MC68HC908GP20 Datasheet, PDF (379/406 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

23.4 Functional Operating Range
Characteristic
Symbol
Value
Unit
Operating temperature range
T_A
Operating voltage range
V_DD
–40 to +85
°C
3.0 ±10%
5.0 ±10%
V
23.5 Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
PDIP (40-pin)
QFP (44-pin)
θ_JA
60
°C/W
95
I/O pin power dissipation
P_I/O
User-Determined
W
Power dissipation⁽¹⁾
Constant⁽²⁾
Average junction temperature
Maximum junction temperature
P_D = (I_DD × V_DD) + P_I/O
P_D
=
W
K/(T_J + 273 °C)
K
P_J
x
+
(PT_DA2+_×2_θ7_J3_A
°C)
W/°C
T_J
T_A + (P_D × θ_JA)
°C
T_JM
125
°C
Notes:
1. Power dissipation is a function of temperature.
2. K is a 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.
MC68HC908GP20 — Rev 2.1
Freescale Semiconductor
Advance Information
379