參數(shù)資料
型號(hào)： S9S08MP16E2VLF
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 50.33 MHz, MICROCONTROLLER, PQFP48
封裝： QFP-48
文件頁(yè)數(shù)： 2/36頁(yè)
文件大小： 762K
代理商： S9S08MP16E2VLF
MC9S08MP16 Series Data Sheet, Rev. 2
Electrical Characteristics
Freescale Semiconductor
10
2.4
Thermal Characteristics
This section provides information about operating temperature range, power dissipation, and package thermal resistance. Power
dissipation on I/O pins is usually small compared to the power dissipation in on-chip logic and voltage regulator circuits, and
it is user-determined rather than being controlled by the MCU design. To take PI/O into account in power calculations, determine
the difference between actual pin voltage and VSS or VDD and multiply by the pin current for each I/O pin. Except in cases of
unusually high pin current (heavy loads), the difference between pin voltage and VSS or VDD will be very small.
The average chip-junction temperature (TJ) in C can be obtained from:
TJ = TA + (PD JA)
Eqn. 1
where:
TA = Ambient temperature, C
JA = Package thermal resistance, junction-to-ambient, C/W
PD = Pint PI/O
Pint = IDD VDD, Watts — chip internal power
PI/O = Power dissipation on input and output pins — user determined
For most applications, PI/O Pint and can be neglected. An approximate relationship between PD and TJ (if PI/O is neglected)
is:
PD = K (TJ + 273C)
Eqn. 2
Solving Equation 1 and Equation 2 for K gives:
K = PD (TA + 273C) + JA (PD)
2
Eqn. 3
Table 4. Thermal Characteristics
Num
C
Rating
Symbol
Consumer &
Industrial
Automotive
Unit
1
—
Operating temperature range (packaged)
TA
–40 to 105
–40 to 125
C
2
D
Maximum junction temperature
TJ
115
135
C
3
D
Thermal resistance 1,2
single-layer board
1 Junction temperature is a function of die size, on-chip power dissipation, package thermal resistance, mounting site (board)
temperature, ambient temperature, air flow, power dissipation of other components on the board, and board thermal
resistance.
2 Junction-to-ambient natural convection
48-pin LQFP
JA
80
C/W
32-pin LQFP
85
—
28-pin SOIC
71
—
4
D
Thermal resistance 1,2
four-layer board
48-pin LQFP
JA
56
C/W
32-pin LQFP
57
—
28-pin SOIC
48
—
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參數(shù)描述
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S9S08QD2CSC 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCS08 Microcontrollers
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