Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP3222EB/SP3232EB_103_081414

1

SP3222EB/SP3232EB

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

The SP3222EB/SP3232EB series is an RS-232 transceiver solution intended for portable or

hand-held applications such as notebook or laptop computers. The SP3222EB/SP3232EB

series has a high-efficiency, charge-pump power supply that requires only 0.1µF capacitors

in 3.3V operation. This charge pump allows the SP3222EB/SP3232EB series to deliver true

RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The SP3222EB/

SP3232EB are 2-driver/2-receiver devices. The ESD tolerance of the SP3222EB/SP3232EB

devices is over +/-15kV for both Human Body Model and IEC61000-4-2 Air discharge test

methods. The SP3222EB 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.

FEATURES

■ 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 (SP3222EB)

■ Interoperable with RS-232 down to a

+2.7V power source

■ Enhanced ESD Specifications:

+15kV Human Body Model

+15kV IEC61000-4-2 Air Discharge

+8kV IEC61000-4-2 Contact Discharge

DESCRIPTION

SELECTION TABLE

Now Available in Lead Free Packaging

V-

1

2

3

4

13

14

15

16

5

6

7

12

11

10

C1+

V+

C1-

C2+

C2-

R1IN

R2IN

GND

T1OUT

T2IN

8

9

SP3232EB

T1IN

R1OUT

R2OUT

T2OUT

Device

Power

Supplies

RS-232

Drivers

RS-232

Receivers

External

Components

Shutdown

TTL

3-State

# of

Pins

SP3222EB

+3.0V to

+5.5V

2

2

4 Capacitors

Yes

Yes

18, 20

SP3232EB

+3.0V to

+5.5V

2

2

4 Capacitors

No

No

16