參數(shù)資料
型號: MPC859PZP133
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Hardware Specifications
中文描述: 硬件規(guī)格
文件頁數(shù): 9/92頁
文件大?。?/td> 1274K
代理商: MPC859PZP133
MOTOROLA
MPC866/859 Hardware Specifications
For More Information On This Product,
Go to: www.freescale.com
9
Thermal Characteristics
4
Thermal Characteristics
Table 4 shows the thermal characteristics for the MPC866/859.
Table 4. MPC866/859 Thermal Resistance Data
Rating
Environment
Symbol
Value
Unit
Junction-to-ambient
1
1
Junction temperature is a function of on-chip power dissipation, package thermal resistance, mounting site (board)
temperature, ambient temperature, airflow, power dissipation of other components on the board, and board thermal
resistance.
Per SEMI G38-87 and JEDEC JESD51-2 with the single-layer board horizontal.
Per JEDEC JESD51-6 with the board horizontal.
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.
Indicates the average thermal resistance between the die and the case top surface as measured by the cold plate
method (MIL SPEC-883 Method 1012.1) with the cold plate temperature used for the case temperature. For exposed
pad packages where the pad would be expected to be soldered, junction-to-case thermal resistance is a simulated
value from the junction to the exposed pad without contact resistance.
Thermal characterization parameter indicating the temperature difference between package top and junction
temperature per JEDEC JESD51-2.
Natural Convection
Single-layer board (1s)
R
θ
JMA 3
JA 2
2
37
°C/W
Four-layer board (2s2p)
R
θ
3
23
Airflow (200 ft/min)
Single-layer board (1s)
R
θ
JMA3
30
Four-layer board (2s2p)
R
θ
JMA3
19
Junction-to-board
4
4
R
θ
JB
13
Junction-to-case
5
5
R
θ
JC
6
Junction-to-package top
6
6
Natural Convection
Ψ
JT
2
Airflow (200 ft/min)
Ψ
JT
2
F
Freescale Semiconductor, Inc.
n
.
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