STM32L452VCU6TR datasheet(143/210 Pages) STMICROELECTRONICS

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STM32L452xx

Electrical characteristics

186

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 VDDIOx, plus the maximum

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

ΣIVDD (see Table 20: Voltage characteristics).

•

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

the MCU sunk on VSS, cannot exceed the absolute maximum rating ΣIVSS (see

Table 20: Voltage characteristics).

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 23: General operating conditions. All I/Os are CMOS- and TTL-compliant (FT OR TT

unless otherwise specified).

Input/output AC characteristics

The definition and values of input/output AC characteristics are given in Figure 26 and

Table 73, respectively.

Table 72. Output voltage characteristics(1)

Symbol

Parameter

Conditions

Min

Max

Unit

VOL

Output low level voltage for an I/O pin

CMOS port(2)

|IIO| = 8 mA

VDDIOx ≥ 2.7 V

-0.4

VOH

Output high level voltage for an I/O pin

VDDIOx-0.4

VOL(3) Output low level voltage for an I/O pin

TTL port(2)

|IIO| = 8 mA

VDDIOx ≥ 2.7 V

-0.4

VOH(3) Output high level voltage for an I/O pin

2.4

VOL(3) Output low level voltage for an I/O pin

|IIO| = 20 mA

VDDIOx ≥ 2.7 V

-1.3

VOH(3) Output high level voltage for an I/O pin

VDDIOx-1.3

VOL(3) Output low level voltage for an I/O pin

|IIO| = 4 mA

VDDIOx ≥ 1.62 V

-0.45

VOH(3) Output high level voltage for an I/O pin

VDDIOx-0.45

VOL(3) Output low level voltage for an I/O pin

|IIO| = 2 mA

1.62 V ≥ VDDIOx ≥ 1.08 V

-0.35ₓVDDIOx

VOH(3) Output high level voltage for an I/O pin

0.65ₓVDDIOx

VOLFM+

(3)

Output low level voltage for an FT I/O

pin in FM+ mode (FT I/O with "f"

option)

|IIO| = 20 mA

VDDIOx ≥ 2.7 V

-0.4

|IIO| = 10 mA

VDDIOx ≥ 1.62 V

-0.4

|IIO| = 2 mA

1.62 V ≥ VDDIOx ≥ 1.08 V

-0.4

1. The IIO current sourced or sunk by the device must always respect the absolute maximum rating specified in Table 20:

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 ΣIIO.

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

3. Guaranteed by design.

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