參數(shù)資料
型號: MC9S08QE32CFT
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, QCC48
封裝: 7 X 7 MM, 1 MM HEIGHT, ROHS COMPLIANT, MO-220VKKD-2, QFN-48
文件頁數(shù): 3/46頁
文件大小: 985K
代理商: MC9S08QE32CFT
Electrical Characteristics
MC9S08QE32 Series MCU Data Sheet, Rev. 6
Freescale Semiconductor
11
The average chip-junction temperature (TJ) in °C can be obtained from:
TJ = TA + (PD × θJA)
Eqn. 1
where:
TA = Ambient temperature, °C
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)
Eqn. 2
Solving Equation 1 and Equation 2 for K gives:
K = PD × (TA + 273°C) + θJA × (PD)
2
Eqn. 3
where K is a constant pertaining to the particular part. K can be determined from equation 3 by measuring
PD (at equilibrium) for a known TA. Using this value of K, the values of PD and TJ can be obtained by
solving Equation 1 and Equation 2 iteratively for any value of TA.
Table 4. Thermal Characteristics
Rating
Symbol
Value
Unit
Operating temperature range
(packaged)
TA
TL to TH
–40 to 85
°C
Maximum junction temperature
TJM
95
°C
Thermal resistance
Single-layer board
48-pin QFN
θ
JA
81
°C/W
44-pin LQFP
68
32-pin LQFP
66
28-pin SOIC
57
Thermal resistance
Four-layer board
48-pin QFN
θ
JA
26
°C/W
44-pin LQFP
46
32-pin LQFP
54
28-pin SOIC
42
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相關代理商/技術參數(shù)
參數(shù)描述
MC9S08QE32CFT 制造商:Freescale Semiconductor 功能描述:IC 8BIT MCU HC08 50MHZ QFN-48
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MC9S08QE32CLCR 功能描述:8位微控制器 -MCU 9S08QE32-C&I-32LQFP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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