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Push-pull vs open drain

Question asked by Lukasz Przenioslo on Oct 16, 2017
Latest reply on Oct 16, 2017 by AvaTar

Hello there,

I have noticed that in the newer STM32 chips it is possible to configure the GPIO's in 2 kinds of output states:

  • Push-pull
  • Open-drain

I was wondering which option is drawing less current for driving simple ON/ OFF logic at low frequency? Is it better to use Push-pull without internal pull-up/ pull-down or open-drain + internal pull-up?

I would appreciate all help.

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