STM32L151RDT6 datasheet(98/140 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L151xD STM32L152xD

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Doc ID 022027 Rev 6

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 the non-standard VOL/VOH specifications given in Table 51.

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

IVDD (see Table 12).

●

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 12).

Output voltage levels

Unless otherwise specified, the parameters given in Table 51 are derived from tests

performed under ambient temperature and VDD supply voltage conditions summarized in

Table 14. All I/Os are CMOS and TTL compliant.

The max. value may be exceeded if negative current is injected on adjacent pins.

Pull-up and pull-down resistors are designed with a true resistance in series with a switchable PMOS/NMOS. This

MOS/NMOS contribution to the series resistance is minimum (~10% order)

Table 51.

Output voltage characteristics

Symbol

Parameter

Conditions

Min

Max

Unit

VOL

(1)(2)

The IIO current sunk by the device must always respect the absolute maximum rating specified in Table 12

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

Tested in production.

Output low level voltage for an I/O pin

when 8 pins are sunk at same time

IIO = +8 mA

2.7 V < VDD < 3.6 V

-0.4

VOH

(3)(2)

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

Table 12 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

2.4

VOL

(1)(4)

Output low level voltage for an I/O pin

when 8 pins are sunk at same time

IIO =+ 4 mA

1.65 V < VDD <

2.7 V

-0.45

VOH

(3)(4)

Output high level voltage for an I/O pin

when 8 pins are sourced at same time

VDD-0.45

VOL

(1)(4)

Based on characterization data, not tested in production.

Output low level voltage for an I/O pin

when 4 pins are sunk at same time

IIO = +20 mA

2.7 V < VDD < 3.6 V

-1.3

VOH

(3)(4)

Output high level voltage for an I/O pin

when 4 pins are sourced at same time

VDD-1.3

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