
Exar Corporation
GENERAL DESCRIPTION
The XR33032/35/38 family of high performance half duplex RS-485 transceivers are optimized to operate over a wide range of supply voltage, from +2.8V to +5.5V. The analog bus pins can withstand direct shorts up to ±18V, and are protected against ESD events up to ±15kV.
FEATURES
● +2.8V to +5.5V Operating Range
● ±18V Fault Tolerance on Analog Bus pins
● Robust ESD (ElectroStatic Discharge) Protection:
■ ±15kV IEC 61000-4-2 Air Gap Discharge
■ ± 8kV IEC 61000-4-2 Contact Discharge
■ ±15kV Human Body Model
■ ± 4kV Human Body Model on non-bus pins
● 300µA Idle Current, 40nA Shutdown Current
● Enhanced Receiver Fail-Safe Protection for Open, Shorted, or Terminated but Idle Data Lines
● Hot-Swap Glitch Protection on DE and RE Pins
● Driver Short Circuit Current Limit and Thermal Shutdown for Overload Protection
● 1/8th Unit Load Allows up to 256 Devices on Bus
● Industry Standard 8 NSOIC Half Duplex Package
TYPICAL APPLICATIONS
● Isolated Multipoint RS-485 Data Buses
● Remote Nodes Powered by the Host
● Building Automation and HVAC
● Industrial Process Control Networks
● Remote Utility Meter Reading
● Energy Monitoring and Control