參數(shù)資料
型號(hào)： KMPC8271CVRTIEA
廠(chǎng)商： Freescale Semiconductor
文件頁(yè)數(shù)： 8/61頁(yè)
文件大小： 0K
描述： IC MPU PWRQUICC II 32BIT 516PBGA
標(biāo)準(zhǔn)包裝： 2
系列： MPC82xx
處理器類(lèi)型： 32-位 MPC82xx PowerQUICC II
速度： 400MHz
電壓： 1.5V
安裝類(lèi)型： 表面貼裝
封裝/外殼： 516-BBGA
供應(yīng)商設(shè)備封裝： 516-FPBGA（27x27）
包裝： 托盤(pán)
MPC8272 PowerQUICC II Family Hardware Specifications, Rev. 3
16
Freescale Semiconductor
Thermal Characteristics
4.4
Estimation Using Simulation
When the board temperature is not known, a thermal simulation of the application is needed. The simple
two-resistor model can be used with the thermal simulation of the application, or a more accurate and
complex model of the package can be used in the thermal simulation.
4.5
Experimental Determination
To determine the junction temperature of the device in the application after prototypes are available, the
thermal characterization parameter (
ΨJT) can be used to determine the junction temperature with a
measurement of the temperature at the top center of the package case using the following equation:
TJ = TT + (ΨJT × PD)
where:
Ψ
JT = thermal characterization parameter
TT = thermocouple temperature on top of package
PD = power dissipation in package
The thermal characterization parameter is measured per JEDEC JESD51-2 specification using a 40-gauge
type T thermocouple epoxied to the top center of the package case. The thermocouple should be positioned
so that the thermocouple junction rests on the package. A small amount of epoxy is placed over the
thermocouple junction and over 1 mm of wire extending from the junction. The thermocouple wire is
placed flat against the case to avoid measurement errors caused by cooling effects of the thermocouple
wire.
4.6
Layout Practices
Each VDD and VDDH pin should be provided with a low-impedance path to the board’s power supplies.
Each ground pin should likewise be provided with a low-impedance path to ground. The power supply pins
drive distinct groups of logic on chip. The VDD and VDDH power supplies should be bypassed to ground
using bypass capacitors located as close as possible to the four sides of the package. For filtering high
frequency noise, a capacitor of 0.1uF on each VDD and VDDH pin is recommended. Further, for medium
frequency noise, a total of 2 capacitors of 47uF for VDD and 2 capacitors of 47uF for VDDH are also
recommended. The capacitor leads and associated printed circuit traces connecting to chip VDD, VDDH
and ground should be kept to less than half an inch per capacitor lead. Boards should employ separate inner
layers for power and GND planes.
All output pins on the SoC have fast rise and fall times. Printed circuit (PC) trace interconnection length
should be minimized to minimize overdamped conditions and reflections caused by these fast output
switching times. This recommendation particularly applies to the address and data buses. Maximum PC
trace lengths of six inches are recommended. Capacitance calculations should consider all device loads as
well as parasitic capacitances due to the PC traces. Attention to proper PCB layout and bypassing becomes
especially critical in systems with higher capacitive loads because these loads create higher transient
currents in the VDD and GND circuits. Pull up all unused inputs or signals that will be inputs during reset.
Special care should be taken to minimize the noise levels on the PLL supply pins.
相關(guān)PDF資料
PDF描述
HMM44DREI CONN EDGECARD 88POS .156 EYELET
ASM36DRES CONN EDGECARD 72POS .156 EYELET
1734248-7 CONN FPC/ZIF 7POS 1MM VERT SMD
XF2J-122412A CONN FPC 12POS 0.5MM SMT
XC4025E-4PG223I IC FPGA I-TEMP 5V 4 SPD 223-CPGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
KMPC8271CZQTIEA 功能描述:微處理器 - MPU PQ27E A W/O TALITOS RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線(xiàn)寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類(lèi)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
KMPC8271VRTIEA 功能描述:微處理器 - MPU PQ27E A W/O TALITOS RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線(xiàn)寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類(lèi)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
KMPC8271VRTMFA 功能描述:微處理器 - MPU PQ27E A W/O TALITOS RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線(xiàn)寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類(lèi)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
KMPC8271ZQTIEA 功能描述:微處理器 - MPU PQ27E A W/O TALITOS RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線(xiàn)寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類(lèi)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
KMPC8271ZQTMFA 功能描述:微處理器 - MPU PQ27E A W/O TALITOS RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線(xiàn)寬度:32 bit 最大時(shí)鐘頻率:536 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類(lèi)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
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(xiě)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(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*