Datasheet

150
100
50
0
150
100
50
0
ADSP-BF561
OUTPUT DRIVE CURRENTS
150
V
OH
V
OL
V
DDEXT
= 2.25V
V
DDEXT
= 2.50V
V
DDEXT
= 2.75V
0
0.5 1.0 1.5 2.0 2.5 3.0
SOURCE VOLTAGE (V)
Figure 29 through Figure 36 on Page 42 show typical current
voltage characteristics for the output drivers of the
100
ADSP-BF561 processor. The curves represent the current drive
capability of the output drivers as a function of output voltage.
Refer to Table 8 on Page 17 to identify the driver type for a pin.
SOURCE CURRENT (mA)
50
0
V
OH
V
OL
V
DDEXT
= 2.25V
V
DDEXT
= 2.50V
V
DDEXT
= 2.75V
–100
–150
–50
SOURCE CURRENT (mA)
–50
Figure 31. Drive Current B (Low V
DDEXT
)
–100
150
–150
0
0.5 1.0 1.5 2.0 2.5 3.0
100
SOURCE VOLTAGE (V)
0
V
OH
V
DDEXT
= 2.95V
V
DDEXT
= 3.30V
V
DDEXT
= 3.65V
V
OL
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
SOURCE CURRENT (mA)
50
Figure 29. Drive Current A (Low V
DDEXT
)
0
V
OH
V
DDEXT
= 2.95V
V
DDEXT
= 3.30V
V
DDEXT
= 3.65V
V
OL
–100
–150
–50
SOURCE CURRENT (mA)
SOURCE VOLTAGE (V)
–50
Figure 32. Drive Current B (High V
DDEXT
)
–100
60
–150
40
0.5 1.0 1.5 2.0 2.5 3.0 3.5
SOURCE VOLTAGE (V)
20
V
OH
V
OL
V
DDEXT
= 2.25V
V
DDEXT
= 2.50V
V
DDEXT
= 2.75V
Figure 30. Drive Current A (High V
DDEXT
)
SOURCE CURRENT (mA)
0
–20
–40
–60
0
0.5
1.0 1.5 2.0 2.5 3.0
SOURCE VOLTAGE (V)
Figure 33. Drive Current C (Low V
DDEXT
)
Rev. E | Page 41 of 64 | September 2009