2-Driver/2-Receiver Intelligent RS-232 Transceiver with 1.65V-5.5V Interface


The XR32220 product is a 2 driver/ 2 receiver RS-232 transceiver featuring a variable low voltage logic interface, down to 1.65V.

This product is intended for portable or hand-held applications such as notebook and palmtop computers. The XR32220EBER device feature slew-rate limited outputs for reduced crosstalk and EMI. The XR32220EUER device is optimized for high speed with data rates up to 1Mbps, easily meeting the demands of high speed RS-232 applications.

The XR32220 uses an internal high-efficiency charge-pump power supply that requires only four 0.1μF capacitors in 3.3V operation. This charge pump combined with Exar's driver architecture allow the XR32220 to deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.5V.

The AUTO ON-LINE® feature allows the device to automatically "wake-up" during a shutdown state when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise, the device automatically shuts itself down drawing less than 1μA.

For technical support or help choosing a product please email Exar’s Serial Technical Support group at:  serialtechsupport@exar.com.
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  • 1.65V to 5.5V Logic Interface VL pin
  • Small 4mm x 4mm 24-pin QFN package
  • AUTO ON-LINE circuitry automatically wakes up from a 1µA shutdown
  • Enhanced ESD Specifications
    • ±15kV Human Body Model
    • ±15kV IEC61000-4-2 Air Discharge
    • ±8kV IEC61000-4-2 Contact Discharge
  • 250Kbps min transmission rate (speed grade B)
  • 1000Kbps min transmission (speed grade U)
  • Meets true EIA/TIA-232-F Standards from a +3.0V to 5.5V power supply
  • Regulated Charge Pump yields stable RS-232 Outputs regardless of VCC variations
  • -40°C to 85°C ambient operating temperature


  • Industrial and Single Board Computers
  • Industrial and Process Control Equipment
  • Point-Of-Sales Equipment
  • Building Security and Automation

Design Tools

Technical Library


Pkg Code Details Quantities Dimensions PDF
QFN24 4x4
  • JEDEC Reference: MO-220
  • MSL Pb-Free: L2 @ 260ºC
  • MSL SnPb Eutectic: n/a
  • ThetaJA: 29.4ºC/W
  • Bulk Pack Style: Canister¹
  • Quantity per Bulk Pack: n/a
  • Quantity per Reel: 3000
  • Quantity per Tube: n/a
  • Quantity per Tray: 490
  • Reel Size (Dia. x Width x Pitch): 330 x 12 x 8
  • Tape & Reel Unit Orientation: Pin 1 at sprocket hole.
  • Dimensions: mm
  • Length: 4.00
  • Width: 4.00
  • Thickness: 0.90
  • Lead Pitch: 0.50

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
XR32220EBER-L QFN24 4x4 -40 85 Active
XR32220EBER-L/TR QFN24 4x4 -40 85 Active
XR32220EUER-L QFN24 4x4 -40 85 Active
XR32220EUER-L/TR QFN24 4x4 -40 85 EOL Suggested:
Show obsolete parts
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.
Distribution Date Description File
07/21/2017 Qualification of alternate assembly subcon, ANST. PCN 17-0626-01 ANST-1033.pdf
07/11/2017 Product Discontinuation Notification PDN_17-0626-02-1033.pdf