MC908JL3ECPE Datasheet, PDF (136/180 Pages) Freescale Semiconductor, Inc – Microcontrollers

Electrical Specifications
16.3 Functional Operating Range
Table 16-2. Operating Range
Characteristic
Operating temperature range
Operating voltage range
Symbol
Value
Unit
T_A
– 40 to +125
– 40 to +85
°C
V_DD
5 ±10%
3 ±10%
V
16.4 Thermal Characteristics
Table 16-3. Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
20-pin PDIP
20-pin SOIC
28-pin PDIP
28-pin SOIC
48-pin LQFP
70
°C/W
θ_JA
70
°C/W
70
°C/W
70
°C/W
80
°C/W
I/O pin power dissipation
Power dissipation⁽¹⁾
Constant⁽²⁾
Average junction temperature
P_I/O
User determined
W
P_D
P_D = (I_DD × V_DD) + P_I/O =
K/(T_J + 273 °C)
W
K
P_D x (T_A + 273 °C)
+ P_D2 × θ_JA
W/°C
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.
MC68HC908JL3E Family Data Sheet, Rev. 4
136
Freescale Semiconductor