MPC8533E datasheet(99/112 Pages) FREESCALE

部品番号	MPC8533E

部品情報	Integrated Processor Hardware Specifications

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MPC8533E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 4

Freescale Semiconductor

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:

00.511.522.533.5

Thermalloy #2328B Pin-fin Heat Sink

(25

× 28 × 15 mm)

Ifw = Is e

qVf

nKT – 1

VH – VL = n

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