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CDCM61001: How can i get output 192MHz lvds diff clock?

user6331913
Prodigy 20 points
Part Number: CDCM61001

According to document of datasheet,  I can use Fin = Fout * (OUTPUT DIV / FEEDBACK DIV),  

Assume: Fout = 192MHz, 

if I set OUTPUT DIV = 2,  FEEDBACK DIV = 15;  so, Fin = 192 * 2 / 15 = 25.6MHz

the other paramers, I can not deal with it, all right?  

questions2:

if I use the 25.6MHz OSC,  3.3V,  how can I choose the OSC types ? 

  • 0
    TI__Mastermind 18070 points

    Hello,

    Equation 1 in the datasheet isn't complete. You also need to make sure that the VCO frequency is within the VCO range (in the datasheet).

    VCO_freq / prescaler / output_div = out_freq

    input_freq = VCO_freq / prescaler / feedback_div

    See page 9 and 10 of the datasheet for more calculation details. 

    Regards,
    Hao