Freescale Semiconductor, Inc.
Preliminary Electrical Specifications
Functional Operating Range
17.4 Functional Operating Range
Characteristic
Symbol
Min Max
Unit
°C
(1)
T
–40
1.8
85
Operating temperature range
A
V
Operating voltage range
3.6
V
DD
1. Extended temperature range to be determined
17.5 Thermal Characteristics
Characteristic
Thermal resistance
Symbol
Value
Unit
θ
SSOP (20 pin)
SOIC (20 pin)
177
88
°C/W
JA
P
I/O pin power dissipation
User determined
P = (I x V ) + P =
I/O
W
W
I/O
D
DD
DD
(1)
P
Power dissipation
D
K/(T + 273°C)
J
P x (T + 273°C)
D
A
(2)
K
W/°C
Constant
2
+ P x θ
D
JA
T
T + (P x θ )
Average junction temperature
Maximum junction temperature
°C
°C
J
A
D
JA
T
100
JM
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
D. With this value of K, PD and TJ can be determined for any value of TA.
P
MC68HC908RFRK2
MOTOROLA
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Preliminary Electrical Specifications
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