STM32F042C4 datasheet(45/117 Pages) STMICROELECTRONICS

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STM32F042x4 STM32F042x6

Electrical characteristics

6.2

Absolute maximum ratings

Stresses above the absolute maximum ratings listed in Table 18: Voltage characteristics,

Table 19: Current characteristics

and Table 20: Thermal characteristics may cause

permanent damage to the device. These are stress ratings only and functional operation of

the device at these conditions is not implied. Exposure to maximum rating conditions for

extended periods may affect device reliability.

Table 18. Voltage characteristics(1)

1. All main power (VDD, VDDA) and ground (VSS, VSSA) pins must always be connected to the external power

supply, in the permitted range.

Symbol

Ratings

Min

Max

Unit

VDD–VSS

External main supply voltage

- 0.3

4.0

VDDIO2–VSS External I/O supply voltage

- 0.3

4.0

VDDA–VSS External analog supply voltage

- 0.3

4.0

VDD–VDDA Allowed voltage difference for VDD > VDDA

-0.4

VBAT–VSS External backup supply voltage

- 0.3

4.0

VIN(2)

2. VIN maximum must always be respected. Refer to Table 19: Current characteristics for the maximum

allowed injected current values.

Input voltage on FT and FTf pins

VSS - 0.3

VDDIOx + 4.0 (3)

3. Valid only if the internal pull-up/pull-down resistors are disabled. If internal pull-up or pull-down resistor is

enabled, the maximum limit is 4 V.

Input voltage on TTa pins

VSS - 0.3

4.0

Input voltage on any other pin

VSS - 0.3

4.0

|∆VDDx|

Variations between different VDD power pins

|VSSx - VSS|

Variations between all the different ground

pins

-50

VESD(HBM)

Electrostatic discharge voltage

(human body model)

see Section 6.3.12: Electrical

sensitivity characteristics

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