The MAX3232CSE has two receivers and two drivers,and a dual charge-pump circuit. The device meets the  requirements of TIA/EIA-232-F and provides the electrical  interface between an asynchronous communication controller and the serial-port connector. The charge pump and  four small external capacitors allow operation from a single  3.0V to 5.5V supply. The device operates at data signaling  rates up to 250kbit/s and a maximum of 35V/μs driver  output slew rate.