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MPC8533E Fiches technique(PDF) 99 Page - Freescale Semiconductor, Inc

No de pièce MPC8533E
Description  Integrated Processor Hardware Specifications
PDF  112 Pages
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Fabricant  FREESCALE [Freescale Semiconductor, Inc]
Site Internet  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC8533E Fiches technique(HTML) 99 Page - Freescale Semiconductor, Inc

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MPC8533E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4
Freescale Semiconductor
99
Thermal
Figure 60. Approach Air Velocity (m/s)
20.3.4
Temperature Diode
The MPC8533E has a temperature diode on the microprocessor that can be used in conjunction with other
system temperature monitoring devices (such as Analog Devices, ADT7461™). These devices use the
negative temperature coefficient of a diode operated at a constant current to determine the temperature of
the microprocessor and its environment. It is recommended that each device be individually calibrated.
The following are voltage forward biased range of the on-board temperature diode:
Vf > 0.40 V
Vf < 0.90 V
An approximate value of the ideality may be obtained by calibrating the device near the expected operating
temperature. The ideality factor is defined as the deviation from the ideal diode equation:
Another useful equation is:
1
3
5
7
8
00.511.522.533.5
Thermalloy #2328B Pin-fin Heat Sink
(25
× 28 × 15 mm)
2
4
6
Ifw = Is e
qVf
nKT – 1
IH
IL
VH – VL = n
ln
KT
q



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