ST72324BJ2 datasheet(151/188 Pages) STMICROELECTRONICS

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ST72324B

Electrical characteristics

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12.8.2

Electromagnetic interference (EMI)

Based on a simple application running on the product (toggling two LEDs through the I/O

ports), the product is monitored in terms of emission. This emission test is in line with the

norm SAE J 1752/3 which specifies the board and the loading of each pin.

Table 101.

EMS test results

Symbol

Parameter

Conditions

Level/class

VFESD

Voltage limits to be applied on any I/O pin to

induce a functional disturbance

32 Kbyte Flash or ROM device:

VDD = 5V, TA = +25°C, fOSC = 8MHz

conforms to IEC 1000-4-2

8 or 16 Kbyte ROM device:

VDD = 5V, TA = +25°C, fOSC = 8MHz

conforms to IEC 1000-4-2

8 or 16 Kbyte Flash device:

VDD = 5V, TA = +25°C, fOSC = 8MHz

conforms to IEC 1000-4-2

VFFTB

Fast transient voltage burst limits to be

applied through 100pF on VDD and VDD pins

to induce a functional disturbance

VDD = 5V, TA = +25°C, fOSC = 8MHz

conforms to IEC 1000-4-4

Table 102.

EMI emissions

Symbol

Parameter

Conditions

Device/package(1)

Monitored

frequency band

Max vs [fOSC/fCPU]

Unit

8/4 MHz

16/8 MHz

SEMI

Peak level(2)

VDD = 5V

TA = +25°C

conforming to

SAE J 1752/3

8/16 Kbyte Flash

LQFP32 and LQFP44

0.1 MHz to 30 MHz

dBµV

30 MHz to 130 MHz

130 MHz to 1 GHz

SAE EMI Level

3.5

32 Kbyte Flash

LQFP32 and LQFP44

0.1 MHz to 30 MHz

dBµV

30 MHz to 130 MHz

130 MHz to 1 GHz

SAE EMI Level

3.0

3.5

8/16 Kbyte ROM

LQFP32 and LQFP44

0.1 MHz to 30 MHz

dBµV

30 MHz to 130 MHz

130 MHz to 1 GHz

SAE EMI Level

3.0

3.5

32 Kbyte ROM

LQFP32 and LQFP44

0.1 MHz to 30 MHz

dBµV

30 MHz to 130 MHz

130 MHz to 1 GHz

SAE EMI Level

3.0

3.5

Refer to application note AN1709 for data on other package types.

Not tested in production.

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