TUSB8020B-Q1: can i connect LED to SS_DN2?

Jakub Vanek

Tool/software:

Hello, I'm designing a PCB with TUSB8020BIPHPRQ1 and I would like to indicate activity on both upstream and downstream ports, is it possible to connect an LED to SS_DN2 (pin 22) for example?

Thank you in advance for your help,

Jakub

over 1 year ago

0 Brian Zhou over 1 year ago

TI__Guru**** 164001 points

Hi Jakub:

yes, you can .

After reset, FULLPWRMGMTz/ SMBA1/SS_UP ,PWRCTL_POL/SS_DN1, SMBUSz/SS_DN2 are indication for SS speed.

Best

Brian

0 Jakub Vanek over 1 year ago in reply to Brian Zhou

Prodigy 50 points

How much current can one pin provide?

0 Brian Zhou over 1 year ago in reply to Jakub Vanek

TI__Guru**** 164001 points

one pin can provide 225ua max.

Best

Brian

0 Jakub Vanek over 1 year ago in reply to Brian Zhou

Prodigy 50 points

Hey, Brian,

Thanks for the replies, Last question which is not related to the LEDs, when I use only a 2.0 USB, should the SS pair be left unconnected?

0 Brian Zhou over 1 year ago in reply to Jakub Vanek

TI__Guru**** 164001 points

yes, you can left SS signal unconnected if not used.

Best

Brian

Interface

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TUSB8020B-Q1: can i connect LED to SS_DN2?