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| MC68HC908JL3E Datasheet, PDF (199/226 Pages) Motorola, Inc – Microcontrollers | |||
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18.4 Functional Operating Range
Electrical Specifications
Functional Operating Range
Table 18-2. Operating Range
Characteristic
Symbol
Value
Unit
Operating temperature range
TA
â 40 to +125 â 40 to +85 °C
Operating voltage range
VDD
5 ±10%
3 ±10%
V
18.5 Thermal Characteristics
Table 18-3. Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
20-pin PDIP
20-pin SOIC
28-pin PDIP
28-pin SOIC
48-pin LQFP
70
°C/W
θJA
70
°C/W
70
°C/W
70
°C/W
80
°C/W
I/O pin power dissipation
PI/O
User determined
W
Power dissipation(1)
PD
PD = (IDD Ã VDD) + PI/O =
K/(TJ + 273 °C)
W
Constant(2)
K
PD x (TA + 273 °C)
+ PD2 à θJA
W/°C
Average junction temperature
TJ
TA + (PD à θJA)
°C
NOTES:
1. Power dissipation is a function of temperature.
2. K 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.
MC68H(R)C908JL3E/JK3E/JK1E â Rev. 2.0
MOTOROLA
Electrical Specifications
Technical Data
199
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