MAX3535EEWI+

MAX3535EEWI+ is an isolated RS-485/RS-422 full duplex transceiver in a 28 pin WSOIC package. It provides 2500VRMS of galvanic isolation between the RS-485/RS-422 side and the processor or control logic side. This device allows 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 also features a 420kHz transformer driver that allows power transfer to the RS-485 side using an external transformer. MAX3535E includes 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 RS-485 receiver is 1/8 unit load, allowing up to 256 devices on the same bus.

• 2500VRMS RS-485 bus isolation using on-chip high-voltage capacitors
• 1000kbps full-duplex RS-485/RS-422 communication
• Power-supply voltage range +3V to +5.5V
• ±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
• Temperature range from -40°C to +85°C

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