Datasheet
ADSP-BF534/ADSP-BF536/ADSP-BF537
Rev. I|Page 51 of 68 | July 2010
OUTPUT DRIVE CURRENTS
Figure 36 through Figure 47 show typical current-voltage char-
acteristics for the output drivers of the processors. The curves
represent the current drive capability of the output drivers as a
function of output voltage. See Table 9 on Page 20 for informa-
tion about which driver type corresponds to a particular pin.
Figure 36. Drive Current A (Low V
DDEXT
)
Figure 37. Drive Current A (High V
DDEXT
)
Figure 38. Drive Current B (Low V
DDEXT
)
0
SOURCE CURRENT (mA)
SOURCE VOLTAGE (V)
0 0.5 1.0 1.5 2.0 2.5
3.0
100
60
40
-80
-60
-40
-20
120
20
80
- 100
V
DDEXT
= 2.25V @ 95°C
V
DDEXT
= 2.50V @ 25°C
V
DDEXT
= 2.75V @
-
40°C
V
OL
V
OH
0
S
OU
R
C
E
C
U
R
R
E
N
T
(
m
A
)
SOURCE VOLTAGE (V)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
150
100
50
-
150
-
100
-
50
V
OL
V
OH
4.0
V
DDEXT
= 3.0V @ 95°C
V
DDEXT
= 3.3V @ 25°C
V
DDEXT
=3.6V@
-
40°C
0
S
O
U
R
C
E
C
U
R
R
EN
T
(
m
A
)
SOURCE VOLTAGE (V)
00.51.01.52.02.53.0
150
100
-
150
V
OL
V
OH
-
100
-
50
50
V
DDEXT
=2.25V@95°C
V
DDEXT
=2.50V@25°C
V
DDEXT
=2.75V@
-
40°C
Figure 39. Drive Current B (High V
DDEXT
)
Figure 40. Drive Current C (Low V
DDEXT
)
Figure 41. Drive Current C (High V
DDEXT
)
0
S
OU
R
C
E
C
U
R
R
E
N
T
(
m
A
)
SOURCE VOLTAGE (V)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
150
100
50
-
200
-
150
V
OL
V
OH
4.0
-
100
-
50
200
V
DDEXT
=3.0V@95°C
V
DDEXT
=3.3V@25°C
V
DDEXT
=3.6V@
-
40°C
0
S
O
UR
C
E
C
U
R
R
E
N
T
(
m
A
)
SOURCE VOLTAGE (V)
0 0.5 1.0 1.5 2.0 2.5 3.0
80
60
-
60
V
OL
V
OH
-
40
-
20
40
20
V
DDEXT
= 2.25V @ 95°C
V
DDEXT
= 2.50V @ 25°C
V
DDEXT
=2.75V@
-
40°C
0
S
OU
R
C
E
C
U
R
R
E
N
T
(
m
A
)
SOURCE VOLTAGE (V)
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
80
60
40
-
80
-
60
V
OL
V
OH
4.0
-
40
-
20
100
20
V
DDEXT
=3.0V@95°C
V
DDEXT
=3.3V@25°C
V
DDEXT
=3.6V@
-
40°C