STM32F091CB datasheet(52/127 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F091xB STM32F091xC

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DocID026284 Rev 3

6.2

Absolute maximum ratings

Stresses above the absolute maximum ratings listed in Table 21: Voltage characteristics,

Table 22: Current characteristics and Table 23: 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 21. 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 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

ΔVDDx|

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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