What is the correct recommended pad size for the STM32 in the TFBGA240+25? The Table 135 of the datasheet seems incorrect.

[CGand.1]

With a ball size of 0.4mm I would expect a pad size of 0.36mm , but 0.225 mm is in the table.

[Imen.D]

Hello @CGand.1​ ,

Which H7 Datasheet ? Please point to the latest Datasheet.

Best Regards,

Imen

[CGand.1]

Table 135 in https://www.st.com/resource/en/datasheet/stm32h745xi.pdf

[Imen.D]

 Hi @CGand,

You are right, the PCB recommended design rules for TFBGA240+25 (0.8mm) pitch is not correct.

The values should be:

• Pitch : 0.8
• Dpad : 0.400 mm
• DSM : 0.500 mm
• Stencil opening : 0.400mm

I raised this internally for correction in the next STM32H7 datasheets.

Best Regards,

Imen