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LMK00105: Can I connect multiple outputs in parallel to increase drive strength?

Andy Khan
Prodigy 65 points
Part Number: LMK00105

I need to drive a 50 ohm cable with a clean clock source and I would like to parallel multiple outputs of the LMK00105 to drive a series 50 ohm resistor and then the cable.  Is this possible with this part?

  • 0
    TI__Genius 9250 points

    Hi Andy,

    The output impedance of this buffer is 50 ohm. If you try to short them together then it would become 25 ohm. Unless your PCB trace is 25 ohm , you would want to add a series resistor of 25 ohm to match the impedance with transmission line which is usually 50 ohm. I think this would defeat the purpose of how you wanted to get more drive strength.

    Best,

    Asim