. Placed on a board, the part looks fake.

The manufacturer's model

• Vendor: STMicroelectronics
• Where: https://www.st.com/en/microcontrollers-microprocessors/stm32g431cb.html (CAD Resources tab)
• Route: ST hosts no STEP. The CAD Resources tab offers only two supplier widgets: 'Start your design with UltraLibrarian' (https://vendor.ultralibrarian.com/stmicro/embedded?rpn=STM32G431CBT6) and 'Start your design with SamacSys' (https://st.componentsearchengine.com/entry_u_newDesign.php?mna=STMicroelectronics&mpn=STM32G431CBT6&pna=st&vrq=multi&fmt=zip, partID 2207458). Both are third parties; both sets of terms say the content is owned by the third party (EMA / Supplyframe), so it is not clearly ST's own model.
• Download: none available

Licences:

• Ultra Librarian (EMA Design Automation): not allowed. https://vendor.ultralibrarian.com/TI/embedded/?gpn=OPA2365&package=D&pin=8 (Terms And Conditions modal, #modal-container-license); identical text on the /adi/ and /stmicro/ embeds

  Usage. ... You may incorporate the CONTENT that you are authorized to access into your products or designs which may be distributed without restriction, including for commercial, educational, and open-source purposes. You may not use CONTENT for publishing or creating a library or libraries for sale or distribution for commercial purposes or enabling third parties to do the same. | Copyright. The CONTENT is owned by EMA ... You agree to take all reasonable steps and to exercise due diligence to protect the CONTENT and the accompanying materials from unauthorized reproduction, publication, or d

• SamacSys / Component Search Engine (Supplyframe): not allowed. https://www.supplyframe.com/company/terms/ (linked as 'Terms of Service' from componentsearchengine.com; SamacSys = Supplyframe)

  4.3 License to Service Content. ... (a) you may access and use the Service Content solely for informational and internal purposes, in accordance with these Terms; (b) you may not modify or alter the Service Content; (c) you may not distribute or sell, rent, lease, license or otherwise make the Service Content available to others

So the manufacturer's model can't replace the page's STEP: it is not published, or only through a third party whose terms forbid redistribution.

Offered: a drawn model, checked against the datasheet

Attached is a drawn model with the part number laser-etched as a flat, toggleable Adom.LaserEtch layer: along the pin rows, upright, pin 1 lower left (adom-aiflow-etch check PASS).

• Base: KiCad's official 3D library model Package_QFP.3dshapes/LQFP-48_7x7mm_P0.5mm.step, made by KiCad's package generator. Real gull-wing leads, drafted body, pin-1 dimple.
• Licence: CC BY-SA 4.0 with the KiCad libraries' design exception (https://www.kicad.org/libraries/license/). It can be redistributed with attribution to the KiCad library team.
• Why not drawn on the service: the shared step2glb service has no permitted body-building verb (/create-chip and /bake are chipsmith; adom/adom-step2glb#27).
• Checked against: STM32G431x6 STM32G431x8 STM32G431xB datasheet (Rev 6 (October 2021), p.170 Figure 49 LQFP48 outline; p.171 Table 92 LQFP48 mechanical data). Every face was measured with the service's /step-meta.
• The proof: dims-drawn.md (datasheet min/max against the model) and overlay.png (every face of the model at true scale, top and side, inside the datasheet's limits). The vendor drawings are not to scale, so the limits are drawn instead.
• Every measured dimension is inside the datasheet's limits.

Suggested: replace the page's STEP with the attached etched model, keep its provenance (attached as provenance.json), and credit KiCad's library.

STM32G431CBT6-etched.step

dims-drawn.md

provenance.json