STM32L552CEU6PTR datasheet(232/340 Pages) STMICROELECTRONICS

232 / 340 page

Electrical characteristics

STM32L552xx

232/340

DS12737 Rev 6

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 40 for standard I/Os, and in Figure 40 for

5 V tolerant I/Os.

Figure 40. 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 5.2:

•

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 24: 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 24: 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 27: General operating conditions. All I/Os are CMOS- and TTL-compliant (FT OR TT

unless otherwise specified).

MSv62973V1

Teste

d in

production

CMOS

requirement

Vih

min

= 0

.7xV

DDIO

Based

on simulati

on Vi

h min

= 0.

61xV

DDIOx

+0.05

for 1.08<V

DDIOx

<1.62

or 0.49xV

DDIOx

+0.2

6 for

VDDI

Ox>1

.62

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

Vil – Vih all IO

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