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

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?

  • 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.