參數(shù)資料
型號(hào)： IBM25PPC740L-GB400A2T
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 400 MHz, RISC PROCESSOR, CBGA255
封裝： 21 X 21 MM, 1.27 MM PITCH, CERAMIC, BGA-255
文件頁(yè)數(shù)： 40/48頁(yè)
文件大?。?/td> 608K
代理商： IBM25PPC740L-GB400A2T
12/8/99
Version 1.02
Page 45
PowerPC 740 and PowerPC 750 Microprocessor
CMOS 0.20
m Copper Technology, PID-8p, PPC740L and PPC750L, dd3.2
Assuming an air velocity of 0.5m/s, we have an effective
θ
SA of 7
°C/W, thus
T
J = 30
°C + 5°C + (.03°C/W +1.0°C/W + 7°C/W) × 4.5W,
resulting in a junction temperature of approximately 71
°C which is well within the maximum operating temper-
ature of the component.
Other heat sinks offered by Chip Coolers, IERC, Thermalloy, Aavid, and Wakefield Engineering offer different
heat sink-to-ambient thermal resistances, and may or may not need air flow.
Though the 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 chip-junction operating tempera-
ture is not only a function of the component-level thermal resistance, but the system-level design and its oper-
ating conditions. In addition to the component's power dissipation, a number of factors affect the final
operating die-junction temperature. These factors might include air flow, board population (local heat flux of
adjacent components), heat sink efficiency, heat sink attach, next-level interconnect technology, system air
temperature rise, etc.
Figure 23. Thermalloy #2328B Pin-Fin Heat Sink-to-Ambient Thermal Resistance vs. Air ow Velocity
Approach Air Velocity (m/s)
Heat
Sink
Ther
mal
Resistance
(
×°
C/W)
1
2
3
4
5
6
7
8
0
0.5
1
1.5
2
2.5
3
3.5
Thermalloy #2328B Pin-n Heat Sink
(25 x 28 x 15 mm)
相關(guān)PDF資料
PDF描述
IBM25PPC750L-GB433A2R 32-BIT, 433 MHz, RISC PROCESSOR, CBGA360
IBM25PPC750L-GB350A2R 32-BIT, 350 MHz, RISC PROCESSOR, CBGA360
IBM25PPC750L-GB366A2R 32-BIT, 366 MHz, RISC PROCESSOR, CBGA360
IBM25PPC750L-GB375A2R 32-BIT, 375 MHz, RISC PROCESSOR, CBGA360
IBM25PPC750L-GB375A2T 32-BIT, 375 MHz, RISC PROCESSOR, CBGA360
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IBM25PPC740L-GB433A2R 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|BGA|255PIN|CERAMIC
IBM25PPC740LGB433A2T 制造商:IBM Microelectronics 功能描述:MPU PWRPC740 RISC 64BIT 0.2UM 433MHZ 1.8V/2.5V/3.3V 255CBGA - Trays 制造商:IBM 功能描述:IBM IBM25PPC740LGB433A2T Co-Processors
IBM25PPC740L-GB433A2T 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|BGA|255PIN|CERAMIC
IBM25PPC740L-GB466A2R 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|BGA|255PIN|CERAMIC
IBM25PPC740L-GB466A2T 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|BGA|255PIN|CERAMIC
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*