- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45249 > MC7455ARX733LF (FREESCALE SEMICONDUCTOR INC) 32-BIT, 733 MHz, RISC PROCESSOR, CBGA483 PDF資料下載
參數(shù)資料
| 型號(hào)： | MC7455ARX733LF |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 733 MHz, RISC PROCESSOR, CBGA483 |
| 封裝： | 29 X 29 MM, 1.27 MM PITCH, CERAMIC, BGA-483 |
| 文件頁數(shù)： | 54/68頁 |
| 文件大?。?/td> | 1609K |
| 代理商： | MC7455ARX733LF |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁當(dāng)前第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁
58
MPC7455 RISC Microprocessor Hardware Specifications
MOTOROLA
System Design Information
Dow-Corning Corporation
800-248-2481
Dow-Corning Electronic Materials
2200 W. Salzburg Rd.
Midland, MI 48686-0997
Internet: www.dow.com
Shin-Etsu MicroSi, Inc.
888-642-7674
10028 S. 51st St.
Phoenix, AZ 85044
Internet: www.microsi.com
Thermagon Inc.
888-246-9050
4707 Detroit Ave.
Cleveland, OH 44102
Internet: www.thermagon.com
The following section provides a heat sink selection example using one of the commercially available heat
sinks.
1.9.8.3
Heat Sink Selection Example
For preliminary heat sink sizing, the die-junction temperature can be expressed as follows:
Tj = Ta + Tr + (RθJC + Rθint + Rθsa) × Pd
where:
Tj is the die-junction temperature
Ta is the inlet cabinet ambient temperature
Tr is the air temperature rise within the computer cabinet
RθJC is the junction-to-case thermal resistance
Rθint is the adhesive or interface material thermal resistance
Rθsa is the heat sink base-to-ambient thermal resistance
Pd is the power dissipated by the device
During operation, the die-junction temperatures (Tj) should be maintained less than the value specified in
Table 4. The temperature of air cooling the component greatly depends on the ambient inlet air temperature
and the air temperature rise within the electronic cabinet. An electronic cabinet inlet-air temperature (Ta)
may range from 30° to 40°C. The air temperature rise within a cabinet (Tr) may be in the range of 5° to 10°C.
The thermal resistance of the thermal interface material (Rθint) is typically about 1.5°C/W. For example,
assuming a Ta of 30°C, a Tr of 5°C, a CBGA package RθJC = 0.1, and a typical power consumption (Pd) of
15.0 W, the following expression for Tj is obtained:
Die-junction temperature:
Tj = 30°C + 5°C + (0.1°C/W + 1.5°C/W + Rθsa) × 15 W
For this example, a Rθsa value of 3.1°C/W or less is required to maintain the die-junction temperature below
the maximum value of Table 4.
Though the die junction-to-ambient and the heat sink-to-ambient thermal resistances are a common
figure-of-merit used for comparing the thermal performance of various microelectronic packaging
technologies, one should exercise caution when only using this metric in determining thermal management
because no single parameter can adequately describe three-dimensional heat flow. The final die-junction
operating temperature is not only a function of the component-level thermal resistance, but the system-level
design and its operating conditions. In addition to the component's power consumption, a number of factors
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MC7455ARX933LF | 32-BIT, 933 MHz, RISC PROCESSOR, CBGA483 |
| MC7455ARX867LG | 32-BIT, 867 MHz, RISC PROCESSOR, CBGA483 |
| MC7455ARX1000LF | 32-BIT, 1000 MHz, RISC PROCESSOR, CBGA483 |
| MC7445ARX933LG | 32-BIT, 933 MHz, RISC PROCESSOR, CBGA360 |
| MC7445ARX867LF | 32-BIT, 867 MHz, RISC PROCESSOR, CBGA360 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC7455ARX733LG | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RISC Microprocessor Hardware Specifications |
| MC7455ARX867LF | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RISC Microprocessor Hardware Specifications |
| MC7455ARX867LG | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RISC Microprocessor Hardware Specifications |
| MC7455ARX933LF | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RISC Microprocessor Hardware Specifications |
| MC7455ARX933LG | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RISC Microprocessor Hardware Specifications |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。