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| MC908MR32CFUE Datasheet, PDF (266/282 Pages) Freescale Semiconductor, Inc – Microcontrollers | |||
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Electrical Specifications
19.3 Functional Operating Range
Characteristic
Operating temperature range(1)
MC68HC908MR24CFU
MC68HC908MR24VFU
Operating voltage range
1. See Freescale representative for temperature availability.
C = Extended temperature range (â40°C to +85°C)
V = Automotive temperature range (â40°C to +105°C)
Symbol
TA
VDD
Value
Unit
â40 to 85
°C
â40 to 105
5.0 ± 10%
V
19.4 Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance,
64-pin QFP
θJA
76
°C/W
I/O pin power dissipation
PI/O
User determined
W
Power dissipation(1)
PD
PD = (IDD x VDD) + PI/O =
K/(TJ + 273°C)
W
Constant(2)
K
PD x (TA + 273°C)
+ PD2 x θJA
W/°C
Average junction temperature
TJ
TA + (PD x θJA)
°C
Maximum junction temperature
TJM
125
°C
1. Power dissipation is a function of temperature.
2. K is a constant unique to the device. K can be determined for a known TA and measured PD. With this value of K, PD and
TJ can be determined for any value of TA.
MC68HC908MR32 ⢠MC68HC908MR16 Data Sheet, Rev. 6.1
266
Freescale Semiconductor
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