INTELLIGENT +3.0V TO +5.5V RS-232 THREE DRIVERS AND FIVE RECEIVERS WITH LOW POWER SHUTDOWN

The SPB3243 products are 3 driver/5 receiver RS-232 transceiver solutions intended for portable or handheld applications such as notebook and palmtop computers. The SPB3243 includes one complementary receiver that remains alert to monitor an external device's Ring Indicate signal while the device is shutdown. The SPB3243E and EB devices feature slew-rate limited outputs for reduced crosstalk and EMI The "U" and "H" series are optimized for high speed with data rates up to 1Mbps, easily meeting the demands of high speed RS-232 applications. The SPB3243 series uses an internal high-efficiency, charge-pump power supply that requires only 0.1mF capacitors in 3.3V operation. This charge pump and driver architecture allow the SPB3243 series to deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The AUTO ON-LINE feature allows the device to automatically "wake-up" during a shutdown state when an RS-232 cable is connected and a connected peripheral is turned on. Otherwise, the device automatically shuts itself down drawing less than 1mA. By Silan