Exar – XR32220, XR32430 AND XR32431: RS-232 Transceivers with Adjustable Low Voltage Interface

The XR32220, XR32430 and XR32431 are a family of RS-232 (EIA/TIA-232) transceivers designed to operate from 3V to 5.5V supplies. They include an adjustable low voltage logic interface that simplifies their use in low voltage and multi-voltage systems. The XR32220 and XR32431 feature a low voltage logic pin (VL) that can be used to adjust the transceiver’s logic output levels and input thresholds for compatibility with lower supply voltage logic. The XR32220 is a 2 driver/2 receiver configuration where the XR32430 and XR32431 are 3 driver/5 receiver RS-232 transceivers.


  • 3.0V to 5.5V supply operation
  • Meets true EIA/TIA-232-F standards
  • Regulated charge pump yields stable RS-232 outputs
  • Auto on-line wake-up circuitry
  • 4 x 4mm QFN-24 or 5 x 5mm QFN-32 package
  • 1k MSRP: $0.74 to $0.94 US
  • 1.65V to 5.5V logic interface VL pin (XR32220, XR32431)
  • Auto on-line circuitry automatically wakes up from a 1μA shutdown
  • XR32220: 250kbps min transmission rate
  • XR32430, XR32431: 250kbps/460kbps/1Mbps min transmission rate
  • Enhanced ESD with ±15kV IEC61000-4-2 air discharge