MC68HC908LJ24 Datasheet, PDF (437/464 Pages) Motorola, Inc – Microcontrollers

Electrical Specifications
Functional Operating Range
24.4 Functional Operating Range
Table 24-2. Functional Operating Range
Characteristic
Symbol
Value
Unit
Operating temperature range
T_A
– 40 to +85
°C
Operating voltage range
V_DD
3.3 ± 10%
5 ± 10%
V
24.5 Thermal Characteristics
Table 24-3. Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
64-pin LQFP
64-pin QFP
80-pin LQFP
θ_JA
80-pin QFP
72
67
85
°C/W
75
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
Notes:
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.
MC68HC908LJ24/LK24 — Rev. 2.1
Freescale Semiconductor
Electrical Specifications
Data Sheet
437