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The SP3223E and 3243E products are RS-232 transceiver solutions intended for portable or hand-held applications such as notebook and palmtop computers. The SP3223E and 3243E use 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 SP3223E/3243E series to deliver compliant RS-232 performance from a single power supply ranging from +3.3V to +5.0V. The SP3223E is a 2-driver/2-receiver device, and the SP3243E is a 3-driver/5-receiver device ideal for laptop/notebook computer and PDA applications.The SP3243E includes one complementary receiver that remains alert to monitor an external device's Ring Indicate signal while the device is shutdown.
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 1µA.
SP3243E Maximum Ratings
VCC.............................................................................-0.3V to +6.0V V+ (NOTE 1)................................................................-0.3V to +7.0V V- (NOTE 1).................................................................+0.3V to -7.0V V+ + |V-| (NOTE 1)....................................................................+13V ICC (DC VCC or GND current)...............................................+100mA Input Voltages TxIN, ONLINE, SHUTDOWN, EN (SP3223E)........................................-0.3V to +6.0V RxIN.........................................................................................+15V Output Voltages TxOUT......................................................................................+15V RxOUT, STATUS...............................................-0.3V to (VCC + 0.3V) Short-Circuit Duration TxOUT............................................................................Continuous Storage Temperature.........................................-65°C to +150°C Power Dissipation per package 28-pin PDIP (derate 16.0mW/oC above+70oC).................1300mW 20-pin SSOP (derate 9.25mW/oC above +70oC).................750mW 20-pin TSSOP (derate 11.1mW/oC above +70oC)...............900mW 28-pin SOIC (derate 12.7mW/oC above +70oC)...............1000mW 28-pin SSOP (derate 11.2mW/oC above +70oC).................900mW