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82546EB bảng dữ liệu(PDF) 39 Page - Intel Corporation

tên linh kiện 82546EB
Giải thích chi tiết về linh kiện  Dual Port Gigabit Ethernet Controller
PDF  47 Pages
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nhà sản xuất  INTEL [Intel Corporation]
Trang chủ  http://www.intel.com
Logo INTEL - Intel Corporation

82546EB bảng dữ liệu(HTML) 39 Page - Intel Corporation

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Networking Silicon — 82546EB
Datasheet
33
5.3
Thermal Specifications
The 82546EB device is specified for operation when the ambient temperature (TA) is within the
range of 0 C to 55 C. The maximum permitted junction temperature is 120 C.
TC (case temperature) is calculated using the equation:
TC = TA + P (qJA - q JC)
TJ (junction temperature) is calculated using the equation:
TJ = TA + P qJA
The power consumption (P) is calculated by using the typical ICC and nominal VCC. The thermal
resistances are shown in Table 21.
Thermal resistances are determined empirically with test devices mounted on standard thermal test
boards. Real system designs may have different characteristics due to board thickness, arrangement
of ground planes, and proximity of other components. The case temperature measurements should
be used to assure that the 82546EB device is operating under recommended conditions.
Table 21. Thermal Characteristics
Symbol
Parameter
Value at specified airflow (m/s)
Units
01
23
qJA
Thermal resistance, junction-to-
ambient
17.7
15.6
14.8
14.0
C/Watt
qJC
Thermal resistance, junction-to-
case
6.8
6.8
6.8
6.8
C/Watt



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