STM32U375CE datasheet(117/222 Pages) STMICROELECTRONICS

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Symbol

Paramet

Conditions

Typ

Max(1)

Unit

VDD

25°C

55°C

85°C

105°C

30°C

55°C

85°C

105°C

IDD(VBAT

with RTC)

Supply

current in

VBAT

mode

(backup

registers

retained),

RTC

enabled

RTC(2)

clocked by

LSE quartz

in low-drive

mode

1.8

0.42

0.51

0.79

1.35

µA

2.4

0.47

0.56

0.86

1.40

0.52

0.63

0.97

1.60

3.3

0.59

0.75

1.30

2.25

3.6

0.75

0.98

1.60

2.70

RTC(2)

clocked by

LSE quartz

in low-drive

mode,

RTC_CALR

. LPCAL =

1.8

0.35

0.43

0.72

1.25

2.4

0.37

0.45

0.76

1.30

0.39

0.49

0.84

1.45

3.3

0.44

0.60

1.15

2.10

3.6

0.58

0.81

1.45

2.55

1. Evaluated by characterization. Not tested in production.

2. RTC with default configuration except for what is specified

I/O system current consumption

The current consumption of the I/O system has two components: static and dynamic.

I/O static current consumption

All the I/Os used as inputs with pull-up or pull-down generate current consumption when the pin is externally held

to the opposite level. The value of this current consumption can be simply computed by using the pull-up/pull-

down resistors values given in Section 5.3.14: I/O port characteristics.

For the output pins, any internal or external pull-up or pull-down or external load must also be considered to

estimate the current consumption.

Additional I/O current consumption is due to I/Os configured as inputs if an intermediate voltage level is externally

applied. This current consumption is caused by the input Schmitt trigger circuits used to discriminate the input

value. Unless this specific configuration is required by the application, this supply current consumption can be

avoided by configuring these I/Os in analog mode. This is notably the case of the ADC input pins that must be

configured as analog inputs.

Caution:

Any floating input pin can also settle to an intermediate voltage level or switch inadvertently, as a result of

external electromagnetic noise. To avoid current consumption related to floating pins, they must either be

configured in analog mode, or forced internally to a definite digital value. This can be done either by using pull-

up/down resistors or by configuring the pins in output mode.

I/O dynamic current consumption

In addition to the on-chip peripheral current consumption (see Table 67 for peripheral current consumption in Run

mode), the I/Os used by an application also contribute to the current consumption. When an I/O pin switches, it

uses the current from the I/O supply voltage to supply the I/O pin circuitry and to charge/discharge the capacitive

load (internal and external) connected to the pin:

ISW = VDDIOx × fSW × C

Where:

•

ISW is the current sunk by a switching I/O to charge/discharge the capacitive load.

•

VDDIOx is the I/O supply voltage.

•

fSW is the I/O switching frequency.

•

C is the total capacitance seen by the I/O pin: C = CINT + CEXT + CS.

•

CS is the PCB board capacitance including the pad pin.

The test pin is configured in push-pull output mode and is toggled by software at a fixed frequency.

STM32U375xx

Electrical characteristics

DS14861 - Rev 2

page 117/222

STM32U375CE Datasheet(PDF) 117 Page - STMicroelectronics

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