Datasheet

Electrical Specifications
MC68HC908GR16 Data Sheet, Rev. 5.0
254 Freescale Semiconductor
20.3 Functional Operating Range
20.4 Thermal Characteristics
Characteristic Symbol Value Unit
Operating temperature range
T
A
–40 to +125 °C
Operating voltage range
V
DD
5.0 ±10%
3.3 ±10%
V
Characteristic Symbol Value Unit
Thermal resistance
32-pin LQFP
48-pin LQFP
θ
JA
95
95
°C/W
I/O pin power dissipation
P
I/O
User determined W
Power dissipation
(1)
1. Power dissipation is a function of temperature.
P
D
P
D
= (I
DD
× V
DD
) + P
I/O
=
K/(T
J
+ 273 °C)
W
Constant
(2)
2. K is a constant unique to the device. K can be determined for a known T
A
and measured P
D
. With this value of K, P
D
and
T
J
can be determined for any value of T
A
.
K
P
D
× (T
A
+ 273 °C)
+ P
D
2
× θ
JA
W/°C
Average junction temperature
T
J
T
A
+ (P
D
× θ
JA
)
°C
Maximum junction temperature
T
JM
125 °C