MC68HC908LD64 Datasheet, PDF (345/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

Electrical Specifications
Functional Operating Range
24.4 Functional Operating Range
Table 24-2. Operating Range
Characteristic
Symbol
Value
Unit
Operating temperature range
T_A
Operating voltage range
V_DD
0 to +85
°C
3.0 to 3.6
V
24.5 Thermal Characteristics
Table 24-3. Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
QFP (64 pins)
θ_JA
70
°C/W
I/O pin power dissipation
Power dissipation⁽¹⁾
Constant⁽²⁾
P_I/O
User determined
W
P_D
P_D = (I_DD x V_DD) + P_I/O =
K/(T_J + 273 °C)
W
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
Maximum junction temperature
T_JM
100
°C
Notes:
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.
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor
Electrical Specifications
Data Sheet
345