Datasheet
Electrical characteristics STM32H743xI
130/231 DS12110 Rev 5
Static latchup
Two complementary static tests are required on six parts to assess the latchup
performance:
A
supply overvoltage is applied to each power supply pin
A current injection is applied to each input, output and configurable I/O pin
These tests are compliant with JESD78 IC latchup standard.
6.3.14 I/O current injection characteristics
As a general rule, a current injection to the I/O pins, due to external voltage below V
SS
or
above V
DD
(for standard, 3.3 V-capable I/O pins) should be avoided during the normal
product operation. However, in order to give an indication of the robustness of the
microcontroller in cases when an abnormal injection accidentally happens, susceptibility
tests are performed on a sample basis during the device characterization.
Functional susceptibilty to I/O current injection
While a simple application is executed on the device, the device is stressed by injecting
current into the I/O pins programmed in floating input mode. While current is injected into
the I/O pin, one at a time, the device is checked for functional failures.
The failure is indicated by an out of range parameter: ADC error above a certain limit (higher
tha
n 5 LSB TUE), out of conventional limits of induced leakage current on adjacent pins (out
of –5 µA/+0 µA range), or other functional failure (for example reset, oscillator
frequency
deviation).
The following tables are the compilation of the
SIC1/SIC2 and functional ESD results.
NegativeinducedA negative induced leakage current is caused by negative injection and
positive induced leakage current by positive injection.
Table 57. Electrical sensitivities
Symbol Parameter Conditions Class
LU Static latchup class T
A
=+25 °C conforming to JESD78 II level A
Table 58. I/O current injection susceptibility
(1)
Symbol Description
Functional susceptibility
Unit
Negative
injection
Positive
injection
I
INJ
PA7, PC5, PG1, PB14, PJ7, PA11, PA12, PA13, PA14, PA15,
PJ12, PB4
50
mA
PA2, PH2, PH3, PE8, PA6, PA7, PC4, PE7, PE10, PE11 0 NA
PA0, PA_C, PA1, PA1_C, PC2, PC2_C, PC3, PC3_C, PA4,
PA5, PH4, PH5, BOOT0
00
All other I/Os 5 NA
1. Guaranteed by characterization.