CD00253742 Datasheet, PDF (86/120 Pages) STMicroelectronics – XL-density performance line ARM-based 32-bit MCU

Electrical characteristics
Figure 42. 5 V tolerant I/O input characteristics - CMOS port
STM32F103xF, STM32F103xG
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Figure 43. 5 V tolerant I/O input characteristics - TTL port


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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 relaxedV_OL/V_OH) except PC13, PC14 and PC15 which can sink
or source up to ±3 mA. When using the GPIOs PC13 to PC15 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 5.2:
● 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
I_VDD (see Table 8).
● 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
I_VSS (see Table 8).
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