TUSB2077A: PWRON and OVRCUR when not used

Trenton Reed

Part Number: TUSB2077A

Hi Team,

Some of the ports on TUSB2077A will not be used (ports 6 and 7) and therefore the overcurrent pins are not used. How should PWRON and OVRCUR for the respective ports be connected if they aren't used (pins 32,33,36,37)?

Thank you,

over 2 years ago

0 Trenton Reed over 2 years ago

TI__Expert 3010 points

For added clarity the ports 6 and 7 are connected to another TUSB2077A for daisy chain implementation.

+1 David (ASIC) Liu over 2 years ago in reply to Trenton Reed

TI__Guru**** 177061 points

Hi,

The OVRCUR can be tied to a pull-up 1.5k resistor. The PWRON can be left unconnected.

Thanks

David

0 Trenton Reed over 2 years ago in reply to David (ASIC) Liu

TI__Expert 3010 points

Thanks, David. The PWRON pin is either left unconnected or used to control a small PFET to turn on 3.3V power to dedicated low power device on board. Is there any issue with this use?

0 David (ASIC) Liu over 2 years ago in reply to Trenton Reed

TI__Guru**** 177061 points

Hi,

As long as the electrical spec is met, then I do not see this as an issue.

Thanks

David

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TUSB2077A: PWRON and OVRCUR when not used