参数资料
型号: KMPC8255ACZUMHBB
厂商: Freescale Semiconductor
文件页数: 4/50页
文件大小: 0K
描述: IC MPU PWRQUICC II HIP3 480-TBGA
标准包装: 2
系列: MPC82xx
处理器类型: 32-位 MPC82xx PowerQUICC II
速度: 266MHz
电压: 2V
安装类型: 表面贴装
封装/外壳: 480-LBGA
供应商设备封装: 408-TBGA(37.5x37.5)
包装: 托盘
MPC8260A PowerQUICC II Integrated Communications Processor Hardware Specifications, Rev. 2.0
12
Freescale Semiconductor
Electrical and Thermal Characteristics
2.2
Thermal Characteristics
Table 4 describes thermal characteristics.
2.3
Power Considerations
The average chip-junction temperature, TJ, in °C can be obtained from the following:
TJ = TA + (PD x θJA)
(1)
where
TA = ambient temperature °C
θ
JA = package thermal resistance, junction to ambient, °C/W
PD = PINT + PI/O
PINT = IDD x VDD Watts (chip internal power)
PI/O = power dissipation on input and output pins (determined by user)
For most applications PI/O < 0.3 x PINT. If PI/O is neglected, an approximate relationship between PD and
TJ is the following:
PD = K/(TJ + 273° C)
(2)
Solving equations (1) and (2) for K gives:
K = PD x (TA + 273° C) + θJA x PD
2
(3)
2 The leakage current is measured for nominal VDD, VCCSYN, and VDD.
3 MPC8265 and MPC8266 only.
Table 4. Thermal Characteristics for 480 TBGA Package
Characteristics
Symbol
Value
Unit
Air Flow
Junction to ambient
θJA
131
1 Assumes a single layer board with no thermal vias
°C/W
NC2
2 Natural convection
1 m/s
113
3 Assumes a four layer board
NC
83
1 m/s
Junction to board4
4 Thermal resistance between the die and the printed circuit board per JEDEC JESD51-8. Board temperature is
measured on the top surface of the board near the package.
θJB
4
°C/W
Junction to case5
5 Thermal resistance between the die and the case top surface as measured by the cold plate method (MIL
SPEC-883 Method 1012.1).
θJC
1.1
°C/W
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KMPC8260ACVVMIBB 功能描述:微处理器 - MPU PQ II HIP4 NO-PB REV B RoHS:否 制造商:Atmel 处理器系列:SAMA5D31 核心:ARM Cortex A5 数据总线宽度:32 bit 最大时钟频率:536 MHz 程序存储器大小:32 KB 数据 RAM 大小:128 KB 接口类型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作电源电压:1.8 V to 3.3 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:FBGA-324
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