參數(shù)資料
型號: MC68HC05C9AFN
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數(shù): 29/162頁
文件大小: 1093K
代理商: MC68HC05C9AFN
N
O
N-D
I
SC
L
O
SU
R
E
AG
R
EEMENT
R
E
Q
U
IR
ED
Electrical Specifications
Advance Information
MC68HC05C9A Rev. 5.0
124
Electrical Specifications
MOTOROLA
12.5 Power Considerations
The average chip-junction temperature, TJ, in °C, can be obtained from:
TJ = TA + (PD × θJA)
(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.
The following is an approximate relationship between PD and TJ
(neglecting PJ):
PD = K ÷ (TJ + 273°C)
(2)
Solving equations (1) and (2) for K gives:
K = PD × (TA + 273°C) + θJA × (PD)
2
(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 equations (1) and (2) iteratively for any value of TA.
相關PDF資料
PDF描述
MC68HSC05C9ACB 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PDIP42
MC68HSC05C9AFB 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PQFP44
MC68HCL05C9AFN 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
MC68HSC05C9AP 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PDIP40
MC68HSC05C9ACP 8-BIT, MROM, 4.1 MHz, MICROCONTROLLER, PDIP40
相關代理商/技術參數(shù)
參數(shù)描述
MC68HC05C9AMB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9AMFB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9AMFN 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9AMP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05C9AP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers