STM32F107VC datasheet(60/108 Pages) STMICROELECTRONICS

60 / 108 page

Electrical characteristics

STM32F105xx, STM32F107xx

60/108

DocID15274 Rev 10

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 VOL/VOH).

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 VDD, plus the maximum Run

consumption of the MCU sourced on VDD, cannot exceed the absolute maximum rating

IVDD (see Table 7).

•

The sum of the currents sunk by all the I/Os on VSS plus the maximum Run

consumption of the MCU sunk on VSS cannot exceed the absolute maximum rating

IVSS (see Table 7).

Output voltage levels

Unless otherwise specified, the parameters given in Table 37 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 9. All I/Os are CMOS and TTL compliant.

Table 37. Output voltage characteristics

Symbol

Parameter

Conditions

Min

Max

Unit

VOL(1)

1. The IIO current sunk by the device must always respect the absolute maximum rating specified in Table 7

and the sum of IIO (I/O ports and control pins) must not exceed IVSS.

Output low level voltage for an I/O pin

when 8 pins are sunk at same time

TTL port

IIO = +8 mA

2.7 V < VDD < 3.6 V

0.4

VOH(2)

2. The IIO current sourced by the device must always respect the absolute maximum rating specified in

Table 7 and the sum of IIO (I/O ports and control pins) must not exceed IVDD.

Output high level voltage for an I/O pin

when 8 pins are sourced at same time

VDD–0.4

VOL (1)

Output low level voltage for an I/O pin

when 8 pins are sunk at same time

CMOS port

IIO =+ 8mA

2.7 V < VDD < 3.6 V

0.4

VOH (2)

Output high level voltage for an I/O pin

when 8 pins are sourced at same time

2.4

VOL(1)(3)

3. Based on characterization data, not tested in production.

Output low level voltage for an I/O pin

when 8 pins are sunk at same time

IIO = +20 mA

2.7 V < VDD < 3.6 V

1.3

VOH(2)(3)

Output high level voltage for an I/O pin

when 8 pins are sourced at same time

VDD–1.3

VOL(1)(3)

Output low level voltage for an I/O pin

when 8 pins are sunk at same time

IIO = +6 mA

2 V < VDD < 2.7 V

0.4

VOH(2)(3)

Output high level voltage for an I/O pin

when 8 pins are sourced at same time

VDD–0.4

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