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TMDS181: TMDS181 with the input signal is LVDS or CML.

Frank Xiao
Genius 12055 points
Part Number: TMDS181

Hi team,

My customer want to use the TMDS181, but the input signal is LVDS or CML. Can they use the device here? Do you have some suggestions？ Thank you.

BR

Frank

  • 0
    TI__Mastermind 23815 points
    Hi Frank,

    TMDS181 is an HDMI2.0 retimer, not a general purpose retimer.
    HDMI works with TMDS which uses a current source to transmit signals.
    DP++ send HDMI video using DP electrical signaling, these are AC coupled signals. For DP++ we have DP139, DP149, DP159.

    Regards
  • 0 in reply to Moises Garcia
    TI__Genius 12055 points

    Hi,

    I want to check the DP port is the LVDS or CML. I have checked the datasheet of the DP159. From the internal block diagram, it seems the input is the CML. But from the input impedance, the input may be LVDS. Do you have some suggestions? Thank you.

    BR

    Frank

  • 0 in reply to Frank Xiao
    TI__Mastermind 23815 points

    Hi Frank,

    LVDS is a different video protocol, take a lookt at ti.com so know more about our LVDS portfolio

    CML is current mode logic, this si the one TMDS(HDMI) uses

    Displayport transmits signals with voltage levels, AC coupled.

    So, DP159 input is voltage level AC coupled, and output is CML, DC coupled.

    Regards