MC908AP16CFAE Datasheet, PDF (300/324 Pages) Freescale Semiconductor, Inc – Table of Contents

Electrical Specifications
22.3 Functional Operating Range
Table 22-2. Operating Range
Characteristic
Symbol
Value
Unit
Operating temperature range
T_A
– 40 to +85
°C
Operating voltage range
V_DD
2.7 to 5.5
V
22.4 Thermal Characteristics
Table 22-3. Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
42-Pin SDIP
44-Pin QFP
θ_JA
48-Pin LQFP
60
°C/W
95
°C/W
80
°C/W
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
Maximum junction temperature
T_JM
100
°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.
MC68HC908AP Family Data Sheet, Rev. 4
298
Freescale Semiconductor