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SN75DP130: Allowable input level on SN75DP130

Izumi Maruyama
Intellectual 1350 points
Part Number: SN75DP130

Hello support team.

Datasheet of SN75DP130 says the VID as Peak-to-peak input differential voltage at RBR, HBR, HBR2 for MAIN LINK TERMINALS on SN75DP130 is 0.3Vp-p min and 1.4Vp-p.

However, VRX-DIFFp-p for RBR in the VESA DisplayPort Standard is 40mV then my customer is getting a confusion. Is this means SN75DP130 doesn’t support the VESA DisplayPort Standard? Please clarify how the customer need to think the allowable input level on SN75DP130. The customer said the actual voltage is a little bit less than 0.3Vp-p but not close to 40mVp-p. Of course the customer try to check the eye opening to follow the VESA DisplayPort Standard.

Best regards,

Izumi Maruyama

  • 0
    TI__Guru*** 139305 points

    Izumi-san

    These are two different definitions.

    VID spec in the datasheets is not peak-to-peak. For example, in the plot below VID is 400mV (the measured voltage difference between IN+ and IN- would generally be sometimes 400mV and sometimes -400mV), while the peak-to-peak value would be 800mV.



    Also, the 40mV peak to peak RBR is informative only, serves as a reference which Sink TP3 parameters are defined. A sink that passes compliance does not have to meet these informative parameter values. TP3 and TP3_EQ are where the compliance test is performed.

    Thanks
    David