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PCF8563 pull-up resistors dimensioning

Question asked by Antonio Cinelli on Apr 26, 2016
Latest reply on Jun 3, 2016 by David Diaz Marin

Hi all,

regarding the d.s. of the PCF8563, at pag. 29, tab. 29, are showed some minimum currents.

In order to dimension the pull-up resistors, it is not clear why are not showed the max values instead of the min ones, because it is open drain, so if the try to connect it directly to Vcc, isn't it in short circuit ?

Furthermore, in the UM10301 there are pull-up values, from whom you can deduct the currents values that are lower then in the tab 29.

Please can you clarify this aspect ?

Thanks a lot