HD3SS3220: Design review

Hi JH,

Looking at your schematic, I see you flipped the TX and RX lines on the connector side of the 3220. You need to have the TX pins of the MUX connect to the TX pins on your connector.

Your VDD5 and OUT3 pins need to be connected to a 5V power rail. These cannot be connected to the USB VBUS because the VBUS may not always be present.

This is also the case for your CURRENT_MODE pin.

You can use the schematic in the datasheet as a reference for how this would look

Best,

Shane

Hi Mr. Kim,

Your SS lines look correct. I cannot see the 5V line but if you changed that then the schematic should be good.

Best,

Shane