TUSB522P: Review Request for TUSB522P Redriver schematic and Layout suggestion point

Bhadresh Patel

Part Number: TUSB522P
Other Parts Discussed in Thread: TUSB542

Hi Team,

Please find the attached PDF for review.

The TUSB522P redriver schematic is on Page 9. The redriver input is connected to the FPGA side (Page 6), and the redriver output is connected to the USB Type-C connector (Page 7).

Could you please review the schematic and let me know if you identify any issues or recommended changes? Additionally, I would appreciate any layout suggestions or best-practice recommendations for signal integrity and routing.

Thank you for your support.

Jedi_D9_USB23_board.pdf

Thanks & Regards,

Bhadresh Patel

4 months ago

0 Vishesh Pithadiya 4 months ago

TI__Guru 64846 points

Hi,

Im looking into this, and I will have a response by COB today.

0 Vishesh Pithadiya 4 months ago in reply to Vishesh Pithadiya

TI__Guru 64846 points

You can use the TUSB522p EVM as a reference layout and schematic.

Here is the link for the EVM: https://www.ti.com/tool/TUSB522PEVM

I will need some more time for a full layout review. I will have the review ready in 1 business day.

0 Vishesh Pithadiya 4 months ago in reply to Vishesh Pithadiya

TI__Guru 64846 points

Hi,

The schematic shared only has page 7. Can you share the full schematic?

0 Bhadresh Patel 4 months ago in reply to Vishesh Pithadiya

Prodigy 20 points

Hi Vishesh,

Find attached latest schematic PDF file.

Jedi-d9_schematic.pdf

0 Vishesh Pithadiya 4 months ago in reply to Bhadresh Patel

TI__Guru 64846 points

Hi,

Here is the schematic review:
TUSB522p_Schematic_Review_LatticeSemi_JediD9(6_10_2026).pdf

0 Bhadresh Patel 3 months ago in reply to Vishesh Pithadiya

Prodigy 20 points

I have implemented your input in schematic.

Yes U1A is a FPGA.

0 Bhadresh Patel 3 months ago in reply to Bhadresh Patel

Prodigy 20 points

Yes U1A is FPGA and P3 is Type C connector.

so please review type c connector connection and let me know require correction.

0 Vishesh Pithadiya 3 months ago in reply to Bhadresh Patel

TI__Guru 64846 points

Hi,

Understood.

The USB Type-C implementation has some issues:

1) SSTX/ SSRX are tied together with a resistor. Shorting these lines will lead to stubs on the 5GGbps signal path. Another stub will be formed with the SMA connectors. This will significantly degrade signal quality and may result in a compliance fail.

See the following block diagram for a correct implementation.

Option1: Use a active redriver such as the TUSB542. This part will provide the functionality of both a redriver and a crossbar MUX.

Option 2: Use a redriver + MUX:

To pull out the signals to a SMA interface, its best to use the USB compliance fixtures found on the USBIF website: https://www.usb.org/compliancetools

Interface

Interface forum

TUSB522P: Review Request for TUSB522P Redriver schematic and Layout suggestion point