MC68HC908GT16_07 Datasheet, PDF (256/292 Pages) Freescale Semiconductor, Inc – Microcontrollers

Electrical Specifications
20.3 Functional Operating Range
Characteristic
Operating temperature range
Operating voltage range
Symbol
T_A
V_DD
Value
Unit
–40 to +85
°C
3.0 ±10%
5.0 ±10%
V
20.4 Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
42-pin SDIP
44-pin QFP
θ_JA
60
°C/W
95
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 × (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 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.
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
256
Freescale Semiconductor