VFQFPN pad connection

[Mikk Leini]

Posted on November 23, 2011 at 22:04

Hello,

Unfortunately i cannot find information about STM32 QFN middle exposed pad connection anywhere. I'm interested especially in STM32F103T8. Tester didn't show any conductance from pad to Vss or Vdd pins. To have a simpler PCB, can i connect the pad to Vdd safely?

BR,

M

[hbliek2]

Posted on November 24, 2011 at 12:11

Don't know a bout this specific part, but I would choose to remove the PCB pad altogether and use the space for tracks, rather than keep the pad and connecting to VDD. After all, it has no significant thermal purpose for this mcu.

[Tesla DeLorean]

Posted on November 24, 2011 at 15:57

Well it will certainly be a complete bastard to remove the part if you have to desolder.

The problem with two-layer boards is that they so often have totally inadequate power routing, and are awfully noisy.