The MAX3535E/MXL1535E isolated RS-485/RS-422 full-duplex
transceivers provide 2500VRMS of galvanic isolation
between the RS-485/RS-422 side and the processor
or control logic side. These devices allow fast,
1000kbps communication across an isolation barrier
when the common-mode voltages (i.e., the ground
potentials) on either side of the barrier are subject to
large differences. Isolation is achieved through integrated
high-voltage capacitors. The MAX3535E/MXL1535E
also feature a 420kHz transformer driver that allows
power transfer to the RS-485 side using an external
transformer.
The MAX3535E/MXL1535E include one differential driver,
one receiver, and internal circuitry to send the RS-485
signals and control signals across the isolation barrier
(including the isolation capacitors). The MAX3535E/MXL1535E RS-485 receivers are 1/8 unit load, allowingup to 256 devices on the same bus.
The MAX3535E/MXL1535E feature true fail-safe circuitry.
The driver outputs and the receiver inputs are protected
from ±15kV electrostatic discharge (ESD) on the interface
side, as specified in the Human Body Model (HBM).
The MAX3535E/MXL1535E feature driver slew-rate
select that minimizes electromagnetic interference (EMI)
and reduces reflections. The driver outputs are short-circuit
and overvoltage protected. Other features are hot-swap
capability and isolation-barrier fault detection.
The MAX3535E operates with a single +3V to +5.5V
power supply. The improved secondary supply range of
the MAX3535E allows the use of step-down transformers
for +5V operation, resulting in considerable power savings.
The MXL1535E operates with a single +4.5V to
+5.5V power supply. The MXL1535E is a function-/pin-compatible
improvement of the LTC1535. The MAX3535E/MXL1535E are available over the commercial 0°C to +70°C and extended -40°C to +85°C temperature
ranges.
Key Features
Applications/Uses
2500VRMS RS-485 Bus Isolation Using On-Chip High-Voltage Capacitors
1000kbps Full-Duplex RS-485/RS-422 Communication
+3V to +5.5V Power-Supply Voltage Range (MAX3535E)
+4.5V to +5.5V Power-Supply Voltage Range (MXL1535E)
1/8 Unit Receiver Load, Allowing 256 Devices on Bus
±15kV ESD Protection Using HBM
Pin-Selectable Slew-Rate Limiting Controls EMI
Hot-Swap-Protected Driver-Enable Input
Undervoltage Lockout
Isolation-Barrier Fault Detection
Short-Circuit Protected
Thermal Shutdown
Open-Line and Shorted-Line Fail-Safe Receiver Inputs
Industrial-Control Local Area Networks
Isolated RS-485 Systems
Systems with Large Common-Mode Voltages
Telecommunications Systems
Key Specifications:
RS-422/485 Line Driver/Receivers
Notes: *This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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