SP3220

® SP3220 +3.0V to +5.5V RS-232 Driver/Receiver Pair ■ Meets True RS-232 Protocol Operation From A +3.0V to +5.5V Power Supply ■ Minimum 120 Kbps Data Rate Under Full Load ■ 1µA Low-Power Shutdown With Receivers Active ■ Interoperable With RS-232 Down To +2.7V Power Source ■ Pin-Compatible With The MAX3221E Device Without The AUTO ON-LINE® Feature ■ ESD Specifications: +2kV Human Body Model DESCRIPTION The SP3220 device is an RS-232 driver/receiver solution intended for portable or hand-held applications such as notebook or palmtop computers. The SP3220 device has a highefficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V operation. This charge pump allows the SP3220 device to deliver true RS-232 performance from a single power supply ranging from +3.3V to +5.0V. The SP3220 device has a low-power shutdown mode where the driver outputs and charge pumps are disabled. During shutdown, the supply current falls to less than 1µA. VCC + 15 VCC 2 C1+ 0.1µF 4 C15 C2+ C2 + 0.1µF 6 C211 T1IN 9 R1OUT 5kΩ 1 EN GND 14 *can be returned to either VCC or GND SHDN 16 T1OUT R1IN 13 8 V+ 3 *C3 + 0.1µF C5 0.1µF C1 + SP3220 V- 7 C4 + 0.1µF LOGIC INPUTS LOGIC OUTPUTS RS-232 OUTPUTS RS-232 INPUTS Rev. 6/25/03 SP3220 True +3.0 to +5.0V RS-232 Transceivers © Copyright 2003 Sipex Corporation 1 SP 32 20 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the opera...