
Electrical Specifications
MC68HC08GZ32 Data Sheet, Rev. 3
294
Freescale Semiconductor
21.3 Functional Operating Range
21.4 Thermal Characteristics
Characteristic
Symbol
Value
Unit
Operating temperature range
TA
–40 to +125
°C
Operating voltage range
VDD
5.0
±10%
3.3
±10%
V
Characteristic
Symbol
Value
Unit
Thermal resistance
32-pin LQFP
48-pin LQFP
64-pin QFP
θ
JA
95
64
°C/W
I/O pin power dissipation
PI/O
User determined
W
Power dissipation(1)
1. Power dissipation is a function of temperature.
PD
PD = (IDD × VDD) + PI/O =
K/(TJ + 273 °C)
W
Constant(2)
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.
K
PD × (TA + 273 °C)
+ PD
2
× θ
JA
W/
°C
Average junction temperature
TJ
TA + (PD × θJA)
°C