Specifications

28 Maxim Industrial Solutions
Programmable logic controllers (PLCs)
Fieldbus functions
Benefits
• Reduce board space by 25% with
integrated fault-protection circuitry
• Highest fault protection from an
integrated transceiver
– Fault protection up to ±80V
DC
• Flexible configurations allow
interfacing with multiple systems
– Wide 3.3V to 5V supply range allows
interfacing with full- and half-duplex
RS-485
• High integration reduces Bill of
Materials (BOM) complexity
– Slew-rate limiting facilitates error-free
data transmission
– True fail-safe operation
– Hot-swap capability
• ESD protection up to ±15kV (HBM)
MAX13448E, MAX3440E–MAX3444E,
MAX13442E/MAX13443E/MAX13444E, MAX3430
In applications where power and data are distributed over the same
cable, there is a potential for miswiring, cable shorts, or surges on
the communication bus. Maxim’s RS-485 MAX13448E, MAX13442E,
MAX3430, and MAX3440E transceiver families offer fault protection
up to ±80V
DC
.
Fault-protected RS- 485 transceivers make equipment more robust
Maxim’s RS-485 family offers high levels of integration which saves board space and reduces cost.
DI
DE
Y
Z
A
B
POLYSWITCH
LIMITERS
ZENERS
Reduces
external components,
saves up to 25%
board space
D
DI
RO
DE
Y
Z
N.C.
R
A
GND
B
V
CC
MAX13448E
DI
RE
RE
Part V
CC
Supply (V) Configuration Fault Protection (V)
MAX13448E 3.3 to 5 Full ±80
MAX3440E–MAX3444E 5 Half ±60
MAX13442E–MAX13444E 5 Half ±80
MAX3430 3.3 Half ±80