XR33032/35/38 WIDE SUPPLY 18V TOLERANT RS-485/RS-422 TRANSCEIVERS FEBRUARY 2014 REV. 1.0.0 GENERAL DESCRIPTION FEATURES The XR33032/35/38 family of high performance half +2.8V to +5.5V Operating Range duplex RS-485 transceivers are optimized to operate 18V Fault Tolerance on Analog Bus pins over a wide range of supply voltage, from +2.8V to Robust ESD (ElectroStatic Discharge) Protection: +5.5V. The analog bus pins can withstand direct shorts up to 18V, and are protected against ESD events up 15kV IEC 61000-4-2 Air Gap Discharge to 15kV. 8kV IEC 61000-4-2 Contact Discharge 15kV Human Body Model In an isolated application it may be more efficient to 4kV Human Body Model on non-bus pins use a remote power supply rather than generating an 300A Idle Current, 40nA Shutdown Current isolated supply at every node. The XR33032/35/38 transceivers can operate with more than 2V IR drop in Enhanced Receiver Fail-Safe Protection for Open, the cable when utilizing a remote 5V power supply. Shorted, or Terminated but Idle Data Lines The transceivers draw less than 600A, and typically Hot-Swap Glitch Protection on DE and RE Pins only 300A when idling with the receivers active. Driver Short Circuit Current Limit and Thermal The receivers include full fail-safe circuitry, guarantee- Shutdown for Overload Protection ing a logic-high receiver output when the receiver th 1/8 Unit Load Allows up to 256 Devices on Bus inputs are open, shorted, or undriven. The receiver Industry Standard 8 NSOIC Half Duplex Package input impedance is 96k (1/8 unit load), allowing up to 256 devices on the bus while preserving the full signal margin. The drivers are protected by short circuit detection as TYPICAL APPLICATIONS well as thermal shutdown, and maintain high imped- Isolated Multipoint RS-485 Data Buses ance in shutdown or when powered off. The XR33032 and XR33035 drivers are slew limited for reduced EMI Remote Nodes Powered by the Host and error-free communication over long or untermi- Building Automation and HVAC nated data cables. Industrial Process Control Networks The DE and RE pins include hot swap circuitry to pre- Remote Utility Meter Reading vent false transitions on the bus during power-up or Energy Monitoring and Control live insertion, and can enter a low current shutdown mode (40nA typically) for extreme power savings. 1 8 RO V R CC 2 7 RE B/Z 3 6 DE A/Y 4 5 DI GND D Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com XR33032/35/38 WIDE SUPPLY 18V TOLERANT RS-485/RS-422 TRANSCEIVERS REV. 1.0.0 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections to the specifications below is not implied. V -0.3V to +7.0V CC Input Voltage at Control and Driver Input (RE, DE, and DI) -0.3V to +7.0V -0.3V to (V + 0.3V) Receiver Output Voltage (RO) CC Driver Output Voltage (A and B) 18V Receiver Input Voltage (A and B) 18V Transient Voltage Pulse, through 100 70V Figure 5 Driver Output Current 250mA Storage Temperature Range -65C to +150C Lead Temperature (soldering, 10s) +300C Package Power Dissipation 8-Pin SO = 128.4C/W Maximum Junction Temperature = +150C JA 14-Pin SO = 86C/W JA ORDERING INFORMATION PART NUMBER DUPLEX DATA RATE PACKAGE TEMPERATURE RANGE XR33032ID-F Half 250kbps 8-pin Narrow SOIC -40C to +85C XR33032IDTR-F Half 250kbps 8-pin Narrow SOIC -40C to +85C XR33035ID-F Half 1Mbps 8-pin Narrow SOIC -40C to +85C XR33035IDTR-F Half 1Mbps 8-pin Narrow SOIC -40C to +85C XR33038ID-F Half 10Mbps 8-pin Narrow SOIC -40C to +85C XR33038IDTR-F Half 10Mbps 8-pin Narrow SOIC -40C to +85C NOTE: TR = Tape and Reel part numbers, -F = Green / RoHS Compliant 2