TUSB2046B: Schematic Review

Venkatesh Keshava Reddy

Part Number: TUSB2046B
Other Parts Discussed in Thread: TPS2042

We are using TUSB2046B in self powered mode in our product. Please review the attached schematic.

Thanks and Regards,

0 Brian Zhou over 3 years ago

resistors on DP/DM should be 22 ohm, not 22k ogm

0 Venkatesh Keshava Reddy over 3 years ago in reply to Brian Zhou

Thank you very much. I have to be careful when I do copy-paste in CAD.

Regards,

Venkatesh

0 JMMN over 3 years ago in reply to Venkatesh Keshava Reddy

Hi Venkatesh,

The outputs of TPS2042 OCz likely require external pullups, please check.

Per USB spec, the upstream DP line should only be pulled high when an upstream port is connected.

Regards,

JMMN

0 Venkatesh Keshava Reddy over 3 years ago in reply to JMMN

Hi JMMN,

Thank you very much for pointing me OCz mistake. I have revised the schematic and attached here.

The upstream port will always be connected. I suppose the pull-up on upstream DP is good?

Thanks again,

Venkatesh

0 Brian Zhou over 3 years ago in reply to Venkatesh Keshava Reddy

yes, it should be fine

0 Venkatesh Keshava Reddy over 3 years ago in reply to Brian Zhou

Brian Zhou said:

yes, it should be fine

Thank you very much.

Venkatesh

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