STM32H757AI datasheet(156/251 Pages) STMICROELECTRONICS

156 / 251 page

Electrical characteristics

STM32H757xI

156/251

DS12931 Rev 1

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 for FT I/Os is shown in Figure 27.

Figure 27. VIL/VIH for all I/Os except BOOT0

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. In particular:

•

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 21).

•

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 21).

6. VIN must be less than Max(VDDXXX) + 3.6 V.

7. To sustain a voltage higher than MIN(VDD, VDDA, VDD33USB) +0.3 V, the internal pull-up and pull-down resistors must be

disabled.

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

PMOS/NMOS contribution to the series resistance is minimal (~10% order).

9. Max(VDDXXX) is the maximum value of all the I/O supplies.

MSv46121V3

0.5

1.5

2.5

1.6

1.8

2.2

2.4

2.6

2.8

3.2

3.4

3.6

TLL requirement: VIHmin = 2 V

TLL requirement: VILmin = 0.8 V

CMOS

requirement:

VIHmin

=0.7V

CMOS

requirement:

VILmax

=0.3VDD

Based

on simulation

VIHmin=

0.47VDD

+0.25

Based

on simulation

VILmax

=0.4VDD

-0.1

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