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02-20-2016

3.3 V/5 V 20 Mbps RS-485 Transceiver Family Provides ± 60 V Fault Protection for Improved System Reliability

Exar » XR33053, XR33152, XR33156, XR33158

Exar Corporation introduces a new family of +60 V fault protected RS-485/RS-422 (TIA-485/TIA-422) transceivers able to withstand direct shorts and achieve overvoltage protection with no external components. Designed for improved performance in noisy industrial environments and increased tolerance to system faults, these transceivers simplify design in building automation, HVAC networks, energy metering, process control and other industrial automation applications.

Exar - XR33156

At initial launch, the family includes four parts: XR33053, XR33152, XR33156 and XR33158. The XR33156 is the most feature-rich ±60 V tolerant device on the market with cable invert control to correct for reversed bus pins and a low voltage logic pin, eliminating the need for a level shifter in low voltage applications. Other inherent protection features include +25 V common mode voltage, hot swap glitch protection, overload protection and enhanced receiver fail-safe protection for open, shorted or terminated but idle data lines.

The XR33053, XR33152, XR33156 and XR33158 operate over a wide 3 V to 5.5 V supply voltage range and feature the industry's lowest standby current of 1 µA (max), 1 nA (typ). They support data rates up to 20 Mbps in either full- or half-duplex configurations, exceed +15 kV ESD protection on the bus pins and operate over the standard industrial temperature range of -40 °C to 85 °C.

Summary of features:

  • Wide 3.0 V to 5.5 V supply operation
  • +60 V fault tolerance on analog bus pins
  • Extended ±25 V common mode operation
  • 1.65 V to 5.5 V I/O logic interface VL pin (XR33156)
  • <1 uA (max) standby current
  • 20 Mbps maximum data rate
  • Robust ESD (Electrostatic Discharge) protection for RS-485 bus pins
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