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SP3222B

True +3.0V to +5.5V RS-232 Transceivers

Signal Processing Technologies 

®

SP3222B/3232B

True +3.0V to +5.5V RS-232 Transceivers

■ Meets true EIA/TIA-232-F Standards

from a +3.0V to +5.5V power supply

■ 250kbps Transmission Rate Under Load

■ 1µA Low-Power Shutdown with Receivers

Active (SP3222B)

■ Interoperable with RS-232 down to +2.7V

power source

■ ESD Specifications:

±2kV Human Body Model

DESCRIPTION

The SP3222B/3232B series is an RS-232 transceiver solution intended for portable or hand-

held applications such as notebook or palmtop computers. The SP3222B/3232B series has

a high-efficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V

operation. This charge pump allows the SP3222B/3232B series to deliver true RS-232

performance from a single power supply ranging from +3.0V to +5.5V. The ESD tolerance

of the SP3222B/3232B devices are over ±15kV for both Human Body Model and IEC1000-

4-2 Air discharge test methods. The SP3222B device has a low-power shutdown mode where

the devices' driver outputs and charge pumps are disabled. During shutdown, the supply

current falls to less than 1µA.

SELECTION TABLE

MODEL

SP3222B

SP3232B

Power Supplies

+3.0V to +5.5V

+3.0V to +5.5V

RS-232

Drivers

2

2

RS-232

External

Receivers Components

2

4

2

4

Shutdown

Yes

No

TTL No. of

3-State Pins

Yes 18, 20

No

16

Rev. 6/30/03

SP3222B/3232B True +3.0 to +5.5V RS-232 Transceivers

1

© Copyright 2003 Sipex Corporation

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