What are the characteristics of the nRF52832 GPIO internal 'ESD structures'?

[nikolrobottesla]

What are the following characteristics for the 'ESD structures'/diodes pictured?

Reverse breakdown voltage, rated forward current, forward voltage

[run_ar]

The forward voltage of the diode structure is not explicitly specified, but by looking at the maximum ratings, you can deduct that the ESD structure has a drop of 0.3V (GND-0.3V, VDD_NRF+0.3V).

I cannot state breakdown voltage, nor the rated forward current, but what we specify is that the chip is guaranteed to withstand ESD HBM and CDM up to the specified maximum in our specification:

infocenter.nordicsemi.com/.../abs_max_ratings.html

Note that HBM and CDM differs depending on the type of mechanical package you're using.