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General Description

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

Features

? 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

Applications

?? Isolated RS-485 Systems

?? Systems with Large Common-Mode Voltages

?? Industrial-Control Local Area Networks

?? Telecommunications Systems