Datasheet

Electrical characteristics STM32F373xx
86/137 DocID022691 Rev 7
Figure 18. Five volt tolerant (FT and FTf) I/O input characteristics - CMOS port
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
).
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:
• The sum of the currents sourced by all the I/Os on all VDD_x and VDDSDx, plus the
maximum Run consumption of the MCU sourced on V
DD
cannot exceed the absolute
maximum rating
SI
VDD
(see Table 20).
• The sum of the currents sunk by all the I/Os on all VSS_x and VSSSD, plus the
maximum Run consumption of the MCU sunk on V
SS
cannot exceed the absolute
maximum rating
SI
VSS
(see Table 20).
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