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參數(shù)資料
| 型號： | MPC8245ARVV400D |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 400 MHz, RISC PROCESSOR, PBGA352 |
| 封裝： | 35 X 35 MM, 1.65 MM HEIGHT, 1.27 MM PITCH, LEAD FREE, TBGA-352 |
| 文件頁數(shù)： | 50/68頁 |
| 文件大?。?/td> | 1143K |
| 代理商： | MPC8245ARVV400D |
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MPC8245 Integrated Processor Hardware Specifications, Rev. 9
54
Freescale Semiconductor
System Design
7.8.2
Adhesives and Thermal Interface Materials
A thermal interface material placed between the top of the package and the bottom of the heat sink
minimizes thermal contact resistance. For applications that attach the heat sink by a spring clip
mechanism, Figure 32 shows the thermal performance of three thin-sheet thermal-interface materials
(silicone, graphite/oil, floroether oil), a bare joint, and a joint with thermal grease as a function of contact
pressure. As shown, the performance of these thermal interface materials improves with increasing contact
pressure. Thermal grease significantly reduces the interface thermal resistance. That is, the bare joint offers
a thermal resistance approximately seven times greater than the thermal grease joint.
A spring clip attaches heat sinks to holes in the printed-circuit board (see Figure 32). Therefore, synthetic
grease offers the best thermal performance, considering the low interface pressure. The selection of any
thermal interface material depends on factors such as thermal performance requirements,
manufacturability, service temperature, dielectric properties, and cost.
Figure 32. Thermal Performance of Select Thermal Interface Material
The board designer can choose between several types of thermal interfaces. Heat sink adhesive materials
are selected on the basis of high conductivity and adequate mechanical strength to meet equipment
shock/vibration requirements. Several commercially-available thermal interfaces and adhesive materials
are provided by the following vendors:
Chomerics, Inc.
781-935-4850
77 Dragon Ct.
Woburn, MA 01888-4014
Internet: www.chomerics.com
0
0.5
1
1.5
2
0
1020
30
4050
607080
Silicone Sheet (0.006 in.)
Bare Joint
Floroether Oil Sheet (0.007 in.)
Graphite/Oil Sheet (0.005 in.)
Synthetic Grease
Contact Pressure (psi)
Spe
c
ific
Ther
mal
Resi
stan
ce
(K-in
.2
/W
)
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| MPC8245ARZU400D | 功能描述:微處理器 - MPU INTEGRATED HOST PROC RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324 |
| MPC8245ARZU400D | 制造商:Freescale Semiconductor 功能描述:IC 32BIT MPU 400MHZ BGA-352 |
| MPC8245ARZU466D | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Part Number Specification for the MPC8245ARZUnnnX Series |
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