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CDCLVC1103: Sine wave input -> Square wave output

Eric Phillips
Prodigy 50 points
Part Number: CDCLVC1103

I am trying convert a 100MHz sinusoid from a OCXO to a 100MHz square wave and then fanout to 3 signal paths.   I was looking at using the CDCLVC1103 to do this, but most of what I'm seeing is discussion of the input already as a square wave.  Is there any further information whether I can use this part to accomplish the "squaring up" task?

Thanks.

  • 0
    TI__Expert 4960 points

    Hello Eric,

    This device is a Fan-out Clock Buffer meaning this will provide additional outputs of the same input.

    The 'squaring up' task will be best accomplished utilizing a clock generator which utilizes a Phase-Locked Loop (PLL), please advise if any specific output is required.

    Please advise if 100 MHz OCXO crystal is required or this can be changed to another frequency?

  • 0 in reply to Aaron Black
    Prodigy 50 points

    Aaron -

    Thanks for your reply.

    The 100MHz OCXO is what my design is being provided and that frequency is set and isn't adjustable.

    I found some sine-to-square wave IC's from TI, but they unfortunately top out at 52MHz max input.

    Output-wise I'd like to square up the sine wave to a signal that's LVTTL (3.3 to 0V) then provide that to the CDCLVC1103 to distribute.

    Thanks.

  • 0 in reply to Eric Phillips
    TI__Expert 4960 points

    Hello Eric,

    Per CDCLVC1103 datasheet the required slew rate is between 1-4V/ns, using the CDCLVC1103 will be fine as long as you can 'square-up' the signal to this range.

    An OCXO input should be fine to be used through most input pins, such as CLKin, Fin, etc.

    For ease of use please consider using a Clock Generator with LVCMOS outputs or configurable outputs.