HD3SS3212: design check

Kai Lai

Part Number: HD3SS3212
Other Parts Discussed in Thread: TUSB542

Hi Team,

Customer have a design requirement as below,

The distance from PCH to TypeC connector is about 7inch.

If customer would like to use our HD3SS3212, work with USB3 3.1 Gen1(5G) or Gen2(10G), do you think it will have signal quality issue? Need to change to use redriver MUX such like TUSB542/1042 for margin safety?

Thanks!

Kai

over 3 years ago

+1 David (ASIC) Liu over 3 years ago

TI__Guru**** 177776 points

Kai

The HD3SS3212 is just a passive MUX. If their design will exceed 6.5dB loss budget for Gen 1 or 8.5dB loss budget for Gen 2 on the host side, then I will recommend the TUSB1042.

Thanks

David

0 Kai Lai over 3 years ago in reply to David (ASIC) Liu

TI__Expert 8996 points

Hi David,

Got it, thank you for your reply!

0 Eddie Yeh over 3 years ago in reply to David (ASIC) Liu

TI__Prodigy 360 points

Hi David

I am curious how do you define the 6.5dB for Gen1 and 8.5dB for Gen2?

Where can I find the related document?

Thank you

+1 David (ASIC) Liu over 3 years ago in reply to Eddie Yeh

TI__Guru**** 177776 points

Hi,

Please see this link for the USB insertion loss budget, Figurer 8 is for 5G and Figure 9 is for 10G.

https://www.usb.org/sites/default/files/USB_3.1_Loss_Budget_Rev_1.0_-_2015-03-02.pdf.

Thanks

David

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HD3SS3212: design check