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MPC8533EVJALGA Datasheet(PDF) 99 Page - NXP Semiconductors |
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MPC8533EVJALGA Datasheet(HTML) 99 Page - NXP Semiconductors |
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99 / 112 page  MPC8533E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 8 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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