Datasheet

+3V to +5V, 2500V
RMS
Isolated RS-485/RS-422
Transceivers with ±15kV ESD Protection
Applications Information
Typical Applications
The MAX3535E/MXL1535E transceivers facilitate bi-
directional data communications on multipoint bus
transmission lines. Figure 11 shows a typical RS-485
multidrop-network applications circuit. Figure 12 shows
the MAX3535E/MXL1535E functioning as line repeaters
with cable lengths longer than 4000ft. To minimize
reflections, terminate the line at both ends in its charac-
teristic impedance. Keep stub lengths off the main line
as short as possible.
DI
DE
RO
TGM-240
1/2
BAT54C
TRANSFORMER
DRIVER
BARRIER
TRANSCEIVER
ISOLATION BARRIER
BARRIER
TRANSCEIVER
1/2
BAT54C
VOLTAGE
REGULATOR
BA
R
D
RE
RO
DE
DI
R
120Ω
D
A
B
RERE
DI
DE
RO
BA
R
D
GND2
+3.3V
DRIVER
RECEIVER
A
B
Y
Z
SLO
RO2
ST1
RO1
RE
DE
DI
GND1
ST2 V
CC2
V
CC1
V
CC2
120Ω
0.1μF
0.1μF
CONTROL GROUND
RS-485 GROUND
10μF
10μF
MAX3535E
R
D
Figure 11. Typical Half-Duplex Multidrop RS-485 Network
MAX3535E/MXL1535E
Maxim Integrated
19