參數(shù)資料
型號： MC68HC05E6MFB
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封裝： PLASTIC, QFP-44
文件頁數(shù)： 10/140頁
文件大?。?/td> 1584K
代理商： MC68HC05E6MFB
Electrical Specifications
Thermal characteristics and power considerations
MC68HC05E6 — Rev. 1.0
Electrical Specifications
Thermal characteristics and power considerations
The average chip junction temperature, TJ, in degrees Celcius can be
obtained from the following equation:
[1]
where:
TA = Ambient temperature (°C)
θ
JA = Package thermal resistance, junction-to-ambient (°C/W)
PD = PINT + PI/O (W)
PINT = Internal chip power = IDD VDD (W)
PI/O = Power dissipation on input and output pins (user determined)
An approximate relationship between PD and TJ (if PI/O is neglected) is:
[2]
Solving equations [1] and [2] for K gives:
[3]
where K is a constant for a particular part. K can be determined by
measuring PD (at equilibrium) for a known TA. Using this value of K, the
values of PD and TJ can be obtained for any value of TA by solving the
above equations. The package thermal characteristics are shown in
Table 20 Package thermal characteristics
Characteristics
Symbol
Value
Unit
Thermal resistance
– Plastic 44 pin QFP package
– Plastic 28 pin SOIC package
θ
JA
θ
JA
60
°C/W
T
J
T
A
P
D
θ
JA
()
+
=
P
D
K
T
J
273
+
---------------------
=
KP
D
T
A
273
+
()
θ
JA
P
D
2
+
=
Figure 29 Equivalent test load
VDD = 4.5 V
R2
R1
C
Test
point
Pins
R1
R2
C
PA0–7, PB0–7, PC0–7, PD0–7, PG0–3
3.26k
2.38k 50pF
3-elec
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關(guān)PDF資料
PDF描述
MC68HC05E6VDWR2 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC705E6MFB 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44
MC68HC705E6CFB 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44
MC68HC705E6VDWR2 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC05E6VFB 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05E6VDW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05E6VFB 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05F32 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:a member of the M68HC05 family of HCMOS
MC68HC05F32CFU 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:a member of the M68HC05 family of HCMOS
MC68HC05F32CPU 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:a member of the M68HC05 family of HCMOS
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