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About the input of LMX2581.

Satoshi
Guru 19645 points
Other Parts Discussed in Thread: LMK01010, LMK01020, LMK01000, CDCM1802, CDCE18005, CDCP1803

When 80-MHz carrying out a differential clock output, which shall be used between OSCin and Fin from a 640-MHz clock input?

If 640 MHz is put into Fin and an output divider is set as one eighth, I will think that an 80-MHz differential clock is outputted, but how to use OSCin at that time and Vtune is not known.

Please teach me a solution.

Thank you for your consideration.

  • 0
    TI__Guru** 109550 points

    Hi Satoshi,

    If you want to get a 80MHz differential clock output from a 640MHz clock input, I suggest use clock buffer instead of PLL synthesizer.

    For example, LMK01000, LMK01010, LMK01020, CDCE18005, CDCM1802, CECM1804, CDCP1803. These clock buffers all have built-in divider.