3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
MAX3483/MAX3485/MAX3486/MAX3488/MAX3490/MAX3491
375Ω
R
L
2
D
V
OD
R
L
2
D
V
OC
V
CC
375Ω
V
OD
R
L
V
CM
=
-7V to +12V
V
CC
Figure 4. Driver V
OD
and V
OC
Figure 5. Driver V
OD
with Varying Common-Mode Voltage
V
ID
R
0V
V
OL
I
OL
(+)
V
OH
I
OH
(-)
Figure 6. Receiver V
OH
and V
OL
3V
IN
C
L
D
GENERATOR
(NOTE 4)
50Ω
V
CC
C
L
C
L
= 15pF (NOTE 5)
90%
OUT
50%
10%
t
TD
90%
50%
10%
t
TD
R
L
=
60Ω
OUT
t
DO
t
DO
1.5V
1.5V
0V
≈
2.0V
≈
-2.0V
Figure 7. Driver Differential Output Delay and Transition Times
8
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