參數(shù)資料
型號: ST72C171K2B6
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP32
封裝: SHRINK, PLASTIC, DIP-32
文件頁數(shù): 29/152頁
文件大?。?/td> 2156K
代理商: ST72C171K2B6
ST72C171
124/152
9.7 EMC CHARACTERISTICS
Susceptibility tests are performed on a sample ba-
sis during product characterization.
9.7.1 Functional EMS
(Electro Magnetic Susceptibility)
Based on a simple running application on the
product (toggling 2 LEDs through I/O ports), the
product is stressed by two electro magnetic events
until a failure occurs (indicated by the LEDs).
– ESD: Electro-Static Discharge (positive and neg-
ative) is applied on all pins of the device until a
functional disturbance occurs. This test con-
forms with the IEC 1000-4-2 standard.
– FTB: A Burst of Fast Transient voltage (positive
and negative) is applied to VDD and VSS through
a 100pF capacitor, until a functional disturbance
occurs. This test conforms with the IEC 1000-4-
4 standard.
A device reset allows normal operations to be re-
sumed.
Figure 73. EMC Recommended star network power supply connection 2)
Notes:
1. Data based on characterization results, not tested in production.
2. The suggested 10nF and 0.1
F decoupling capacitors on the power supply lines are proposed as a good price vs. EMC
performance tradeoff. They have to be put as close as possible to the device power supply pins. Other EMC recommen-
dations are given in other sections (I/Os, RESET, OSCx pin characteristics).
Symbol
Parameter
Conditions
Neg 1)
Pos 1)
Unit
VFESD
Voltage limits to be applied on any I/O pin
to induce a functional disturbance
VDD=5V, TA=+25°C, fOSC=8MHz
conforms to IEC 1000-4-2
-1
1
kV
VFFTB
Fast transient voltage burst limits to be ap-
plied 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
-4
4
VDD
VSS
0.1
F
10nF
VDD
ST72XXX
VSSA
VDDA
0.1
F
POWER
SUPPLY
SOURCE
ST7
DIGITAL NOISE
FILTERING
EXTERNAL
NOISE
FILTERING
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