MPC8347ZUAJFB Freescale Semiconductor, MPC8347ZUAJFB Datasheet - Page 85

• Manufacturer Part Number: MPC8347ZUAJFB
• Description: IC MPU PWRQUICC II 672-TBGA
• Manufacturer: Freescale Semiconductor

Specifications of MPC8347ZUAJFB

• Processor Type: MPC83xx PowerQUICC II Pro 32-Bit
• Speed: 533MHz
• Voltage: 1.2V
• Mounting Type: Surface Mount
• Package / Case: 672-TBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

20.2
For the following sections, P
See
20.2.1
An estimation of the chip junction temperature, T
where:
The junction-to-ambient thermal resistance is an industry-standard value that provides a quick and easy
estimation of thermal performance. Generally, the value obtained on a single-layer board is appropriate for
a tightly packed printed-circuit board. The value obtained on the board with the internal planes is usually
appropriate if the board has low power dissipation and the components are well separated. Test cases have
demonstrated that errors of a factor of two (in the quantity T
20.2.2
The thermal performance of a device cannot be adequately predicted from the junction-to-ambient thermal
resistance. The thermal performance of any component is strongly dependent on the power dissipation of
surrounding components. In addition, the ambient temperature varies widely within the application. For
Freescale Semiconductor
Junction-to-case thermal
Junction-to-package natural convection on top
Notes
1. Junction temperature is a function of die size, on-chip power dissipation, package thermal resistance, mounting site (board)
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
5. Thermal resistance between the die and the case top surface as measured by the cold plate method (MIL SPEC-883 Method
6. Thermal characterization parameter indicating the temperature difference between package top and the junction temperature
temperature, ambient temperature, air flow, power dissipation of other components on the board, and board thermal
resistance.
the top surface of the board near the package.
1012.1).
per JEDEC JESD51-2. When Greek letters are not available, the thermal characterization parameter is written as Psi-JT.
Table 5
T
T
R
P
A
J
θ
D
Thermal Management Information
JA
= junction temperature (°C)
= ambient temperature for the package (°C)
= power dissipation in the package (W)
MPC8347E PowerQUICC™ II Pro Integrated Host Processor Hardware Specifications, Rev. 11
Estimation of Junction Temperature with Junction-to-Ambient
Thermal Resistance
Estimation of Junction Temperature with Junction-to-Board
Thermal Resistance
for I/O power dissipation values.
= junction-to-ambient thermal resistance (°C/W)
Table 62. Package Thermal Characteristics for PBGA (continued)
T
J
Characteristic
= T
D
A
= (V
+ (R
DD
θ
JA
× I
× P
DD
D
) + P
)
I/O
J
, can be obtained from the equation:
where P
I/O
J
– T
is the power dissipation of the I/O drivers.
A
) are possible.
Symbol
R
ψ
θJC
JT
Value
5
5
°C/W
°C/W
Unit
Notes
Thermal
5
6
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