參數(shù)資料
型號(hào)： ST72254G1B7
英文描述： 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY. ADC. 16-BIT TIMERS. SPI.
中文描述： 8位單電壓閃存微控制器。 ADC的。 16位定時(shí)器。的SPI。
文件頁(yè)數(shù)： 20/140頁(yè)
文件大?。?/td> 1349K
代理商： ST72254G1B7
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ST72104G, ST72215G, ST72216G, ST72254G
116/140
EMC CHARACTERISTICS (Cont’d)
14.7.3 ESD Pin Protection Strategy
To protect an integrated circuit against Electro-
Static Discharge the stress must be controlled to
prevent degradation or destruction of the circuit el-
ements. The stress generally affects the circuit el-
ements 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 73 and Figure 74 for standard
pins and in Figure 75 and Figure 76 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 73. Positive Stress on a Standard Pad vs. VSS
Figure 74. 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
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ST72254G1B7/XXX 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, IC INTERFACES
ST72254G1M1 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY. ADC. 16-BIT TIMERS. SPI.
ST72254G1M1/XXX 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, IC INTERFACES
ST72254G1M3 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY. ADC. 16-BIT TIMERS. SPI.
ST72254G1M3/XXX 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, IC INTERFACES
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