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參數(shù)資料
| 型號： | MPC8349EVVAJDA |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 533 MHz, MICROPROCESSOR, PBGA672 |
| 封裝： | 35 X 35 MM, 1.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, TBGA-672 |
| 文件頁數(shù)： | 111/112頁 |
| 文件大?。?/td> | 1295K |
| 代理商： | MPC8349EVVAJDA |
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MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 2
98
Freescale Semiconductor
Thermal
20.2.1
Estimation of Junction Temperature with Junction-to-Ambient
Thermal Resistance
An estimation of the chip junction temperature, TJ, can be obtained from the equation:
TJ = TA + (RθJA × PD)
where:
TJ = junction temperature (°C)
TA = ambient temperature for the package (°C)
RθJA = junction to ambient thermal resistance (°C/W)
PD = power dissipation in the package (W)
The junction to ambient thermal resistance is an industry-standard value that provides a quick and easy
estimation of thermal performance. Generally, the value obtained on a single layer board is appropriate for
a tightly packed printed circuit board. The value obtained on the board with the internal planes is usually
appropriate if the board has low power dissipation and the components are well separated. Test cases have
demonstrated that errors of a factor of two (in the quantity TJ - TA) are possible.
20.2.2
Estimation of Junction Temperature with Junction-to-Board
Thermal Resistance
The thermal performance of a device cannot be adequately predicted from the junction to ambient thermal
resistance. The thermal performance of any component is strongly dependent on the power dissipation of
surrounding components. In addition, the ambient temperature varies widely within the application. For
many natural convection and especially closed box applications, the board temperature at the perimeter
(edge) of the package is approximately the same as the local air temperature near the device. Specifying
the local ambient conditions explicitly as the board temperature provides a more precise description of the
local ambient conditions that determine the temperature of the device.
At a known board temperature, the junction temperature is estimated using the following equation:
TJ = TA + (RθJA × PD)
where:
TA = ambient temperature for the package (°C)
RθJA = junction to ambient thermal resistance (°C/W)
PD = power dissipation in the package (W)
When the heat loss from the package case to the air can be ignored, acceptable predictions of junction
temperature can be made. The application board should be similar to the thermal test condition: the
component is soldered to a board with internal planes.
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參數(shù)描述 |
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| MPC8349EVVAJDB | 功能描述:微處理器 - MPU 8349 TBGA NO PB W/ ENC 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 |
| MPC8349EVVAJF | 功能描述:IC MPU PWRQUICC II PRO 672-TBGA RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:MPC83xx 標(biāo)準(zhǔn)包裝:1 系列:MPC85xx 處理器類型:32-位 MPC85xx PowerQUICC III 特點:- 速度:1.2GHz 電壓:1.1V 安裝類型:表面貼裝 封裝/外殼:783-BBGA，F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:783-FCPBGA（29x29） 包裝:托盤 |
| MPC8349EVVAJFB | 功能描述:微處理器 - MPU 8349 TBGA NO PB W/ ENC 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 |
| MPC8349EVVALDB | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Integrated Host Processor Hardware Specifications |
| MPC8349EVVALFB | 功能描述:微處理器 - MPU 8349 TBGA NO PB W/ ENC 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 |
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