STM32L4P5CE datasheet(203/310 Pages) STMICROELECTRONICS

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DS12903 Rev1

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STM32L4P5xx

Electrical characteristics

277

All I/Os are CMOS- and TTL-compliant (no software configuration required). Their

characteristics cover more than the strict CMOS-technology or TTL parameters. The

coverage of these requirements is shown in Figure 36 for standard I/Os, and in Figure 36 for

5 V tolerant I/Os.

Figure 36. I/O input 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 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 VDDIOx, plus the maximum

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

ΣIVDD (see Table 18: 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 18: 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 21: General operating conditions. All I/Os are CMOS- and TTL-compliant (FT OR TT

unless otherwise specified).

MSv37613V2

Teste

d in

production

CMOS

requirement

Vih

min

= 0

.7xV

DDIO

Based

on simulati

on Vi

h min

= 0.6

1xVDDIOx

+0.05

for 1.08<V

DDIOx

<1.62

or 0.49xV

DDIOx

+0.26

for V

DDIOx

>1.6

Based

on simu

lation

Vil m

ax =0.43xV

DDIOx

-0.1 for

1.08

<VDDIOx

<1.62

or 0.39xV

DDIOx

-0.06

for VDDIO

x>1.62

Tested

in produ

ction CMOS

requirement

Vil ma

x = 0.3xVdd

TTL requirement Vih min = 2V

TTL requirement Vil max = 0.8V

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