ST72340 datasheet(165/191 Pages) STMICROELECTRONICS

165 / 191 page

ST72340, ST72344, ST72345

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EMC CHARACTERISTICS (Cont’d)

13.9.3 Absolute Maximum Ratings (Electrical

Sensitivity)

Based on two different tests (ESD and LU) using

specific measurement methods, the product is

stressed in order to determine its performance in

terms of electrical sensitivity. For more details, re-

fer to the application note AN1181.

13.9.3.1 Electro-Static Discharge (ESD)

Electro-Static Discharges (a positive then a nega-

tive 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). Human Body Model can be simulated.

This test conforms to the JESD22-A114A/A115A

standard.

Absolute Maximum Ratings

Note:

1. Data based on characterization results, not tested in production.

13.9.3.2 Static and Dynamic Latch-Up

■ LU: 3 complementary static tests are required

on 6 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: Electro-Static Discharges (one positive

then one negative test) are applied to each pin

of 3 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.

Electrical Sensitivities

Symbol

Ratings

Conditions

Maximum value 1) Unit

VESD(HBM)

Electro-static discharge voltage

(Human Body Model)

TA=+25°C

>2000

Symbol

Parameter

Conditions

Class

Static latch-up class

TA=+25°C

TA=+85°C

DLU

Dynamic latch-up class

VDD=5.5V, fOSC=4MHz, TA=+25°C

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