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LMH6738 - Driving Disable pin

Paul Bryson
Intellectual 490 points

Other Parts Discussed in Thread: LMH6738, LMH6720

The datasheet indicates that the disable pin of the LMH6738 has very asymmetrical source/sink characteristics, 10uA/-350uA.   To me this implies an internal pull-up on this pin, but the datasheet does not say this.  

Can I drive this pin with an open drain without an external pull up resistor?

  • 0
    TI__Mastermind 22825 points

    Hi Paul,

    The LMH6738 shutdown circuitry is very similar to that of LMH6720. Here is what the LMH6720 datasheet shows:

    So,  you are correct in that there is an internal pull-up which ensure normal operation when Disable pin is left floating or open.

    Regards,

    Hooman