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Electrical characteristics
ST72324B-Auto
12.8.3
Absolute maximum ratings (electrical sensitivity)
Based on three different tests (ESD, LU and DLU) using specific measurement methods, the
product is stressed in order to determine its performance in terms of electrical sensitivity.
For more details, refer to the application note AN1181.
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 pin). Two models
can be simulated: Human Body Model and Machine Model. This test conforms to the
JESD22-A114A/A115A standard.
Static and dynamic Latch-Up
●
LU: 3 complementary static tests are required on 10 parts to assess the latch-up
performance. A supply overvoltage (applied to each power supply pin) and a current
injection (applied to each input, output and configurable I/O pin) are performed on each
sample. This test conforms to the EIA/JESD 78 IC latch-up standard. For more details,
refer to the application note AN1181.
●
DLU: Electrostatic discharges (one positive then one negative test) are applied to each
pin of three samples when the micro is running to assess the latch-up performance in
dynamic mode. Power supplies are set to the typical values, the oscillator is connected
as near as possible to the pins of the micro and the component is put in reset mode.
This test conforms to the IEC1000-4-2 and SAEJ1752/3 standards. For more details,
refer to the application note AN1181.
Table 103.
Absolute maximum ratings
Symbol
Ratings
Conditions
Maximum value(1)
1.
Data based on characterization results, not tested in production.
Unit
VESD(HBM)
Electrostatic discharge voltage
(human body model)
TA = +25°C
2000
V
VESD(MM)
Electrostatic discharge voltage
(machine model)
200
VESD(CDM)
Electrostatic discharge voltage
(charged device model)
750
Table 104.
Electrical sensitivities
Symbol
Parameter
Conditions
Test
specification
Test result
LU
Static latch-up class
TA = +25°C
TA = +85°C
TA = +125°C
EIA/JESD 78
Passed
DLU
Dynamic latch-up class
VDD = 5.5V
fOSC = 4MHz
TA = +25°C
IEC1000-4-2
and
SAEJ1752/3
Passed