High Output 18V Tolerant RS-485/RS-422 +5V Transceivers

  • 40% Higher SNR (Signal-to-Noise Ratio) compared to other RS-485 devices (2.1V vs. 1.5V)
  • ±18V Fault Tolerance on Analog Bus pins
  • 2.1V Driver Output (Profibus Compliant)
  • 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
  • +4.5V to +5.5V Operation (5V ±10%)
  • 300µA Idle Current, 1nA 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 and 14 NSOIC Packages

  • Motor Control
  • Security Systems
  • Building and Process Automation
  • Remote Utility Meter Reading
  • Energy Monitoring and Control
  • Long or Unterminated Transmission Lines
  • Profibus DP Fieldbus Networks

The XR3080-88X family of high performance RS-485/422 devices are designed for improved performance in noisy industrial environments and increased tolerance to system faults.

The analog bus pins can survive direct shorts up to ±18V, and are protected against ESD events up to ±15kV. The Profibus compliant differential output delivers 40% higher SNR than standard RS-485/422 devices, affording additional noise margin or extended cable lengths.

The receivers include full fail-safe circuitry, guaranteeing a logic-high receiver output when the receiver inputs are open, shorted, or undriven. The receiver input impedance is at minimum 96kΩ (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 well as thermal shutdown, and maintain high impedance in shutdown or when powered off. The XR3080-85X drivers are slew limited for reduced EMI and error-free communication over long or unterminated data cables.

The devices with DE and RE pins include hot swap circuitry to prevent false transitions on the bus during powerup or live insertion, and can enter a 1nA low current shutdown mode for extreme power savings.

The transceivers draw less than 600µA from a +5.0V supply, and typically only 300µA when idling with the receivers active.

For technical support or help choosing a product please email Exar’s Serial Technical Support group at:  serialtechsupport@exar.com.

Part NumberPkg CodeRoHSMin
StatusBuy NowOrder Samples

Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs. 
VCC (V)5
No. of Tx1
No. of Rx1
Data Rate (kbps)250
ESD (kV)15
Typ. Shutdown ICC (µA)1nA
Rx Fail safe OpenYes
Rx Fail safe ShortYes
Multi-Drop Nodesup to 256
Technical Assets
Product Change Notification