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( File format: PDF, 138 Kbytes )
15KV ESD Rated, 5V Single Supply TIA/EIA-232 Dual Transceivers
National Semiconductor

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 0.1?F 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 (EN61000-4-2), contact specification. This device is designed for use in harsh environments where ESD is a concern.
Features
ESD protection for RS-232 I/O pins




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