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LMK1C1102: Connecting 2 separate device outputs together

Don DeOliveira
Prodigy 60 points
Part Number: LMK1C1102

Does the 1G output enable disable the output buffer to allow 2 different LMK1C1102 devices to drive the same signal - as in the pic below?  Is it a Hi-Z output when disabled or driven low?  I'm trying to select between 2 different clocks.

  • 0
    TI__Expert 6901 points

    Don,

    When the output is disabled the output will be driven low.  This means that at the node where clock 1 and 2 meet, there could be a DC voltage coming out of the disabled output of up to 0.2 x VDD, which could cause problems on the LVCMOS receiver side of wherever your clock signal is going.  A better option would be to use a buffer with an input multiplexer like the LMK00804B.

      

    Regards,

    Will