STM32L412R8Y6TR datasheet(128/192 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32L412xx

128/192

DS12469 Rev 4

Prequalification trials

Most of the common failures (unexpected reset and program counter corruption) can be

reproduced by manually forcing a low state on the NRST pin or the Oscillator pins for 1

second.

To complete these trials, ESD stress can be applied directly on the device, over the range of

specification values. When unexpected behavior is detected, the software can be hardened

to prevent unrecoverable errors occurring (see application note AN1015).

Electromagnetic Interference (EMI)

The electromagnetic field emitted by the device are monitored while a simple application is

executed (toggling 2 LEDs through the I/O ports). This emission test is compliant with

IEC 61967-2 standard which specifies the test board and the pin loading.

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 ANSI/JEDEC standard.

Table 65. EMI characteristics

Symbol

Parameter

Conditions

Monitored

frequency band

Max vs.

[fHSE/fHCLK]

Unit

8 MHz/ 80 MHz

SEMI

Peak level

VDD = 3.6 V, TA = 25 °C,

LQFP64 package

compliant with IEC

61967-2

0.1 MHz to 30 MHz

dBµV

30 MHz to 130 MHz

130 MHz to 1 GHz

1 GHz to 2 GHz

EMI Level

2.5

Table 66. ESD absolute maximum ratings

Symbol

Ratings

Conditions

Package

Class

Maximum

value(1)

Unit

VESD(HBM)

Electrostatic discharge voltage

(human body model)

TA = +25 °C, conforming

to ANSI/ESDA/JEDEC

JS-001

All

2000

VESD

Electrostatic discharge voltage

(charge device model)

TA = +25 °C,

conforming to

ANSI/ESDA/JEDEC-002

BGA64

C2a

500

All others

250

1. Guaranteed by characterization results.

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