5

REV: A DATE:12/03/2003

+5V High-Speed RS232 Transceivers

© Copyright 2000 Sipex Corporation

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GND

V+

SHUTDOWN (SD)

EN

V–

PINOUT

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GND

V+

SHUTDOWN (SD)

EN

V–

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GND

V+

SHUTDOWN (SD)

EN

V–

ers active in the shutdown mode, unless dis-

abled by the EN pin. Models with a “B” suffix

are equipped with the WakeUp function.

Models in the Series are available in 28–pin SO

(wide) and SSOP (shrink) small outline pack-

ages. Devices can be specified for commercial

(0

°C to +70°C) and industrial/extended (–40°C

to +85

°C) operating temperatures.

FEATURES…

The SP200 Series multi–channel RS-232 line

transceivers provide a variety of configurations

to fit most communication needs, especially

those applications where

±12V is not available.

All models in this Series feature low–power

CMOS construction and Sipex proprietary on-

board charge pump circuitry to generate the

±10V RS-232 voltage levels. The ability to use

0.1

µF charge pump capacitors saves board space

and reduces circuit cost. Different models within

the Series provide different driver/receiver com-

binations to match any application requirement.

The SP200, SP205, SP206, SP207B, SP211

and SP213 models feature a low–power shut-

down mode, which reduces power supply drain

to 1

µA. The WakeUp function keeps the receiv-

THEORY OF OPERATION

Charge–Pump

The charge pump is a Sipex patented design

(5,306,954) and uses a unique approach com-

pared to older less–efficient designs. The charge

pump still requires four external capacitors, but

uses a four–phase voltage shifting technique to