®
SP3249E
Intelligent +3.0V to +5.5V RS-232 Transceivers
s Meets true EIA/TIA-232-F Standards from a +3.0V to +5.5V po...
®
SP3249E
Intelligent +3.0V to +5.5V RS-232 Transceivers
s Meets true EIA/TIA-232-F Standards from a +3.0V to +5.5V power supply s Interoperable with EIA/TIA-232 and adheres to EIA/TIA-562 down to a +2.7V power source s Minimum 250Kbps data rate under load s Regulated Charge Pump Yields Stable RS-232 Outputs Regardless of VCC Variations s Enhanced ESD Specifications: +15KV Human Body Model +15KV IEC1000-4-2 Air Discharge +8KV IEC1000-4-2 Contact Discharge DESCRIPTION The SP3249E device is an RS-232 transceiver solution intended for portable or hand-held applications such as notebook and palmtop computers. The SP3249E uses an internal high-efficiency, charge-pump power supply that requires only 0.1µF
capacitors in 3.3V operation. This charge pump and Sipex's driver architecture allow the SP3249E device to deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.0V. The SP3249E is a 5-driver/3-receiver device, ideal for laptop/notebook computer and PDA applications.
SELECTION TABLE
Part Number Power Supplies RS-232 Drivers RS-232 Receivers External Components AUTO ON-LINE™ Circuitry TTL 3-State Number of Pins
SP3223E SP3243E SP3238E SP3239E SP3249E
+3.0V to +5.5V +3.0V to +5.5V +3.0V to +5.5V +3.0V to +5.5V +3.0V to +5.5V
2 3 5 5 5
2 5 3 3 3
4
capacitors 4
capacitors 4
capacitors 4
capacitors 4
capacitors
YES YES YES NO NO
YES YES YES YES NO
20 28 28 28 24
Applicable U.S. Patents - 5,306,954; and other patents pending.
Rev.4/08/02 SP3...