Datasheet

DocID025977 Rev 6 165/258
STM32L486xx Electrical characteristics
232
All I/Os are CMOS- and TTL-compliant (no software configuration required). Their
characteristics cover more than the strict CMOS-technology or TTL parameters. The
coverage of these requirements is shown in
Figure 25 for standard I/Os, and in Figure 25 for
5 V tolerant I/Os.
Figure 25. 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
).
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 V
DDIOx,
plus the maximum
consumption of the MCU sourced on V
DD,
cannot exceed the absolute maximum rating
I
VDD
(see Table 20: Voltage characteristics).
• The sum of the currents sunk by all the I/Os on V
SS
, plus the maximum consumption of
the MCU sunk on V
SS
, cannot exceed the absolute maximum rating I
VSS
(see
Table 20: Voltage characteristics).
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