The pad in center of TCA9509 QFN package

Terry Wu83110

Prodigy 620 points

Other Parts Discussed in Thread: TCA9509

all,

would you please help to check whether the pad in the center of QNF package TCA9509 need to connect to GND or just NC?

thanks

over 10 years ago

0 Emrys Maier over 10 years ago

TI__Guru* 97526 points

Moving to I2C apps forum for support.

0 Jonathan Valdez over 10 years ago

TI__Genius 16565 points

Hello Terry,

The PAD should be connected to ground. Typically this is because the ground plane is a large solid piece of copper, providing the largest area for thermal dissipation. You should provide a copper pad for the thermal pad, and then have several VIAs to the ground plan on your board if possible.