参数资料
型号: ST72C314N4TC
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64
封装: 14 X 14 MM, ROHS COMPLIANT, TQFP-64
文件页数: 32/150页
文件大小: 3530K
代理商: ST72C314N4TC
ST72334xx-Auto, ST72314xx-Auto, ST72124Jx-Auto
127/150
EMC CHARACTERISTICS (Cont’d)
15.7.3 ESD Pin Protection Strategy
To protect an integrated circuit against Electrostat-
ic Discharge the stress must be controlled to pre-
vent degradation or destruction of the circuit ele-
ments. The stress generally affects the circuit ele-
ments which are connected to the pads but can
also affect the internal devices when the supply
pads receive the stress. The elements to be pro-
tected must not receive excessive current, voltage
or heating within their structure.
An ESD network combines the different input and
output ESD protections. This network works, by al-
lowing safe discharge paths for the pins subjected
to ESD stress. Two critical ESD stress cases are
presented in Figure 76 and Figure 77 for standard
pins and in Figure 78 and Figure 79 for true open
drain pins.
Standard Pin Protection
To protect the output structure the following ele-
ments are added:
– A diode to VDD (3a) and a diode from VSS (3b)
– A protection device between VDD and VSS (4)
To protect the input structure the following ele-
ments are added:
– A resistor in series with the pad (1)
– A diode to VDD (2a) and a diode from VSS (2b)
– A protection device between VDD and VSS (4)
Figure 76. Positive Stress on a Standard Pad vs. VSS
Figure 77. Negative Stress on a Standard Pad vs. VDD
IN
VDD
VSS
(1)
(2a)
(2b)
(4)
OUT
VDD
VSS
(3a)
(3b)
Main path
Path to avoid
IN
VDD
VSS
(1)
(2a)
(2b)
(4)
OUT
VDD
VSS
(3a)
(3b)
Main path
相关PDF资料
PDF描述
ST72124J2TC/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
ST72334J4TB/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44
ST72C314J2TC 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44
ST72314N4TA/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
ST72314N4TB/XXX 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP64
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