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MC908AZ32ACFUE Datasheet, PDF (298/324 Pages) Freescale Semiconductor, Inc – Microcontrollers
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Electrical Specifications
25.1.2 Functional Operating Range
Rating
Operating Temperature Range(1)
Operating Voltage Range
1. TA(MAX) = 125°C for part suffix MFU/MFN
TA(MAX) = 105°C for part suffix VFU/VFN
TA(MAX) = 85°C for part suffix CFU/CFN
Symbol
Value
Unit
TA
–40 to TA(MAX)
°C
VDD
5.0 ± 0.5
V
NOTE
For applications which use the LVI, Freescale guarantee the functionality of
the device down to the LVI trip point (VLVI) within the constraints outlined in
Chapter 14 Low Voltage Inhibit (LVI).
25.1.3 Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal Resistance
QFP (64 Pins)
θJA
70
°C/W
I/O Pin Power Dissipation
PI/O
User Determined
W
Power Dissipation(1)
PD
PD = (IDD x VDD) + PI/O =
K/(TJ + 273 °C)
W
Constant(2)
K
PD x (TA + 273 °C)
+ (PD2 x θJA)
W/°C
Average Junction Temperature
TJ
TA + PD x θJA
°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 TA and measured PD. With this value of K, PD and
TJ can be determined for any value of TA.
MC68HC908AZ32A Data Sheet, Rev. 2
298
Freescale Semiconductor
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