STM32F303VB datasheet(89/148 Pages) STMICROELECTRONICS

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STM32F303xB STM32F303xC

Electrical characteristics

124

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 6.2:

•

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

ΣIVDD (see Table 22).

•

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

ΣIVSS (see Table 22).

Output voltage levels

Unless otherwise specified, the parameters given in Table 55 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 24. All I/Os (FT, TTa and TC unless otherwise specified) are CMOS and TTL

compliant.

Table 55. Output voltage characteristics

Symbol

Parameter

Conditions

Min

Max

Unit

VOL(1)

Output low level voltage for an I/O pin

CMOS port(2)

IIO = +8 mA

2.7 V < VDD < 3.6 V

-0.4

VOH(3)

Output high level voltage for an I/O pin

VDD–0.4

VOL (1)

Output low level voltage for an I/O pin

TTL port(2)

IIO = +8 mA

2.7 V < VDD < 3.6 V

-0.4

VOH (3)

Output high level voltage for an I/O pin

2.4

VOL(1)(4)

Output low level voltage for an I/O pin

IIO = +20 mA

2.7 V < VDD < 3.6 V

-1.3

VOH(3)(4)

Output high level voltage for an I/O pin

VDD–1.3

VOL(1)(4)

Output low level voltage for an I/O pin

IIO = +6 mA

2 V < VDD < 2.7 V

-0.4

VOH(3)(4)

Output high level voltage for an I/O pin

VDD–0.4

VOLFM+(1)(4)

Output low level voltage for an FTf I/O pin in

FM+ mode

IIO = +20 mA

2.7 V < VDD < 3.6 V

-0.4

1. The IIO current sunk by the device must always respect the absolute maximum rating specified in Table 22 and the sum of

IIO (I/O ports and control pins) must not exceed ΣIIO(PIN).

2. TTL and CMOS outputs are compatible with JEDEC standards JESD36 and JESD52.

3. The IIO current sourced by the device must always respect the absolute maximum rating specified in Table 22 and the sum

of IIO (I/O ports and control pins) must not exceed ΣIIO(PIN).

4. Data based on design simulation.

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