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TS3DS10224: USB UART switch

Jimmy Chen61
Intellectual 420 points
Part Number: TS3DS10224


Hi,

I have get some confuse about TS3DS10224.

1. Does the device can support UART/USB switch?

2.  If INA+/- and INB+/- are 1.8V level, OUTA+/- and OUTB+/- output level are still 1.8V?

3.  If TS3DS10224 can’t use 1.8V level as input signal, and we need to add level shift before input into INA & INB?

  • 0
    TI__Expert 4120 points

    Hi Jimmy, 

    1. The TS3DS10224 is able to multiplex USB signals, UART should be possible as well. But as USB specifications are quite complex, you'd have to check for your specific application.

    2. Vout should be very close to Vin, there might be slight voltage drops.

    3. If you plan to control the TS3DS10224 from 1.8V logic you'd have to use a level shifter in front of the enable and select pins. 
    INA and OUT are specified from 0V to Vcc

    Best regards,

    Ambroise

  • 0 in reply to Ambroise Suter
    Prodigy 10 points

    Hi Ambroise,

    Thanks for your reply. I am Luxshare RD Eric.

    For our application, Vcc=3.3V, INA=UART (1.8V level), INB=USB2.0, ENA/ENB/SAI/SBI are controlled by 3.3V level.

    OUTA & OUTB level should be very close to INA & INB level and we don't need to add any level shifter, right?

    According to the above description, our circuits should be okay, right? 

    B.R.

    Eric

  • 0 in reply to Eric Lin2
    TI__Expert 4120 points

    Hi Eric, 

    thank you for the details.

    As long as the USB is below 3.3V, it should work.

    Pay attention to the impedance matching the get best performance on IN/OUT. Also no level switches are available in this case.

    Best regards,

    Ambroise