θJA = Package thermal resistance, junction-to-ambient, °C/W P
參數(shù)資料
型號: TWR-S08PT60
廠商: Freescale Semiconductor
文件頁數(shù): 10/37頁
文件大?。?/td> 0K
描述: TOWER SYSTEM MODULE S08PT60
標(biāo)準(zhǔn)包裝: 1
系列: S08
類型: MCU
適用于相關(guān)產(chǎn)品: Freescale 電源塔系統(tǒng)
所含物品: 板,線纜,DVD
θJA = 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 + 273 °C)
Solving the equations above for K gives:
K = PD × (TA + 273 °C) + θJA × (PD)2
where K is a constant pertaining to the particular part. K can be determined by measuring
PD (at equilibrium) for an known TA. Using this value of K, the values of PD and TJ can
be obtained by solving the above equations iteratively for any value of TA.
6 Peripheral operating requirements and behaviors
6.1 External oscillator (XOSC) and ICS characteristics
Table 9. XOSC and ICS specifications (temperature range = -40 to 105 °C ambient)
Num
C
Characteristic
Symbol
Min
Max
Unit
1
C
Oscillator
crystal or
resonator
Low range (RANGE = 0)
flo
32
40
kHz
C
High range (RANGE = 1)
FEE or FBE mode2
fhi
4
20
MHz
C
High range (RANGE = 1),
high gain (HGO = 1),
FBELP mode
fhi
4
20
MHz
C
High range (RANGE = 1),
low power (HGO = 0),
FBELP mode
fhi
4
20
MHz
2
D
Load capacitors
C1, C2
See Note3
Table continues on the next page...
Peripheral operating requirements and behaviors
MC9S08PT60 Series Data Sheet, Rev. 3, 4/2012.
18
Freescale Semiconductor, Inc.
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