Datasheet
DocID025644 Rev 3 71/135
STM32F401xD STM32F401xE Electrical characteristics
114
Figure 21. Typical V
BAT
current consumption (LSE and RTC ON)
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 generate current consumption when the pin is
externally held low. The value of this current consumption can be simply computed by using
the pull-up/pull-down resistors values given in Table 54: I/O static characteristics.
For the output pins, any external 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
Table 31. Typical and maximum current consumptions in V
BAT
mode
Symbol Parameter Conditions
(1)
Typ Max
(2)
Unit
T
A
= 25 °C
T
A
=
85 °C
T
A
=
105 °C
V
BAT
=
1.7 V
V
BAT
=
2.4 V
V
BAT
=
3.3 V
V
BAT
= 3.6 V
I
DD_VBAT
Backup
domain supply
current
Low-speed oscillator (LSE) and RTC ON 0.66 0.76 0.97 3.0 5.0
µA
RTC and LSE OFF 0.1 0.1 0.1 2.0 4.0
1. Crystal used: Abracon ABS07-120-32.768 kHz-T with a C
L
of 6 pF for typical values.
2. Guaranteed by characterization, not tested in production.
-36
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6
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