PN7462 temperature issues over 50°C

Discussion created by Jean-Luc CHAILLAT on Jun 29, 2020
Latest reply on Jun 29, 2020 by vicentegomez

Hi everybody,

I developed a custom card reader for contact and contactless smart card, this card reader is expected to run in an outdoor environment and with a temperature up to 70°C

I have issues when the ambient temperature goes over 50°C with contact cards.

The issues are :

  • ATR is corrupted or
  • During APDU exchanges, frames are corrupted.


The NXP data sheet says the PN7462 should work up to 85°C

The firmware of the reader comes from the NXP example PN7462AU_ex_phExCcid where the 2 temperature sensors of the PN7462 are disabled.


Does anyone met similar issues? Any idea ?




Jean-Luc Chaillat