Table 47. Output Voltage Characteristics - STMicroelectronics STM32F031F4 Manual

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Electrical 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
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

The sum of the currents sourced by all the I/Os on V
consumption of the MCU sourced on V

I
VDD

The sum of the currents sunk by all the I/Os on V
the MCU sunk on V
Table 15: Voltage
Output voltage levels
Unless otherwise specified, the parameters given in the table below are derived from tests
performed under the ambient temperature and supply voltage conditions summarized in
Table 18: General operating
TC unless otherwise specified).
Symbol
V Output low level voltage for an I/O pin
OL
V Output high level voltage for an I/O pin
OH
V Output low level voltage for an I/O pin
OL
V Output high level voltage for an I/O pin
OH
(3)
V Output low level voltage for an I/O pin
OL
(3)
V Output high level voltage for an I/O pin
OH
(3)
V Output low level voltage for an I/O pin
OL
(3)
V Output high level voltage for an I/O pin
OH
Output low level voltage for an FTf I/O pin in
(3)
V
OLFm+
Fm+ mode
1. The I current sourced or sunk by the device must always respect the absolute maximum rating specified in
IO
Voltage characteristics, and the sum of the currents sourced or sunk by all the I/Os (I/O ports and control pins) must always
respect the absolute maximum ratings 
2. TTL and CMOS outputs are compatible with JEDEC standards JESD36 and JESD52.
3. Data based on characterization results. Not tested in production.
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(see Table 15: Voltage
, cannot exceed the absolute maximum rating
SS
characteristics).
conditions. All I/Os are CMOS- and TTL-compliant (FT, TTa or

Table 47. Output voltage characteristics

Parameter
I
IO .
DocID025743 Rev 3
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/V ).
OL OH
Section
cannot exceed the absolute maximum rating
DD,
characteristics).
SS
Conditions
CMOS port
|I | = 8 mA
IO

V 2.7 V
DDIOx
TTL port
|I | = 8 mA
IO

V 2.7 V
DDIOx
|I | = 20 mA
IO

V 2.7 V
DDIOx
|I | = 6 mA
IO
|I | = 20 mA
IO

V 2.7 V
DDIOx
|I | = 10 mA
IO
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STM32F031x4 STM32F031x6
6.2:
plus the maximum
DDIOx,
, plus the maximum consumption of

I
VSS
(1)
Min
(2)
-
V –0.4
DDIOx
(2)
-
2.4
-
V –1.3
DDIOx
-
V –0.4
DDIOx
-
-
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(see
Max Unit
0.4
V
-
0.4
V
-
1.3
V
-
0.4
V
-
0.4 V
0.4 V
Table 15: