DESCRIPTION
The SP3220E devices are RS-232 driver/receiver solutions intended for portable or hand-held applications such as palmtop computers, instrumentation and consumer products. These devices incorporate a high-efficiency charge-pump power supply that allows the SP3220E devices to deliver true RS-232 performance from a single power supply ranging from +3.0V to  +5.0V.  This  charge  pump  requires  only  0.1µF  capacitors  in  3.3V  operation. 

■ Meets All EIA-232 and ITU V.28 Specifications from a wide +3.0V to +5.5V power supply
● Interoperable with RS232 and V.28 at 2.7V
■ Supports High Serial DataRates:
  ● 120 kbps SP3220E
  ● 250 kbps SP3220EB
  ● 1 Mbps SP3220EU
■ 1µA Low Power Shutdown Mode
■ Footprint Compatible with MAX3221E, ISL3221
■ 4 x 0.1µF External Charge Pump Capacitors
■ Tri–State/Receiver Enable
■ Improved ESD Specifications:
  ● +15kV Human Body Model
  ● +15kV IEC1000-4-2 Air Discharge
  ● +8kV IEC1000-4-2 Contact Discharge