STM32F303 datasheet(56/133 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F302xx/STM32F303xx

56/133

Doc ID 023353 Rev 5

6.2

Absolute maximum ratings

Stresses above the absolute maximum ratings listed in Table 19: Voltage characteristics,

Table 20: Current characteristics, and Table 21: 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 19.

Voltage characteristics(1)

Symbol

Ratings

Min

Max

Unit

VDD–VSS

External main supply voltage (including VDDA, VBAT

and VDD)

-0.3

4.0

VDD–VDDA

Allowed voltage difference for VDD > VDDA

-0.4

VREF+–VDDA

(2)

Allowed voltage difference for VREF+ > VDDA

-0.4

VIN

(3)

Input voltage on FT and FTf pins

VSS − 0.3

VDD + 4.0

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

VESD(HBM)

Electrostatic discharge voltage (human body

model)

see Section 6.3.12: Electrical

sensitivity characteristics

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

permitted range. The following relationship must be respected between VDDA and VDD:

VDDA must power on before or at the same time as VDD in the power up sequence.

VDDA must be greater than or equal to VDD.

VREF+ must be always lower or equal than VDDA (VREF+ ≤ VDDA). If unused then it must be connected to VDDA.

VIN maximum must always be respected. Refer to Table 20: Current characteristics for the maximum allowed injected

current values.

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