Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222E/SP3232E_101_031413
1
SP3222E/SP3232E
True +3.0V to +5.5V RS-232 Transceivers
The
SP3222E/SP3232E series is an RS-232 transceiver solution intended for portable or
hand-held applications such as notebook or palmtop computers. The
SP3222E/SP3232E
series has a high-efficiency, charge-pump power supply that requires only 0.1µF capaci-
tors in 3.3V operation. This charge pump allows the
SP3222E/SP3232E series to deliver
true RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The
SP3222E/SP3232E are 2-driver/2-receiver devices. This series is ideal for portable or
hand-held applications such as notebook or palmtop computers. The ESD tolerance of the
SP3222E/SP3232E devices are over +/-15kV for both Human Body Model and IEC61000-4-2
Air discharge test methods. The
SP3222E 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
■ Minimum 120kbps Data Rate Under Full
Load
■ 1µA Low Power Shutdown with
Receivers active (
SP3222E)
■ 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
15
16
17
18
5
6
7
14
13
12
SHDN
C1+
V+
C1-
C2+
C2-
EN
R1IN
GND
VCC
T1OUT
8
9
10
11
R2IN
SP3222E
T2OUT
T2IN
T1IN
R1OUT
nSOIC
R2OUT
MODEL
Power
Supplies
RS-232
Drivers
RS-232
Receivers
External
Components
Shutdown
TTL
3-State
# of
Pins
SP3222E +3.0V to +5.5V
2
2
4 Capacitors
Yes
Yes
18, 20
SP3232E +3.0V to +5.5V
2
2
4 Capacitors
No
No
16
Note: See page 6 for other pinouts
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