MC68HC08AS32 Datasheet, PDF (264/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

17.2 Functional Operating Range
Rating
Operating temperature range
Operating voltage range
Symbol
T_A
V_DD
Value
–40 to 125
5.0 ± 10%
Unit
°C
V
17.3 Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
PLCC (52 pins)
θ_JA
50
°C/W
I/O pin power dissipation
P_I/O
User determined
W
Power dissipation⁽¹⁾
P_D
P_D = (I_DD x V_DD) +
P_I/O = K/(T_J + 273°C)
W
Constant⁽²⁾
Average junction temperature
Maximum junction temperature
K
P_D x (T_A + 273°C)
+ (P_D2 x θ_JA)
W/°C
T_J
T_A = P_D × θ_JA
°C
T_JM
150
°C
1. Power dissipation is a function of temperature
2. K is a constant unique to the device. K can be determined from 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.
Data Sheet
264
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor