LMS202ECMW datasheet(1/8 Pages) NSC

Il numero della parte	LMS202ECMW

Spiegazioni elettronici	15KV ESD Rated, 5V Single Supply TIA/EIA-232 Dual Transceivers

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Produttore elettronici	NSC [National Semiconductor (TI)]

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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

20048001

March 2003

DS200480

www.national.com

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