ADSP-BF561SBBCZ-5A2 AD [Analog Devices], ADSP-BF561SBBCZ-5A2 Datasheet - Page 42

• Manufacturer Part Number: ADSP-BF561SBBCZ-5A2
• Manufacturer: AD [Analog Devices]

ADSP-BF561
–100
–100
–150
–100
150
100
100
–50
–20
–40
–60
–80
–20
100
–40
–60
–80
50
60
40
20
80
80
60
40
20
0
0
0
0
0
0
0.5
0.5
0.5
Figure 32. Drive Current C (High V
Figure 34. Drive Current D (High V
Figure 33. Drive Current D (Low V
1.0
1.0
SOURCE VOLTAGE (V)
SOURCE VOLTAGE (V)
SOURCE VOLTAGE (V)
1.0
1.5
1.5
1.5
2.0
2.0
2.0
DDEXT
DDEXT
DDEXT
2.5
2.5
)
)
)
V
V
V
V
V
V
DDEXT
DDEXT
DDEXT
V
V
V
DDEXT
DDEXT
DDEXT
DDEXT
DDEXT
DDEXT
Rev. B | Page 42 of 64 | June 2007
2.5
3.0
3.0
= 3.65V
= 3.30V
= 2.95V
V
= 2.75V
= 2.50V
= 2.25V
= 3.65V
= 3.30V
= 2.95V
V
V
V
OL
V
V
OH
OL
OH
OH
OL
3.5
3.0
3.5
POWER DISSIPATION
Many operating conditions can affect power dissipation. System
designers should refer to Estimating Power for ADSP-BF561
Blackfin Processors (EE-293) on the Analog Devices website
(www.analog.com)—use site search on “EE-293.” This docu-
ment provides detailed information for optimizing your design
for lowest power.
See the ADSP-BF561 Blackfin Processor Hardware Reference
Manual for definitions of the various operating modes and for
instructions on how to minimize system power.
TEST CONDITIONS
All timing parameters appearing in this data sheet were mea-
sured under the conditions described in this section.
shows the measurement point for ac measurements (except out-
put enable/disable). The measurement point V
V
Output Enable Time Measurement
Output pins are considered to be enabled when they have made
a transition from a high impedance state to the point when they
start driving.
The output enable time t
reference signal reaches a high or low voltage level to the point
when the output starts driving as shown on the right side of
Figure 36 on Page
The time t
nal switches, to when the output voltage reaches V
V
(nominal) = 2.5 V/3.3 V. Time t
output starts driving to when the output reaches the V
or V
Time t
If multiple pins (such as the data bus) are enabled, the measure-
ment value is that of the first pin to start driving.
Output Disable Time Measurement
Output pins are considered to be disabled when they stop driv-
ing, go into a high impedance state, and start to decay from their
output high or low voltage. The output disable time t
difference between t
of
DDEXT
TRIP
Figure 36 on Page
(low). V
TRIP
(nominal) = 2.5 V/3.3 V.
ENA
(low) trip voltage.
OUTPUT
INPUT
OR
is calculated as shown in the equation:
ENA
TRIP
Measurements (Except Output Enable/Disable)
_
MEASURED
Figure 35. Voltage Reference Levels for AC
(high) is 2.0 V and V
V
t
MEAS
DIS
t
43.
ENA
is the interval, from when the reference sig-
DIS
=
43.
_
MEASURED
t
=
DIS_MEASURED
ENA
t
ENA_MEASURED
is the interval from the point when a
and t
TRIP
DECAY
is the interval from when the
TRIP
–
t
(low) is 1.0 V for V
DECAY
as shown on the left side
–
t
TRIP
MEAS
is 1.5 V for
TRIP
V
MEAS
Figure 35
(high) or
DIS
TRIP
is the
(high)
DDEXT