TS3USB221E: Can I use VBUS as select input?

Shuhei Goto

Intellectual 2930 points

Part Number: TS3USB221E

Hi team,

Customer is considering to use VBUS (for preferred port) as S.

Is there any problem?

Especially concerned about the voltage rating and signal rise/fall time.

Best regards,,

Goto

10 months ago

+1 Ryan Kitto 10 months ago

TI__Mastermind 24025 points

Hi Goto-san,

I believe this should be a fine application, yes. The absolute max for the control pins is 7V, and we have no defined max in the recommended operating conditions, so I see no issue there. Using VBUS to control the S pin should not affect the signal rise/fall time going through the mux. Is the device being powered by pulling VBUS down to 3.3V, or is it being powered by an external 3.3V?

Thanks,

Ryan