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| MC68HC08LT8 Datasheet, PDF (144/156 Pages) Freescale Semiconductor, Inc – Microcontrollers | |||
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Electrical Specifications
16.3 Functional Operating Range
Table 16-2. Operating Range
Characteristic
Symbol
Value
Unit
Operating temperature range
TA
(TL to TH)
â 40 to +85
°C
Operating voltage range
VDD
1.8 to 5.5(1)
V
LCD voltage
VLCD
VSS to VDD
V
1. For normal operation, user should ensure that the device supply voltage is above the LVI trip voltage.
16.4 Thermal Characteristics
Table 16-3. Thermal Characteristics
Characteristic
Symbol
Value
Unit
Thermal resistance
44-pin LQFP
θJA
85
°C/W
I/O pin power dissipation
PI/O
User determined
W
Power dissipation(1)
PD
PD = (IDD Ã VDD) + PI/O =
K/(TJ + 273 °C)
W
Constant(2)
K
PD x (TA + 273 °C)
+ PD2 à θJA
W/°C
Average junction temperature
TJ
TA + (PD à θJA)
°C
1. Power dissipation is a function of temperature.
2. K constant unique to the device. K can be determined for a known TA and measured PD. With this value of K, PD and TJ
can be determined for any value of TA.
MC68HC08LT8 Data Sheet, Rev. 1
144
Freescale Semiconductor
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