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Original question:

TUSB1104: TUSB1104

TUSB1104: TUSB1104IRNQR: Schemtic for review

Udesh Singla
Intellectual 460 points
Part Number: TUSB1104
Other Parts Discussed in Thread: TUSB1044

Tool/software:

HI 

We have completed the schematic with TUSB1104IRNQR. We are using the type c connector in which we are support Type c Gen 3.2 and display alt mode functionality.

Please find the attached schematic and provide the review comments.

VVDN_TI_ORBU_P2I7_Redriver_A0-45.pdf

  • 0
    TI__Mastermind 21150 points

    Hi,

    Can you show a block diagram of your system? The TUSB1104 supports USB3.2x2 signaling, but does not support DisplayPort Alt-mode. 

    A better part may be the TUSB1044. This is a USB re-driver that supports up to 10G USB data and DP alt-mode on either source or sink side applications.

    See this E2E post for more info.

    Best,

    Shane

  • 0 in reply to Shane Hauser
    Intellectual 460 points

    HI Shane

    Yes we know that this part does not support ALT mode, but we need type C speed of 20Gbps which TUSB1044 will not support,

    So we have used TUSB1104 part and added one mux to support the display functionality.

  • 0 in reply to Udesh Singla
    TI__Mastermind 21150 points

    Hi Udesh,

    I am concerned that this will not work because, per the USB spec, you cannot combine USB3.2x2 and DP alt mode:

    If you'd like, I can check the implementation of the TUSB1104 for USB3.2x2 mode. But I cannot help to make it work with DP Alt-mode.

    Best,

    Shane

  • 0 in reply to Shane Hauser
    Intellectual 460 points

    HI Shane 

    Regarding the display functionality, the same approach is followed by intel also and they have used the external mux for the display mode functionality.

    You can please check the TUSB1104 for USB3.2x2 mode functionality.

  • 0 in reply to Udesh Singla
    TI__Mastermind 21150 points

    Hi Udesh,

    1. The signal lines are swapped between the 1104 to the Type-C connector. Please route the TX/RX from the 1104 to the appropriate TX/RX on the Type-C connector:

    2. I don't see the size of your AC capacitors or pulldown resistors on the SS lines. Please make sure these are size 0201 to minimize signal reflections.

    3. It looks like the MODE pin is pulled to GND. This is a reserved mode for our device. You should pull this up for Pin strap mode or leave it NC for I2C mode.

    4. If you plan to use I2C mode, please add pullup resistors on the SDA and SCL lines to your I2C voltage. Typically we recommend using 4.7K as the value for these pullups.

    Best,

    Shane