TUSB551 / about suspend condition

Sho Ogane

Other Parts Discussed in Thread: TUSB551

Hi all.

My customer will do USB3.0 compliance test to obtain the USB logo as USB peripheral device.
The content of test is the following,
・ the average suspend current of the device is equal to or less than 2.5mA.

I think that the suspend condition of TUSB551 is "Link in U3"(datasheet P5 Icc-U2U3).
The value is 12.20mA(typ), is this value correct?

I think this device can't pass the compliance test.
Is it recommended that we use the USB redriver in peripheral device.

Best Regards,
Sho Ogane

over 9 years ago

0 Diego Cortes over 9 years ago

TI__Mastermind 36085 points

Hello Sho,

I am reviewing your question and I will reply soon,
Regards,
Diego.

0 Sho Ogane over 9 years ago in reply to Diego Cortes

Genius 5575 points

Hi Diego san.

Thank you for the reply.
I am waiting your answer.

Best Regards,
Sho Ogane

0 Diego Cortes over 9 years ago in reply to Sho Ogane

TI__Mastermind 36085 points

Hello Sho-san,

I've checked the device's spec and the number is right, our device draws an average of 12.20mA in U2/U3, however this current consumption is @ 1.5V and it is not necessary to draw this power from VBUS.

Regards,
Diego.

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TUSB551 / about suspend condition