Table 41. I/O Current Injection Susceptibility - STMicroelectronics STM32L151CB Manual

Electrical characteristics
Functional susceptibility 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, out of spec current
injection on adjacent pins or other functional failure (for example reset, oscillator frequency
deviation, LCD levels, etc.).
The test results are given in
Symbol
I
INJ
Note: It is recommended to add a Schottky diode (pin to ground) to analog pins which may
potentially inject negative currents.
80/129
Table 41.

Table 41. I/O current injection susceptibility

Description
Injected current on all 5 V tolerant (FT) pins
Injected current on any other pin
DocID17659 Rev 10
STM32L151x6/8/B, STM32L152x6/8/B
Functional susceptibility
Negative Positive
injection injection
-5 +0
-5 +5
Unit
mA