TUSB9261: TUSB9261

vivek vishwanath

Prodigy 110 points

Part Number: TUSB9261

I am designing an USB to SATA adapter board .I am using TUSB9261 for my design.

USB use case : Device mode ,Self powered

I have noted that the VBUS voltage requirement as per the datasheet is 1.155V .

In the design guide they have used a 90.0K and 10K forming a voltage deivider .Is there any specific reason

In my design I had planned for a pullup on the VBUS ?

Kindly clarify at the earliest

over 7 years ago

0 Malik Barton57 over 7 years ago

TI__Guru 64326 points

Vivek,

The resistor divider is needed for the logic levels of the USB_Vbus.

0 vivek vishwanath over 7 years ago in reply to Malik Barton57

Prodigy 110 points

Hi
The VBus is a 5 source as per spec. However the datasheet mentions the maximum VBUS voltage as 1.15.
If we use the voltage divider formula it comes to 0.49V
Hence what is the Logic level high and low for this pin.

0 Malik Barton57 over 7 years ago in reply to vivek vishwanath

TI__Guru 64326 points

Vivek,

The input logic level are as listed below
VIH = ~0.475 V (Logic high)
VIL = ~0.3 V (Logic low)

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TUSB9261: TUSB9261