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LMS202E Dataheets PDF



Part Number LMS202E
Manufacturers National Semiconductor
Logo National Semiconductor
Description 15KV ESD Rated / 5V Single Supply TIA/EIA-232 Dual Transceivers
Datasheet LMS202E DatasheetLMS202E Datasheet (PDF)

LMS202E 15KV ESD Rated, 5V Single Supply TIA/EIA-232 Dual Transceivers March 2003 LMS202E 15KV ESD Rated, 5V Single Supply TIA/EIA-232 Dual Transceivers General Description The LMS202E features two transmitters and two receivers for RS-232 communication. It has a DC-to-DC converter that permits the device to operate with only a single +5V power supply. The on-chip DC-to-DC converter which utilizes four external 0.1µF capacitors to generate dual internal power supplies for RS-232 compatible out.

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LMS202E 15KV ESD Rated, 5V Single Supply TIA/EIA-232 Dual Transceivers March 2003 LMS202E 15KV ESD Rated, 5V Single Supply TIA/EIA-232 Dual Transceivers General Description The LMS202E features two transmitters and two receivers for RS-232 communication. It has a DC-to-DC converter that permits the device to operate with only a single +5V power supply. The on-chip DC-to-DC converter which utilizes four external 0.1µF capacitors to generate dual internal power supplies for RS-232 compatible output levels. The device meet EIA/TIA-232E and CCITT V.28 specifications up to 230kbits/sec. The LMS202E is available in a 16 pin narrow and wide SOIC package. The transmitter outputs and receiver inputs have ± 15kV electrostatic discharge (ESD) protection. The LMS202E survives a ± 15kV ESD event to the RS-232 input and output pins when subjected according to Human Body Model or IEC 1000-4-2 (EN61000-4-2),air-gap specification. It survives a ± 8kV discharge when subjected to IEC 1000-4-2 (EN610004-2), contact specification. This device is designed for use in harsh environments where ESD is a concern. Features n ESD protection for RS-232 I/O pins — ± 15kV-IEC1000 4-2 (EN61000-4-2) Contact Discharge — ± 8kV-IEC1000 4-2 (EN61000-4-2) Air-Gap Discharge — ± 15kV Human Body Model n Single +5V power supply n 230 kbps data rate n On-board DC-to-DC converter n 0.1µF charge pump capacitors n Drop-in replacement to Maxim’s MAX202E Applications n POS equipment (Bar code reader) n Hand-held equipment n General purpose RS-232 communication Connection Diagram and Typical Circuit 20048001 © 2003 National Semiconductor Corporation DS200480 www.national.com LMS202E Pin Descriptions Pin Number 1, 3 2 4, 5 6 7, 14 Pin Name C1+, C1− V+ C2+, C2− V− T1out, T2out Pin Function External capacitor connection pins. Recommended external capacitor C1 = 0.1µF (6.3V) Positive supply for TIA/EIA-232E drivers. Recommended external capacitor C4 = 0.1µF (6.3V) External capacitor connection pins. Recommended external capacitor C2 = 0.1µF (16V) Negative supply for TIA/EIA-232E drivers. Recommended external capacitor C3 = 0.1µF (16V) Transmitter output pins conform to TIA/EIA-232E levels. The typical transmitter output swing is ± 8V when loaded 3kΩ load to ground. The open-circuit output voltage swings from (V+ − 0.6V) to V− Receiver inputs accept TIA/EIA-232 Transmitter input pins are TTL/CMOS compatible. Inputs of transmitter do not have pull-up resistors. Connect all unused transmitter inputs to ground Ground pin Power supply pin for the device, +5V ( ± 10%) 8,13 9, 12 10, 11 15 16 R1in, R2in Tin1, Tin2 GND VS R1out and R2out Receiver output pins are TTL/CMOS compatible Ordering Information Package Part Number LMS202ECM 16-Pin SOIC LMS202ECMX LMS202EIM LMS202EIMX LMS202ECMW 16-Pin Wide SOIC LMS202ECMWX LMS202EIMW LMS202EIMWX Package Marking LMS202ECM LMS202EIM LMS202ECMW LMS202EIMW Transport Media 48 Units/Rail 2.5k Units Tape and Reel 48 Units/Rail 2.5k Units Tape and Reel 45 Units/Rail 1.0k Units Tape and Reel 45 Units/Rail 1.0k Units Tape and Reel M16B M16A NSC Drawing www.national.com 2 LMS202E Absolute Maximum Ratings (Note 1) (Note 9) ESD Rating (MM) Soldering Information Infrared or Convection (20sec.) Junction Temperature Storage Temperature Range 2kV 200V (Note 6) (Note 9) 235˚C 150˚C −65˚C to +150˚C If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VS V+ V− Driver Input Voltage, TIN Receiver Input Voltage, RIN Driver Output Voltage TO Receiver Output Voltage RO Short Circuit Duration, TO ESD Rating IEC 1000-4-2) (Note 7) (Note 8) Air-Gap Discharge Contact Discharge Human Body Model (Note 2) (Note 8) 15kV 15kV 8kV −0.3V to 6V (VS − 0.3V) to + 14V +0.3V to −14V −0.3V to (V+ +0.3V) ± 30V (V− −0.3V to (V+ + 0.3V) −0.3 to (VS + 0.3) Continuous Operating Ratings Supply Voltage VS Ambient Temperature Range, TA Commercial (C) Industrial (I) Package Thermal Resistance (Note 3) SO WSO 71˚C/W 55˚C/W 0˚C to +70˚C −40˚C to +85˚C 4.5V to 5.5V Electrical Characteristics Over recommended operating supply and temperature ranges unless otherwise specified C1 = C2 = C3 = C4 = Cbp = 0.1µF Symbol DC Characteristics IS Logic IINPUT VTHL VTHH VOL VOH Input Leakage Current Input Logic Theshold Low Input Logic Theshold High TTL/CMOS Output Voltage Low TTL/CMOS Output Voltage High Receiver Input Voltage Range Receiver Input Theshold Low Receiver Input Theshold High Receiver Input Hysteresis Receiver Input Resistance Transmitter Output Voltage Swing Output Resistance Output Short Circuit Current Maximum Data Rate CL = 50pF to 1000pF, RL = 3kΩ to 7kΩ 230 VS = 5V, TA = 25˚C VS = 5V, TA = 25˚C VS = 5V VS = 5V, TA = 25˚C All transmitters loaded with 3kΩ to GND VS = V+ = V− = 0V, VO = ± 2V 0.2 3 TIN = 0V to VS TIN TIN ROUT, IOUT = 3.2mA ROUT, IOUT = −1.0mA 3.5 VS −0.1 2.0 0.4 Supply Current No Load, TA = 25˚C 1 7 mA µA V V V V Parameter Conditi.


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