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| MC68HC908RK2 Datasheet, PDF (148/158 Pages) Motorola, Inc – Microcontroller Unit | |||
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Electrical Specifications
13.3 Functional Operating Range
Characteristic
Operating temperature range(1)
Operating voltage range
1. Extended temperature range to be determined
Symbol
TA
VDD
Min
Max
Unit
â40
85
°C
1.8
3.6
V
13.4 Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
SSOP (20 pin)
SOIC (20 pin)
θJA
177
°C/W
88
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
100
°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.
MC68HC908RK2 Data Sheet, Rev. 5.1
148
Freescale Semiconductor
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