MC68HC908JW32_09 Datasheet, PDF (212/232 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Electrical Specifications
19.3 Functional Operating Range
Table 19-2. Operating Range
Characteristic
Operating temperature range
Operating voltage range
Symbol
Value
Unit
T_A
0 to +70
°C
V_DD
3.5 to 5.5
V
19.4 Thermal Characteristics
Table 19-3. Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
48-Pin QFN
48-Pin LQFP
52-Pin LQFP
θ_JA
84
80
°C/W
85
I/O pin power dissipation
P_I/O
User determined
W
Power dissipation⁽¹⁾
P_D
P_D = (I_DD × V_DD) + P_I/O =
K/(T_J + 273 °C)
W
Constant⁽²⁾
K
P_D x (T_A + 273 °C)
+ P_D2 × θ_JA
W/°C
Average junction temperature
T_J
T_A + (P_D × θ_JA)
°C
1. Power dissipation is a function of temperature.
2. K 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.
MC68HC908JW32 Data Sheet, Rev. 6
212
Freescale Semiconductor