参数资料
型号: MPC859TZP133
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 133 MHz, RISC PROCESSOR, PBGA357
封装: PLASTIC, BGA-357
文件页数: 89/92页
文件大小: 1018K
代理商: MPC859TZP133
MOTOROLA
MPC866/859 Hardware Specications
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, airow, power dissipation of other components on the board, and board thermal
resistance.
Natural Convection
Single-layer board (1s)
RθJA
2
2 Per SEMI G38-87 and JEDEC JESD51-2 with the single-layer board horizontal.
37
°C/W
Four-layer board (2s2p)
RθJMA
3
3 Per JEDEC JESD51-6 with the board horizontal.
23
Airow (200 ft/min)
Single-layer board (1s)
RθJMA
30
Four-layer board (2s2p)
RθJMA
19
Junction-to-board 4
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.
RθJB
13
Junction-to-case 5
5 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.
RθJC
6
Junction-to-package top 6
6 Thermal characterization parameter indicating the temperature difference between package top and junction
temperature per JEDEC JESD51-2.
Natural Convection
ΨJT
2
Airow (200 ft/min)
ΨJT
2
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