参数资料
型号: MPC745BPX350LE
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 350 MHz, RISC PROCESSOR, PBGA255
封装: 21 X 21 MM, 2.80 MM HEIGHT, 1.27 MM PITCH, PLASTIC, BGA-255
文件页数: 60/60页
文件大小: 1559K
代理商: MPC745BPX350LE
MPC755 RISC Microprocessor Hardware Specifications, Rev. 7.0
Freescale Semiconductor
9
Electrical and Thermal Characteristics
The MPC755 incorporates a thermal management assist unit (TAU) composed of a thermal sensor,
digital-to-analog converter, comparator, control logic, and dedicated special-purpose registers (SPRs). See
the MPC750 RISC Microprocessor Family User’s Manual for more information on the use of this feature.
Specifications for the thermal sensor portion of the TAU are found in Table 5.
Table 4. Package Thermal Characteristics 6
Characteristic
Symbol
Value
Unit
Notes
MPC755
CBGA
MPC755
PBGA
MPC745
PBGA
Junction-to-ambient thermal resistance,
natural convection
RθJA
24
31
34
°C/W
1, 2
Junction-to-ambient thermal resistance,
natural convection, four-layer (2s2p) board
RθJMA
17
25
26
°C/W
1, 3
Junction-to-ambient thermal resistance, 200
ft/min airflow, single-layer (1s) board
RθJMA
18
25
27
°C/W
1, 3
Junction-to-ambient thermal resistance, 200
ft/min airflow, four-layer (2s2p) board
RθJMA
14
21
22
°C/W
1, 3
Junction-to-board thermal resistance
RθJB
817
17
°C/W
4
Junction-to-case thermal resistance
RθJC
<0.1
°C/W
5
Notes:
1. Junction temperature is a function of on-chip power dissipation, package thermal resistance, mounting site (board)
temperature, ambient temperature, air flow, power dissipation of other components on the board, and board thermal
resistance.
2. Per SEMI G38-87 and JEDEC JESD51-2 with the single layer board horizontal.
3. Per JEDEC JESD51-6 with the board horizontal.
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.
5. 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 calculated case temperature. The actual value of RθJC for the part is less
than 0.1°C/W.
6. Refer to Section 8.8, “Thermal Management Information,for more details about thermal management.
相关PDF资料
PDF描述
MPC755BPX350LE 32-BIT, 350 MHz, RISC PROCESSOR, PBGA360
MPC755CPX400LE 32-BIT, 400 MHz, RISC PROCESSOR, PBGA360
MPC745BVT300LE 32-BIT, 300 MHz, RISC PROCESSOR, PBGA255
MPC755BVT300LE 32-BIT, 300 MHz, RISC PROCESSOR, PBGA360
MPC823ZC25 32-BIT, RISC PROCESSOR, PBGA256
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