SP3249E Intelligent +3.0V to +5.5V RS-232 Transceiver FEATURES 1 24 Meets true EIA/TIA-232-F Standards C2+ C1+ from a +3.0V to +5.5V power supply GND 2 V+ 23 Interoperable with EIA/TIA-232 and C2- 3 VCC 22 adheres to EIA/TIA-562 down to a +2.7V V- 4 21 C1- power source 5 20 T IN T1OUT 1 Minimum 250Kbps data rate under load SP3249E 6 19 T IN T OUT 2 2 Regulated Charge Pump Yields Stable T OUT 7 18 T IN 3 3 RS-232 Outputs Regardless of V CC R IN 8 17 R OUT 1 1 Variations R IN 9 16 R OUT Enhanced ESD Specifications: 2 2 T OUT 10 15 T IN +15kV Human Body Model 4 4 +15kV IEC61000-4-2 Air Discharge R IN 11 14 R OUT 3 3 +8kV IEC61000-4-2 Contact Discharge T OUT 12 13 T IN 5 5 Now Available in Lead Free Packaging DESCRIPTION The SP3249E device is an RS-232 transceiver solution intended for portable or hand-held applications such as notebook and palmtop computers. The SP3249E uses an internal high-efficiency, charge-pump power supply that requires only 0.1F capacitors in 3.3V operation. This charge pump and Exar s driver architecture allow the SP3249E device to deliver compliant RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The SP3249E is a 5-driver / 3-receiver device that is ideal for laptop / notebook computer and PDA applications. SELECTION TABLE Device Power RS-232 RS-232 External Auto TTL 3-State of Supplies Drivers Receivers Components On-Line Pins Circuitry SP3223E +3.0V to +5.5V 2 2 4 Capacitors YES YES 20 SP3243E +3.0V to +5.5V 3 5 4 Capacitors YES YES 28 SP3238E +3.0V to +5.5V 5 3 4 Capacitors YES YES 28 SP3239E +3.0V to +5.5V 5 3 4 Capacitors NO YES 28 SP3249E +3.0V to +5.5V 5 3 4 Capacitors NO NO 24 Exar Corporation 48720 Kato Road, Fremont CA, 94538 510-668-7017 www.exar.com SP3249E 100 013111 1ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability and cause permanent damage to the device. V .......................................................-0.3V to +6.0V CC V+ (NOTE 1).......................................-0.3V to +7.0V V- (NOTE 1)........................................+0.3V to -7.0V V+ + V- (NOTE 1)...........................................+13V I (DC V or GND current).........................+100mA CC CC Input Voltages TxIN, .................................................-0.3V to +6.0V RxIN...................................................................+25V Output Voltages TxOUT.............................................................+13.2V RxOUT........................................-0.3V to (V +0.3V) CC Short-Circuit Duration TxOUT....................................................Continuous Storage Temperature......................-65C to +150C NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V. ELECTRICAL CHARACTERISTICS V = +3.0V to +5.5V, C1 - C4 = 0.1F (tested at 3.3V +/-5%), C1 - C4 = 0.22F (tested at 3.3V +/-10%), CC C1 = 0.047F and C2 - C4 = 0.33F (tested at 5.0V +/-10%), T = T to T , unless otherwise noted. Typical AMB MIN MAX values are at T = 25C A PARAMETER MIN. TYP. MAX. UNITS CONDITIONS DC CHARACTERISTICS Supply Current 0.3 1.0 mA no load LOGIC INPUTS AND RECEIVER OUTPUTS Input Logic Threshold V = +3.3V or +5.0V, TxIN CC LOW 0.8 V HIGH 2.4 V Input Leakage Current +0.01 +1.0 A TxIN,T = +25C AMB Output Voltage LOW 0.4 V I = 1.6mA OUT Output Voltage HIGH V -0.6 V -0.1 V I = -1.0mA CC CC OUT DRIVER OUTPUTS Output Voltage Swing +5.0 +5.4 V All driver outputs loaded with 3K to GND Exar Corporation 48720 Kato Road, Fremont CA, 94538 510-668-7017 www.exar.com SP3249E 100 013111 2