nRF52832 Maximum GPIO Input Voltage

[webzoid]

I know that the nRF52832 is strictly a 3.3V device however, I was wondering whether any of the GPIO pins are 5V tolerant?

Is there any internal clamping diodes within the device which would clamp a 5V signal to 3.3V? 

[Andreas]

Hi,

 

No, none of the GPIOs are 5V tolerant. Absolute maximum rating is VDD+0.3V, exceeding this will make the ESD protection conduct.

 

Best regards,

Andreas

[genis]

Is that also true when the pins are configured in high impedance? What's the expected behavior if the pin is configured as high impedance or disconnected and there's a 5V or similar line connected to it?

[Andreas]

Hi,

 

Yes, this is also the case if the pins are disconnected (high-impedant state). Exceeding VDD+0.3V (or 3.9V if VDD>=3.6 V) will have the ESD diodes on the pins start conducting. 5V might not cause any damage but we can not guarantee anything if the max. rating is exceeded.

 

Best regards,

Andreas