STM32F105XX Datasheet, PDF (54/95 Pages) STMicroelectronics – Connectivity line, ARM-based 32-bit MCU with 64/256 KB Flash, USB OTG, Ethernet, 10 timers, 2 CANs, 2 ADCs, 14 communication interfaces

Electrical characteristics
STM32F105xx, STM32F107xx
Output driving current
The GPIOs (general purpose input/outputs) can sink or source up to +/-8 mA, and sink
+20 mA (with a relaxed V_OL).
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:
G 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 7).
G 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 7).
Output voltage levels
Unless otherwise specified, the parameters given in Table 36 are derived from tests
performed under ambient temperature and V_DD supply voltage conditions summarized in
Table 9. All I/Os are CMOS and TTL compliant.
Table 36. Output voltage characteristics
Symbol
Parameter
Conditions
Min
Max Unit
V_OL(1)
Output low level voltage for an I/O pin
when 8 pins are sunk at same time
TTL port
0.4
V_OH(2)
Output high level voltage for an I/O pin
when 8 pins are sourced at same time
I_IO = +8 mA
2.7 V < V_DD < 3.6 V V_DD–0.4
V
V_OL ⁽¹⁾
Output low level voltage for an I/O pin
when 8 pins are sunk at same time
CMOS port
I_IO =+ 8mA
V_OH ⁽²⁾
Output high level voltage for an I/O pin
when 8 pins are sourced at same time
2.7 V < V_DD < 3.6 V
2.4
0.4
V
V_OL(1)(3)
Output low level voltage for an I/O pin
when 8 pins are sunk at same time
I_IO = +20 mA
1.3
V
V_OH(2)(3)
Output high level voltage for an I/O pin
when 8 pins are sourced at same time
2.7 V < V_DD < 3.6 V _VDD–1.3
V_OL(1)(3)
Output low level voltage for an I/O pin
when 8 pins are sunk at same time
I_IO = +6 mA
0.4
V
V_OH(2)(3)
Output high level voltage for an I/O pin
when 8 pins are sourced at same time
2 V < V_DD < 2.7 V _VDD–0.4
1. The I_IO current sunk by the device must always respect the absolute maximum rating specified in Table 7
and the sum of I_IO (I/O ports and control pins) must not exceed I_VSS.
2. The I_IO current sourced by the device must always respect the absolute maximum rating specified in
Table 7 and the sum of I_IO (I/O ports and control pins) must not exceed I_VDD.
3. Based on characterization data, not tested in production.
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Doc ID 15274 Rev 4