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DS90C387: display dithering

Part Number: DS90C387

hi, dear

   We use DS90387 for RGB to LVDS for 17’’ LCD. There are 3 devices on the RGB bus , DVI, VGA and RGB2LVDS.

   The problem is that, the LCD display is dithering,  the input CLKIN of  ds90387  is about 100mHz sine wave.

  My question is that for the CLKIN of the ds90387, what’s the requirement for the  max and min value? 

   In the datasheet as follows, for VIL, the value is 0---0.8V, does it mean that the IC cannot identify the clock input as low-level if clock-input higher than 0.8V?