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Original question:

CDCLVP1216: Delete pull-up and pull-down resistors

CDCLVP1216: looking for clock distribution (30MHz) solution for 36 devices

David Hu
Prodigy 90 points
Part Number: CDCLVP1216
Other Parts Discussed in Thread: LMK00338, LMK00334, CDCLVC1112

Dear Sir,

We have a project which need many clocks which offer 30MHz clk to the devices.the solution should work in high temperature champer (85 degrees) for a long time.
In a word, we need the solution which have 30MHz crystal input and 36 copies of single-ended clock output(30MHz).
do you have a suitable solution offering to us, tks!
Block Diagram as attached!

Regards,
David hu

  • 0
    Prodigy 90 points

    Below pic is the block diagram, and the clock solution is we needed, we have the socket SOP8 array, total 36 pcs Socket, so needed 36 copies of clk which can offer 30MHz clock signal to the socket

  • 0 in reply to David Hu
    TI__Genius 16845 points
    Hi David,

    CDCLVP1216 is a good choice here for the CLK Distributor.

    If you are interested in a clock solution with an integrated crystal oscillator for XTAL, consider LMK00334 or LMK00338.

    Kind regards,
    Lane
  • 0 in reply to Lane Boyd
    Prodigy 90 points
    Lane,
    Tks!
    I still have two more questions.
    1, we hope the output format is single ended, here should be differential, right? can do as single ended?
    2, we hope the operating temperature can be more higher, because it will work in the high temp chamber for a long time.

    I wonder whether CDCLVP1216 can meet both of the requirements?

    Kind regards,
    David Hu
  • 0 in reply to David Hu
    Prodigy 90 points
    The output format should be single ended, and offer 30MHz to the devices, can CDCLVP1216 meet this requirement, if so, how to connect the signal? using the positive signals?
  • 0 in reply to David Hu
    TI__Genius 16845 points
    Hi David,

    The output format of CDCLVP1216 is differential. For a distributor with single-ended output format, I would recommend CDCLVC1112, but it only has 12 outputs.

    It may be possible to use the differential output as single ended. First you will need to verify that the output levels of CDCLVP1216 are compatible with the input levels or your receiver devices.

    Ambient temp should not exceed 85C max, but CDCLVP1216 junction operate at slightly higher temperatures. You can measure the PCB temp at the thermal pad; CDCLVP1216 will have datasheet guaranteed performance as long as the board does not exceed the PCB temperature specification of 105C.

    Kind regards,
    Lane