ADSP-BF561_06 AD [Analog Devices], ADSP-BF561_06 Datasheet - Page 45

• Manufacturer Part Number: ADSP-BF561_06
• Description: Blackfin Embedded Symmetric Multiprocessor
• Manufacturer: AD [Analog Devices]

Figure 43. Typical Rise and Fall Times (10% to 90%) versus Load Capacitance
Figure 44. Typical Rise and Fall Times (10% to 90%) versus Load Capacitance
14
12
10
18
16
14
12
10
8
6
4
2
0
8
6
4
2
0
0
0
SCK (66 MHz DRIVER), V
SCK (66 MHz DRIVER), V
50
50
for Driver D at V
for Driver D at V
LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
100
100
DDEXT
DDEXT
RISE TIME
RISE TIME
(MAX) = 3.65V, TEMPERATURE = 85°C
(MIN) = 2.25V, TEMPERATURE = 85°C
DDEXT
DDEXT
150
150
(max)
(min)
FALL TIME
FALL TIME
200
200
Rev. A | Page 45 of 60 | May 2006
250
250
ENVIRONMENTAL CONDITIONS
To determine the junction temperature on the application
printed circuit board use:
where:
T
T
center of package.
P
the method to calculate P
Values of
circuit board design considerations.
order approximation of T
where:
T
In
JEDEC standards JESD51–2 and JESD51–6, and the junction-
to-board measurement complies with JESD51–8. The junction-
to-case measurement complies with MIL-STD-883
(Method 1012.1). All measurements use a 2S2P JEDEC test
board.
Thermal resistance
merit relating to performance of the package and board in a
convective environment.
under two conditions of airflow.
extracted from the periphery of the board.
correlation between T
package comparison and printed circuit board design
considerations.
Table 34. Thermal Characteristics for BC-256 Package
Table 35. Thermal Characteristics for B-297 Package
Parameter
Parameter
D
J
CASE
A
JA
JMA
JMA
JB
JC
JA
JMA
JMA
JB
JC
JT
JT
JT
= junction temperature ( C).
Table 34
= power dissipation (see
= ambient temperature ( C).
= from
= case temperature ( C) measured by customer at top
JA
Table 34
and
are provided for package comparison and printed
Table
Condition
0 Linear m/s Airflow
1 Linear m/s Airflow
2 Linear m/s Airflow
Not Applicable
Not Applicable
0 Linear m/s Airflow
Condition
0 Linear m/s Airflow
1 Linear m/s Airflow
2 Linear m/s Airflow
Not Applicable
Not Applicable
0 Linear m/s Airflow
T
and
JA
J
T
J
35, airflow measurements comply with
=
J
in
and T
=
Table
T
D
J
Table 34
).
JMA
by the equation:
CASE
T
Power Dissipation on Page 42
A
CASE
represents the thermal resistance
+
35.
+
. Values of
JB
JA
and
represents the heat
JT
JA
P
Table 35
can be used for a first
D
P
D
ADSP-BF561
JT
JB
Typical
25.6
22.4
21.6
18.9
4.85
0.15
Typical
20.6
17.8
17.4
16.3
7.15
0.37
represents the
are provided for
is the figure of
Unit
Unit
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
C/W
for