Electrical Sensitivity Characteristics; I/O Current Injection Characteristics; Table 47. Esd Absolute Maximum Ratings; Table 48. Electrical Sensitivities - STMicroelectronics STM32F042G4 Manual

STM32F042xx
6.3.12

Electrical sensitivity characteristics

Based on three different tests (ESD, LU) using specific measurement methods, the device is
stressed in order to determine its performance in terms of electrical sensitivity.
Electrostatic discharge (ESD)
Electrostatic discharges (a positive then a negative pulse separated by 1 second) are
applied to the pins of each sample according to each pin combination. The sample size
depends on the number of supply pins in the device (3 parts × (n+1) supply pins). This test
conforms to the JESD22-A114/C101 standard.
Symbol
V
ESD(HBM)
V
ESD(CDM)
1. Data based on characterization results, not tested in production.
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.
Symbol
LU
6.3.13

I/O current injection characteristics

As a general rule, current injection to the I/O pins, due to external voltage below V
above V
DDIOx
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.

Table 47. ESD absolute maximum ratings

Ratings
Electrostatic discharge
voltage (human body model)
Electrostatic discharge
voltage (charge device
model)

Table 48. Electrical sensitivities

Parameter
Static latch-up class
(for standard, 3.3 V-capable I/O pins) should be avoided during normal
DocID025832 Rev 2
Conditions
+25 °C, conforming
T
A
to JESD22-A114
+25 °C, conforming
T
A
to ANSI/ESD STM5.3.1
Conditions
+105 °C conforming to JESD78A
T
A
Electrical characteristics
Maximum
Class
(1)
value
2 2000
II 500
Class
II level A
or
SS
Unit
V
75/117
94