Exar's Newest RS-232 Transceiver: SP3221E - Intelligent +3.0V to 5.5V RS-232 Transceiver

SP3221E (PresseBox) (Braunschweig, ) A reliable and readily available second source for the popular MAX3221E transceiver. The SP3221E is a low power solution for single driver/single receiver RS-232 applications.

The SP3221E is an RS-232 transceiver for low power serial applications. The AUTO ON-LINE® feature allows the device to enter a low power (less than 1µa) shutdown state when the data cable is removed or if there is no activity on the bus. The transceiver automatically wakes up when the cable is connected or the remote device sends data.


- AUTO ON-LINE® circuitry automatically wakes up from a 1µA typical shutdown
- Regulated charge pump yields stable RS-232 outputs regardless of VCC variations
- Meets RS-232 from a +3.0V to 5.5V power supply and EIA-562 down to +2.7V
- 250kbps data rate under load
- Enhanced ESD specifications
+/-15KV Human Body Model
+/-15KV IEC61000-4-2 Air Discharge
+/-8KV IEC61000-4-2 Contact Discharge

Target Applications

- Low Power Serial Communications
- Portable Serial Devices
- Point-of-Sale Equipment


Arrow Central Europe GmbH
Frankfurter Straße 211
D-63263 Neu-Isenburg
Oliver Block
setron GmbH
Marcom Manager


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