SP238a +5V Powered Multi-channel RS-232 Drivers/Receivers Operates from a Single +5V Power Supply Meets All RS-232D and V.28 Specifications 30V Receiver Input Levels Low Power CMOS Operation Operates with 0. F ceramic capacitors Lead Free Packaging DeScRiPtion The SP238a is a multi-channel RS-232 line transceiver that can fit most communication needs, espe- cially where 2V is not available. It features a built-in charge pump voltage converter, allowing it to operate from a single +5V power supply. All drivers and receivers meet all EIA RS-232D and CCITT V.28 requirements. The SP238A is available in a WSOIC lead free package. Selection table Model Power No. of No. of External Low TTL Wake-up No. of Supplies RS-232 RS-232 Components Power 3-State Pins Drivers Receivers Shutdown SP238A +5V 4 4 4 Capacitors No No No 24 Exar Corporation 48720 Kato Road, Fremont CA, 94538 (50)668-70 7 www .exar.com SP238A 00 07 4 0 abSolUte MaXiMUM RatinGS Output Voltages: This is a stress rating only and functional operation of the device T ........................................................... (V+, +0.3V) to (V-, -0.3V) OUT at these or any other conditions above those indicated in the R ..................................................................-0.3V to (Vcc +0.3V) OUT operation sections of this specification is not implied. Exposure to Short Circuit Duration: absolute maximum rating conditions for extended periods of time T .................................................................................Continuous OUT may affect reliability. Power Dissipation: Small Outline ........................................................................375mW (derate 7mW/C above +70C) V ..............................................................................................+6V CC + V ...................................................................(Vcc - 0.3V) to + 3.2V V .............................................................................................3.2V Input Voltages: T ...................................................................... 0.3 to (Vcc +0.3V) IN R ............................................................................................30V IN electRical cHaRacteRiSticS V =+5V10% All specifications T to T unless otherwise noted. CC MIN MAX PaRaMeteRS Min. tYP. MaX. UnitS conDitionS Power Requirements V Power Supply Current 5.0 0.0 mA No Load, T = +25C CC A Shutdown Supply Current .0 0 A T = +25C A logic inputs Input Logic Threshold, LOW 0.8 V T IN Input Logic Threshold, HIGH 2.0 V T IN Logic Pull-up Current 5 200 A T = 0V IN RS-232 inputs RS-232 Input Voltage Range -30 +30 V RS-232 Input Threshold, LOW 0.8 .2 V V = 5V, T = +25C CC A RS-232 Input Threshold, HIGH .7 2.4 V V = 5V, T = +25C CC A RS-232 Input Hysteresis 0.2 0.5 .0 V V = 5V CC RS-232 Input Impedance 3 5 7 k T = +25C, -15V V +15V A IN logic outputs Output Voltage LOW 0.4 V I = 3.2mA OUT Output Voltage HIGH 3.5 V I = .0mA OUT RS-232 outputs Propagation Delay .5 s RS-232 to TTL Instantaneous Slew Rate 30 V/s C = 0pF, R = 3-7k L L T = +25C A Transition Region Slew Rate 3 V/s C = 2500pF, R = 3k mea- L L sured from +3V to -3V or -3V to +3V Output Voltage Swing +/-5.0 V All Driver outputs loaded with 3k to Ground Output Resistance 300 V = 0V V = +/-2V CC OUT Output Short-Circuit Current +/-0 mA Infinite duration Exar Corporation 48720 Kato Road, Fremont CA, 94538 (5 0)668-707 www .exar.com SP238A 00 074 0 2