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MC9S12P128_10 Datasheet, PDF (505/566 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers | |||
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Electrical Characteristics
Table A-4. Operating Conditions
Oscillator
fosc
4
â
16
MHz
Bus frequency
fbus
0.5
â
32
MHz
Temperature Option C
Operating junction temperature range
Operating ambient temperature range(1)
°C
TJ
â40
â
105
TA
â40
27
85
Temperature Option V
Operating junction temperature range
Operating ambient temperature range1
°C
TJ
â40
â
125
TA
â40
27
105
Temperature Option M
°C
Operating junction temperature range
Operating ambient temperature range1
TJ
â40
â
150
TA
â40
27
125
1. Please refer to Section A.1.8, âPower Dissipation and Thermal Characteristicsâ for more details about the relation between
ambient temperature TA and device junction temperature TJ.
NOTE
Operation is guaranteed when powering down until low voltage reset
assertion.
A.1.8 Power Dissipation and Thermal Characteristics
Power dissipation and thermal characteristics are closely related. The user must assure that the maximum
operating junction temperature is not exceeded. The average chip-junction temperature (TJ) in °C can be
obtained from:
TJ = TA + (PD ⢠ÎJA)
TJ = Junction Temperature, [°C ]
TA = Ambient Temperature, [°C ]
PD = Total Chip Power Dissipation, [W]
ÎJA = Package Thermal Resistance, [°C/W]
The total power dissipation can be calculated from:
PD = PINT + PIO
PINT = Chip Internal Power Dissipation, [W]
â PIO = i RDSON â
IIOi2
S12P-Family Reference Manual, Rev. 1.13
Freescale Semiconductor
505
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