TUSB212: Eye pattern fail

Hardy Xue

Part Number: TUSB212
Other Parts Discussed in Thread: TUSB216I,

Hi Team,

My customer found the eye pattern was fail. But the result of TypeC cable w/ flip and w/o flip are different. I am not sure why there are 2 result on same AD/DC boost setting. Could you provide any comments? Thank you.

TypeC cable no flip:

TypeC cable flip:

Best regards,

Hardy

over 2 years ago

0 Malik Barton57 over 2 years ago

TI__Guru 64326 points

Hi Hardy,

Are the USB2 pins on the USB-C receptacle shorted together? In the flip condition the eye is not boosted. I would recommend using TUSB216I for the best eye diagram.

0 Hardy Xue over 2 years ago in reply to Malik Barton57

TI__Expert 3590 points

Hi Malik,

Yes, customer shorted together USB2 pin on the USB-C receptacle. Why TUSB212 in the flip condition the eye is not boosted? I also don't see TUSB216I support flip condition in the datasheet. Could you kindly talk about it more detail? Thank you.

Best regards,

Hardy

0 Malik Barton57 over 2 years ago in reply to Hardy Xue

TI__Guru 64326 points

Hi Hardy,

There is not FLIP condition for TUSB216I since both sets of USB 2 pin are shorted at the connector. WE should ensure customer is following the correct test procedure listed in the datasheet even in the FLIP condition.

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TUSB212: Eye pattern fail