1-Channel Integrated UART And RS-232 Transceiver


  • Meets true EIA/TIA-232-F Standards from +3.0V to +5.5V operation
  • Up to 250 Kbps data transmission rate
  • 45us sleep mode exit (charge pump to full power)
  • ESD protection for RS-232 I/O pins at
    • +/-15kV - Human Body Model
    • +/-15kV - IEC 61000-4-2, Air-Gap Discharge
    • +/- 8kV - IEC 61000-4-2, Contact Discharge
  • Software compatible with industry standard 16550 UART
  • Intel/Motorola bus select
  • Complete modem interface
  • Sleep and Power-save modes to conserve battery power
  • Wake-up interrupt upon exiting low power modes
  • Pb-Free, RoHS Compliant Versions Offered

  • Battery-Powered Equipment
  • Handheld and Mobile Devices
  • Handheld Terminals
  • Industrial Peripheral Interfaces
  • Point-of-Sale (POS) Systems

The XR19L220 (L220) is a highly integrated device that combines a full-featured single channel Universal Asynchronous Receiver and Transmitter (UART) and an RS-232 transceiver. The L220 is designed to operate with a single 3.3V or 5V power supply. The L220 is fully compliant with EIA/TIA-232-F Standards from a +3.0V to +5.5V power supply. The device operates at 250 Kbps data rate with worst case 3K ohms load. Both RS-232 driver outputs and receiver inputs can operate in harsh electrical environments of +/-15V without damage and can survive multiple +/-15kV ESD on the RS-232 lines, while maintaining RS-232 output levels.

The L220 operates in four different modes: Active, Partial Sleep, Full Sleep and Power-Save. Each mode can be invoked via hardware or software.

For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.

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. 
CPU InterfaceIntel or Motorola
RS-232 Drivers/ Receivers3/5
Max Data Rate @ 5/3.3/2.5/1.8V (Mbps)na/0.25/na/na
Tx/Rx FIFO (Bytes)16/16
Tx/Rx FIFO CtrsNo
Tx/Rx FIFO INT Trig4 Levels/ 4 Levels
IrDa SupNo
5V Tol InputsYes
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