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MC68HC912DG128 Datasheet, PDF (386/452 Pages) Motorola, Inc – Microcontrollers
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Freescale Semiconductor, Inc.
Electrical Specifications
19.3 Tables of Data
Table 19-1. Maximum Ratings(1)
Rating
Symbol
Value
Unit
Supply voltage
VDD, VDDA, VDDX
−0.3 to +6.5
V
Input voltage
VIN
−0.3 to +6.5
V
Operating temperature range
68HC912DG128PV8
68HC912DG128CPV8
68HC912DG128VPV8
68HC912DG128MPV8
TL to TH
0 to +70
TA
−40 to +85
°C
−40 to +105
−40 to +125
Storage temperature range
Tstg
−55 to +150
°C
Current drain per pin(2)
Excluding VDD and VSS
IIN
±25
mA
VDD differential voltage
VDD−VDDX
6.5
V
1. Permanent damage can occur if maximum ratings are exceeded. Exposures to voltages or currents in excess of recommend-
ed values affects device reliability. Device modules may not operate normally while being exposed to electrical extremes.
2. One pin at a time, observing maximum power dissipation limits. Internal circuitry protects the inputs against damage
caused by high static voltages or electric fields; however, normal precautions are necessary to avoid application of any
voltage higher than maximum-rated voltages to this high-impedance circuit. Extended operation at the maximum ratings
can adversely affect device reliability. Tying unused inputs to an appropriate logic voltage level (either GND or VDD) en-
hances reliability of operation.
Table 19-2. Thermal Characteristics
Characteristic
Symbol
Value
Unit
Average junction temperature
TJ
TA + (PD × ΘJA)
°C
Ambient temperature
TA
User-determined
°C
Package thermal resistance (junction-to-ambient)
112-pin quad flat pack (QFP)
ΘJA
40
°C/W
Total power dissipation(1)
PINT + PI/O or
PD
T----J---+-----K2---7---3---°--C--
W
Device internal power dissipation
PINT
IDD × VDD
W
I/O pin power dissipation(2)
PI/O
User-determined
W
A constant(3)
K
PD × (TA + 273°C) + ΘJA × PD2
W · °C
1. This is an approximate value, neglecting PI/O.
2. For most applications PI/O « PINT and can be neglected.
3. K is a constant pertaining to the device. Solve for K with a known TA and a measured PD (at equilibrium). Use this value of
K to solve for PD and TJ iteratively for any value of TA.
Technical Data
386
MC68HC912DG128 — Rev 3.0
Electrical Specifications
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