Datasheet

DocID025644 Rev 3 93/135
STM32F401xD STM32F401xE Electrical characteristics
114
Figure 30. FT I/O input characteristics
Output driving current
The GPIOs (general purpose input/outputs) can sink or source up to ±8 mA, and sink or
source up to ±20 mA (with a relaxed V
OL
/V
OH
) except PC13, PC14 and PC15 which can
sink or source up to ±3mA. When using the PC13 to PC15 GPIOs in output mode, the
speed should not exceed 2 MHz with a maximum load of 30 pF.
In the user application, the number of I/O pins which can drive current must be limited to
respect the absolute maximum rating specified in Section 6.2. In particular:
• The sum of the currents sourced by all the I/Os on V
DD,
plus the maximum Run
consumption of the MCU sourced on V
DD,
cannot exceed the absolute maximum rating
ΣI
VDD
(see Table 12).
• The sum of the currents sunk by all the I/Os on V
SS
plus the maximum Run
consumption of the MCU sunk on V
SS
cannot exceed the absolute maximum rating
ΣI
VSS
(see Table 12).
Output voltage levels
Unless otherwise specified, the parameters given in Table 55 are derived from tests
performed under ambient temperature and V
DD
supply voltage conditions summarized in
Table 14. All I/Os are CMOS and TTL compliant.
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