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| GD82541PI Datasheet, PDF (35/46 Pages) Intel Corporation – 82541 Family of Gigabit Ethernet Controllers | |||
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Networking Silicon â 82541(PI/GI/EI)
5.2
Thermal Specifications
The 82541(PI/GI/EI) device is specified for operation when the ambient temperature (TA) is within
the range of 0° C to 70° C.
TC (case temperature) is calculated using the equation:
TC = TA + P (θJA - θJC)
TJ (junction temperature) is calculated using the equation:
TJ = TA + P θJA
P (power consumption) is calculated by using the typical ICC, as indicated in Table 7 of Section 4.0,
and nominal VCC. The preliminary thermal resistances are shown in Table 13.
Table 13. Thermal Characteristics
Symbol
Parameter
θJA
Thermal resistance, junction-to-ambient
θJC
Thermal resistance, junction-to-case
Preliminary Value at specified
airflow (m/s)
0
1
2
29
25.0
23.5
11.1
11.1
11.1
Units
C/Watt
C/Watt
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 82541(PI/GI/EI) device is operating under recommended conditions.
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