MC908AS60ACFU Datasheet, PDF (366/414 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Electrical Specifications
28.1.2 Functional Operating Range
Rating
Operating Temperature Range⁽¹⁾
Operating Voltage Range
1. T_A(MAX) = 125°C for part suffix MFU/MFN
T_A(MAX) = 105°C for part suffix VFU/VFN
T_A(MAX) = 85°C for part suffix CFU/CFN
Symbol
T_A
V_DD
Value
–40 to T_A(MAX)
5.0 ± 0.5
Unit
°C
V
NOTE
For applications which use the LVI, Freescale guarantees the functionality
of the device down to the LVI trip point (V_LVI) within the constraints outlined
in Chapter 16 Low-Voltage Inhibit (LVI).
28.1.3 Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal Resistance
QFP (64 Pins)
θ_JA
70
°C/W
Thermal Resistance
PLCC (52 Pins)
θ_JA
50
°C/W
I/O Pin Power Dissipation
P_I/O
User Determined
W
Power Dissipation (see Note 1)
P_D
P_D = (I_DD x V_DD) + P_I/O =
K/(T_J + 273 °C)
W
Constant (see Note 2)
K
P_D x (T_A + 273 °C)
+ (P_D2 x θ_JA)
W/°C
Average Junction Temperature
T_J
T_A + P_D x θ_JA
°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.
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
366
Freescale Semiconductor