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MC68HC908JK1 Datasheet, PDF (193/210 Pages) Motorola, Inc – MC68HC908JK1
18.4 Functional Operating Range
Electrical Specifications
Functional Operating Range
Table 18-2. Operating Range
Characteristic
Symbol
Value
Unit
Operating temperature range
TA
– 40 to +125 – 40 to +85 °C
Operating voltage range
VDD
5V ± 10%
3V ± 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
70
°C/W
θJA
70
°C/W
70
°C/W
70
°C/W
I/O pin power dissipation
PI/O
User determined
W
Power dissipation(1)
PD
PD = (IDD × VDD) + PI/O =
K/(TJ + 273 °C)
W
Constant(2)
K
PD x (TA + 273 °C)
+ PD2 × θJA
W/°C
Average junction temperature
TJ
TA + (PD × θJA)
°C
Maximum junction temperature
TJM
100
°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)C908JL3 — Rev. 1.0
MOTOROLA
Electrical Specifications
Technical Data
193