TUSB2046I: RC circuit for RESET

Allen Fernandez

Part Number: TUSB2046I

Tool/software:

I understand that a RC circuit can be used with the RESET pin for the TUSB2046I, but I don't see info on this anywhere in the latest datasheet. Here is a reference to a past inquiry on this same subject :

[TUSB2046I] Query on reset pin - Interface forum - Interface - TI E2E support forums

Please recommend values for R & C for the RESET pin along with any other pertinent information.

Thank you.

over 1 year ago

0 Brian Zhou over 1 year ago

TI__Guru**** 154260 points

Hi Allen

You need to make sure RESET must keep low at least 1 ms after 3.3-V VCC reaches its 90%. Normally a 1uf Cap is connected to RESET pin to ground.

Best

Brian

0 Allen Fernandez over 1 year ago in reply to Brian Zhou

Prodigy 60 points

What else should be connected to the RESET pin besides a 1uF capacitor ?

0 Brian Zhou over 1 year ago in reply to Allen Fernandez

TI__Guru**** 154260 points

For Reset, you can do either with passive reset by adding external Cap or active reset using external GPIO signal to control Reset pin.

Best

Brian

0 Allen Fernandez over 1 year ago in reply to Brian Zhou

Prodigy 60 points

Does the RESET pin have an internal pullup ? If so, what is the pullup resistor value ?

0 Brian Zhou over 1 year ago in reply to Allen Fernandez

TI__Guru**** 154260 points

There is no single pullup resistor inside RESET, it's just have overall pullup for a POR (power on reset ) circuit.

Best

Brian