STM32F301C6 datasheet(84/135 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F301x6 STM32F301x8

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DocID025146 Rev 6

Static latch-up

Two complementary static tests are required on six parts to assess the latch-up

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 EIA/JESD 78A IC latch-up standard.

6.3.13

I/O current injection characteristics

As a general rule, current injection to the I/O pins, due to external voltage below VSS or

above VDD (for standard, 3 V-capable I/O pins) should be avoided during normal product

operation. However, in order to give an indication of the robustness of the microcontroller in

cases when abnormal injection accidentally happens, susceptibility tests are performed on a

sample basis during device characterization.

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 above a certain limit (higher

than 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 occurrence or oscillator

frequency deviation).

The test results are given in Table 53

Note:

It is recommended to add a Schottky diode (pin to ground) to analog pins which may

potentially inject negative currents.

Table 52. Electrical sensitivities

Symbol

Parameter

Conditions

Class

Static latch-up class

TA = +105 °C conforming to JESD78A

2 level A

Table 53. I/O current injection susceptibility

Symbol

Description

Functional susceptibility

Unit

Negative

injection

Positive

injection

IINJ

Injected current on BOOT0

-0

Injected current on PC0 pin (TTa pin)

-0

Injected current PC0, PC1, PC2, PC3, PA0, PA1, PA2,

PA3, PA4, PA6, PA7, PC4, PB0, PB10, PB11, PB13 with

induced leakage current on other pins from this group

less than -100 µA or more than +100 µA

-5

Injected current on any other TT, FT and FTf pins

-5

Injected current on all other TC, TTa and RESET pins

-5

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