The SP3223EH and 3243EH products are RS-232 transceiver solutions intended for portableor hand-held applications such as notebook and palmtop computers. The "H" series is basedon Sipex's SP3223E/3243E series and has been enhanced for high speed. The data rate isimproved to 460Kbps, easily meeting the demands of high speed RS-232 applications. TheSP3223EH and 3243EH use an internal high-efficiency, charge-pump power supply thatrequires only 0.1μF capacitors in 3.3V operation. This charge pump and Sipex's driverarchitecture allow the SP3223EH/3243EH series to deliver compliant RS-232 performance froma single power supply ranging from +3.3V to +5.0V. The SP3223EH is a 2-driver/2-receiverdevice, and the SP3243EH is a 3-driver/5-receiver device, ideal for laptop/notebook computerand PDA applications. The SP3243EH includes one complementary receiver that remainsalert to monitor an external device's Ring Indicate signal while the device is shutdown.The Auto-Online feature allows the device to automatically "wake-up" during a shutdownstate 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.