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DESCRIPTION

The SP3223E and 3243E products are RS-232 transceiver solutions intended for portable or hand-held applications such as notebook and palmtop computers. The SP3223E and 3243E use an internal high-efficiency, charge-pump power supply that requires only 0.1μF capacitors in 3.3V operation. This charge pump and Sipexs driver architecture allow the SP3223E/3243E series to deliver compliant RS-232 performance from a single power supply ranging from +3.3V to +5.0V. The SP3223E is a 2-driver/2-receiver device, and the SP3243E is a 3-driver/5-receiver device ideal for laptop/notebook computer and PDA applications. The SP3243E includes one complementary receiver that remains alert to monitor an external devices Ring Indicate signal while the device is shutdown.

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.

■ Meets true EIA/TIA-232-F Standards

from a +3.0V to +5.5V power supply

■ Interoperable with EIA/TIA-232 and

adheres to EIA/TIA-562 down to a +2.7V

power source

■ AUTO ON-LINE? circuitry automatically

wakes up from a 1μA shutdown

■ Minimum 120Kbps data rate under load

■ Regulated Charge Pump Yields Stable

RS-232 Outputs Regardless of VCC

Variations

■ Enhanced ESD Specifications:

+15KV Human Body Model

+15KV IEC1000-4-2 Air Discharge

+8KV IEC1000-4-2 Contact Discharge