MC908JL8CDWE Datasheet, PDF (186/212 Pages) Freescale Semiconductor, Inc – Microcontrollers

Electrical Specifications
17.3 Functional Operating Range
Table 17-2. Operating Range
Characteristic
Operating temperature range
Operating voltage range
Symbol
T_A
V_DD
Value
– 40 to +125
– 40 to +85
—
5 ±10%
3 ±10%
5 ±10%
Unit
°C
V
17.4 Thermal Characteristics
Table 17-3. Thermal Characteristics
Characteristic
Thermal resistance
20-pin PDIP
20-pin SOIC
28-pin PDIP
28-pin SOIC
32-pin SDIP
32-pin LQFP
I/O pin power dissipation
Power dissipation⁽¹⁾
Constant⁽²⁾
Average junction temperature
Symbol
θ_JA
P_I/O
P_D
K
T_J
Value
70
70
70
70
70
95
User determined
P_D = (I_DD × V_DD) + P_I/O =
K/(T_J + 273 °C)
P_D x (T_A + 273 °C)
+ P_D2 × θ_JA
T_A + (P_D × θ_JA)
Unit
°C/W
W
W
W/°C
°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.
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
186
Freescale Semiconductor