參數(shù)資料
型號(hào)： SAK-TC1782-320F180HL
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 180 MHz, RISC MICROCONTROLLER, PQFP176
封裝： GREEN, PLASTIC, LQFP-176
文件頁(yè)數(shù)： 11/113頁(yè)
文件大?。?/td> 3371K
代理商： SAK-TC1782-320F180HL
TC1782
Electrical ParametersPin Reliability in Overload
Target Data Sheet/ACDC Target Specification 67
V 0.7 Preliminary, 2010-03
The Figure 20 also shows that exceeding the 3.7 V on a pin leads to the necessity of
calculating the failure rate in ppm, at high temperature and whole lifetime (50% duty
cycle assumed). The Figure 20 does not intend to describe accurately the physical laws
and is not to be used as a calculation tool but only as an illustration. Calculations must
be performed according to the described four steps procedure.
1.5.3
Negative Overload
The Negative Overload appears when the voltage on an input pin goes below the V
SS.
The stress on some GOX surfaces is determined by the difference between the V
DDP
power supply voltage and the voltage at the input pin. For example, if V
DDP = 3.3 V, and
V
IN = -0.7 V, than the internal stressing voltage is equal to 4 V. Generally, this kind of
stress influences fewer internal structures than the positive overload.
1.5.3.1
Reliability at High Temperatures
The reliability data given in this document is calculated for one pin of each relevant class.
The reliability of n pins is derived by multiplying the one-pin reliability with the number of
pins under consideration, of each pad class separately. The High Temperature case is
the worst case, although the PN-junction voltages at high temperatures are the lowest.
PN Junction Characteristics
The following table gives the PN-junction voltage current dependence for 125
oC,
different pin classes.
Adding 3.3 V to the absolute values from the table above gives the stressing voltage:
Table 40
PN-Junction Characteristics
Class
-0.2 mA
-0.5 mA
-1 mA
-3 mA
LVDS / Digital Input
-0.31 V
-0.35 V
-0.4 V
-0.48 V
FADC
-0.31 V
-0.39 V
-0.4 V
-0.48 V
A1
-0.52 V
-0.61 V
-0.66 V
-0.73 V
A2
-0.29 V
-0.34 V
-0.38 V
-0.46 V
Table 41
Equivalent stressing voltage (3.3 V - U
PN)
Class
-0.2 mA
-0.5 mA
-1 mA
-3 mA
LVDS / Digital Input
3.61 V
3.65 V
3.7 V
3.78 V
FADC
3.91 V
3.96 V
4.0 V
4.05 V
A1
3.82 V
3.91 V
3.96 V
4.03 V
A2
3.59 V
3.64 V
3.68 V
3.76 V
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