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TS3DDR4000: Using TS3DDR4000 for switching RGMII signals for connecting two PHY with one RGMII interface

Manoj Agarwal
Prodigy 150 points
Part Number: TS3DDR4000

Tool/software:

Hi Team,

In our application we need to connect two phy with one Host RGMII interface, we are thinking of using MUX TS3DDR4000. Please let me know if this will work. We are using in 24V instrument clauster application. Attached is our BD. 

  • 0
    TI__Expert 3255 points

    Hi Manoj,

    It looks like RGMII's frequency can range from 2.5MHz to 125MHz, which would be compatible with the bandwidth of this device. However, could you please clarify what you mean by "24V instrument clauster application"? If you are trying to power your mux with more than 4.8V or pass signals more than 5.5V through the mux, you will need to use another device. Let me know and I'll be happy to help you find the right device!

    Best,
    Katy

  • 0 in reply to Katy West
    Prodigy 150 points

    Hi Katy,

    Thanks, for reply, I understand that from speed point of view of RGMII interface, TS3DDR4000, would be sufficient? , Please confirm. 

    Also, with 24V instrument cluster application, means we are using this device in automate application, so we need AECQ part for this,   

    Voltage supply for TS3DDR4000 would be given as per mentioned in datasheet.  If you have any other suitable device for this automotive application, then please let me know. Can we communicate on this over email. Also, any application notes for this device being used for such case in automotive application.

  • 0 in reply to Manoj Agarwal
    TI__Expert 3255 points

    Hi Manoj,

    I do not know the specific bandwidth of your application, but as long as it is 5-7x smaller than the bandwidth of TS3DDR4000, which is 5.6 or 6GHz, you should be fine.

    Understood that you are powering the mux as per datasheet spec, but are you planning on passing a 24V signal through the mux? If so, you will need a mux that is rated for higher voltage than TS3DDR4000. Additionally, TS3DDR4000 is not auto qualified. 

    I would love to help you find a good fit that is auto qualified if that is what is needed - could you provide me with the following information?

    • VCC voltage
    • Voltage of signals being passed through the mux
    • Frequency of the signals being passed
    • How many channels needed

    Thanks,
    Katy

  • 0 in reply to Katy West
    Prodigy 150 points

    Hi Katy,

    Below is answer,

    NO, we are not passing signals through mux which are having 24V systems. 

    VCC voltage ok either 1.8V, 3.3V or 5V, we have both rails available. 

    Voltage of the signal could be either 3.3V or 1.8V

    Frequency of signals could be less than 500Mhz.

    No of channel required. is around 12-16. Please provide both option of 12 and 16 channel device.

    Regards

    Manoj A

  • 0 in reply to Manoj Agarwal
    TI__Expert 3255 points

    Hi Manoj,

    Thanks for the details! It looks like we only have one auto-qualified 2:1 multiplexer with 12 channels, and none with 16.

    TS3DV642-Q1 should be a great fit for your 12 channel application. It can be powered at 3.3V, can pass the voltage of your I/O signals, and has a 5.8GHz bandwidth.

    Best,
    Katy