Recommended operating conditions

The operating conditions are the physical parameters that the chip can operate within.

Table 1. Recommended operating conditions
Symbol Parameter Notes Min. Nom. Max. Units
VDD VDD supply voltage, independent of DCDC enable 1.7 3.0 3.6 V
VDDPOR VDD supply voltage needed during power-on reset 1.75 V
VDDH VDDH supply voltage, independent of DCDC enable 2.5 3.7 5.5 V
VBUS VBUS USB supply voltage 4.35 5 5.5 V
tR_VDD Supply rise time (0 V to 1.7 V)   60 ms
tR_VDDH Supply rise time (0 V to 3.7 V)       100 ms
TA Operating temperature -40 25 85 °C
Important: The on-chip power-on reset circuitry may not function properly for rise times longer than the specified maximum.

Documentation feedback | Developer Zone | Updated 2017-07-06