LMS202E Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – 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 specifica-
tions 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 sur-
vives 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
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
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