STM32L151V6T6DTR 查看數據表（PDF） - STMicroelectronics

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STM32L151V6T6DTR

Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3, 128KB Flash, 16KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC

STMicroelectronics 

STM32L151x6/8/B STM32L152x6/8/B

Electrical characteristics

6.3.12

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.

Table 40. Electrical sensitivities

Symbol

Parameter

Conditions

LU

Static latch-up class TA = +105 °C conforming to JESD78A

Class

II level A

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 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, 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 Table 41.

Table 41. I/O current injection susceptibility

Symbol

Description

Functional susceptibility

Negative

Positive

Unit

injection

injection

Injected current on all 5 V tolerant (FT) pins

-5

IINJ

Injected current on any other pin

-5

+0

mA

+5

Note:

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

potentially inject negative currents.

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