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TRS3221E: Support UART 1.8V CMOS

Shu-Cheng LIN
Guru 11785 points
Part Number: TRS3221E
Other Parts Discussed in Thread: TRS3122E

Hi Sirs,

Sorry to bother you.

Does TRS3221E have support UART 1.8V CMOS level?

If no ,should we need to refer TRS3122E?  but actually we only need 1 TX/RX.

Thanks!!

  • 0
    TI__Guru 62910 points

    Hello Shu-Cheng,

    No, TRS3221E does not support 1.8-V IO; it is intended for 3.3-V logic levels or higher.  For this application TRS3122E would be the better choice.  You could leave the unused RIN, ROUT, and DOUT ports floating and tie the unused DIN port to 0 V or 1.8 V.

    Max