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SN65HVDA195 NWake

PAN-M
Mastermind 8375 points

Dear all.

In Figure 10 of datasheet, what kind of meaning is the resistance connected to a pin?
Our customer's design is pullup by 10K and short to GND by FET.
Is this a problem?

Regards,
PAN-M

  • 0
    TI__Mastermind 20820 points
    Hi Pan-M,

    The NWAKE pin needs to be externally pulled up with a resistor between 1kΩ and 10kΩ as it is only weakly pulled up internally. If the pin is left floating the weak pull up could be overcome by noise in the system and the device could toggle between states. Pulling it to ground via a FET should be no issue. Please let me know if you have any more questions and I will be glad to help!