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550 参数 Datasheet PDF下载

550图片预览
型号: 550
PDF下载: 下载PDF文件 查看货源
内容描述: 奔腾4处理器,支持超线程技术 [Pentium 4 Processors Supporting Hyper-Threading Technology]
分类和应用:
文件页数/大小: 96 页 / 1585 K
品牌: INTEL [ INTEL ]
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Thermal Specifications and Design Considerations  
5.2.7  
Thermal Diode  
The processor incorporates an on-die thermal diode. A thermal sensor located on the system board  
may monitor the die temperature of the processor for thermal management/long term die  
temperature change purposes. Table 5-4 and Table 5-5 provide the diode parameter and interface  
specifications. This thermal diode is separate from the Thermal Monitor’s thermal sensor and  
cannot be used to predict the behavior of the Thermal Monitor.  
Table 5-4. Thermal Diode Parameters  
Symbol  
IFW  
Parameter  
Forward Bias Current  
Min  
Typ  
Max  
Unit  
Notes  
1
11  
187  
µA  
2, 3, 4, 5  
2, 3, 6  
n
RT  
Diode Ideality Factor  
Series Resistance  
1.0083  
3.242  
1.011  
3.33  
1.023  
3.594  
NOTES:  
1.  
2.  
3.  
4.  
Intel does not support or recommend operation of the thermal diode under reverse bias.  
Characterized at 75 °C.  
Not 100% tested. Specified by design characterization.  
The ideality factor, n, represents the deviation from ideal diode behavior as exemplified by the diode equation:  
IFW = IS * (e qV /nkT –1)  
D
where IS = saturation current, q = electronic charge, VD = voltage across the diode, k = Boltzmann  
Constant, and T = absolute temperature (Kelvin).  
5.  
6.  
Devices found to have an ideality factor of 1.0183 to 1.023 will create a temperature error approximately 2 C° higher than  
the actual temperature. To minimize any potential acoustic impact of this temperature error, T  
2 C° on these parts.  
will be increased by  
CONTROL  
The series resistance, R , is provided to allow for a more accurate measurement of the thermal diode temperature. R , as  
T
T
defined, includes the pins of the processor but does not include any socket resistance or board trace resistance between  
the socket and the external remote diode thermal sensor. RT can be used by remote diode thermal sensors with automatic  
series resistance cancellation to calibrate out this error term. Another application is that a temperature offset can be manu-  
ally calculated and programmed into an offset register in the remote diode thermal sensors as exemplified by the equation:  
Terror = [RT * (N-1) * IFWmin] / [nk/q * ln N]  
where Terror = sensor temperature error, N = sensor current ratio, k = Boltzmann Constant, q = electronic  
charge.  
Table 5-5. Thermal Diode Interface  
Signal Name  
Land Number  
Signal Description  
THERMDA  
THERMDC  
AL1  
AK1  
diode anode  
diode cathode  
§
Datasheet  
83  
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