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clock divison and distribution

SM
Expert 1730 points
Other Parts Discussed in Thread: LMK01801, LMK03318, LMK01010, LMK01020, LMK01000

Hello,

    We need to generate 10MHz from a 100MHz external reference. Further the 10MHz and 100MHz also need to be distributed to at least 2 more devices (and in another project to 4 more each).

Please advise on a suitable part,

Thank you,

  • 0
    TI__Genius 15530 points

    SM,

    To be clear: you require a part that takes in a 100 MHz reference, and provides both 10 MHz and 100 MHz to up to 4 other devices (in addition to the initial 10 MHz)?
    What are the formats of the input and output clocks? Are these differential or single-ended? 

    Is there a requirement for synchronization of these clocks to the input clock?

     The LMK01801 clock buffer supports the required output count, and has output dividers for dividing the 100 MHz clock down to 10 MHz.

    The LMK03318 clock generator is also a suitable solution.

    Thanks,
    Kadeem

  • 0 in reply to Kadeem Samuel
    Expert 1730 points

    Hello Kadeem,

            Thank you for the input. May I ask if there is a simpler solution that will just do 100MHz to 10MHz divison?

    Regards

  • 0 in reply to SM
    TI__Genius 15530 points

    SM,

    If these clocks are all LVCMOS, then the CDCE(L)913/CDCE(L)925/CDCE(L)937/CDCE(L)949 parts can be used in bypass mode to provide the required clocks.

    LMK01000, LMK01010, and LMK01020 are all dividers with the output formats listed in the table below:

    How many total of each clock are needed, and what are the input and output formats of these clocks?

    Thanks,
    Kadeem