DSP56F807 Motorola Inc, DSP56F807 Datasheet - Page 17

• Manufacturer Part Number: DSP56F807
• Description: 56F807 16-bit Hybrid Processor
• Manufacturer: Motorola Inc

Notes:
56F807 Technical Data
Junction to ambient
Natural convection
Junction to ambient (@1m/sec)
Junction to ambient
Natural convection
Junction to ambient (@1m/sec)
Junction to case
Junction to center of case
I/O pin power dissipation
Power dissipation
Junction to center of case
1.
2.
3.
4.
5.
6.
Theta-JA determined on 2s2p test boards is frequently lower than would be observed in an application.
Determined on 2s2p thermal test board.
Junction to ambient thermal resistance, Theta-JA (
JEDEC specification JESD51-2 in a horizontal configuration in natural convection. Theta-JA was
also simulated on a thermal test board with two internal planes (2s2p where “s” is the number of
signal layers and “p” is the number of planes) per JESD51-6 and JESD51-7. The correct name for
Theta-JA for forced convection or with the non-single layer boards is Theta-JMA.
Junction to case thermal resistance, Theta-JC (R
values using the cold plate technique with the cold plate temperature used as the “case” temperature.
The basic cold plate measurement technique is described by MIL-STD 883D, Method 1012.1. This
is the correct thermal metric to use to calculate thermal performance when the package is being used
with a heat sink.
Thermal Characterization Parameter, Psi-JT (
point thermocouple on top center of case as defined in JESD51-2.
estimate junction temperature in steady state customer environments.
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.
See Section 5.1 from more details on thermal design considerations.
Characteristic
Freescale Semiconductor, Inc.
For More Information On This Product,
Table 22. Thermal Characteristics
Four layer
board (2s2p)
Four layer
board (2s2p)
Comments
Go to: www.freescale.com
Symbol
P
JT
(2s2p)
R
R
R
JC
R
R
P
DMAX
P
), is the “resistance” from junction to reference
JMA
JMA
JMA
JT
I/O
R
), was simulated to be equivalent to the measured
JC
JA
D
JA
) was simulated to be equivalent to the
P
160-pin
LQFP
D
38.5
35.4
31.5
8.6
0.8
33
User Determined
= (I
(TJ - TA) / JA
DD
JT
Value
x V
is a useful value to use to
6
DD
MBGA
63.4
60.3
49.9
46.8
160
+ P
8.1
0.6
I/O
General Characteristics
)
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
Unit
°C
W
W
Notes
4, 5
1,2
1,2
2
2
3
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