®
SP3223EB/3243EB
Intelligent +3.0V to +5.5V RS-232 Transceivers
■ Meets true EIA/TIA-232-F Standards
EN
20
1
2
3
4
5
6
7
SHUTDOWN
from a +3.0V to +5.5V power supply
■ Interoperable with EIA/TIA-232 and
adheres to EIA/TIA-562 down to a +2.7V
power source
VCC
19
C1+
V+
GND
18
C1-
T1OUT
R1IN
17
SP3223EB 16
15
■ AUTO ON-LINE® circuitry automatically
wakes up from a 1µA shutdown
■ Minimum 250kbps data rate under load
■ Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of VCC
Variations
C2+
C2-
V-
R1OUT
14
13
ONLINE
T1IN
T2OUT
R2IN
8
9
■ Enhanced ESD Specifications:
+15kV Human Body Model
12 T2IN
10
R2OUT
STATUS
11
+15kV IEC1000-4-2 Air Discharge
+8kV IEC1000-4-2 Contact Discharge
Now Available in Lead Free Packaging
DESCRIPTION
The SP3223EB and SP3243EB products are RS-232 transceiver solutions intended for
portableorhand-heldapplicationssuchasnotebookandpalmtopcomputers.TheSP3223EB
and SP3243EB use an internal high-efficiency, charge-pump power supply that requires only
0.1µF capacitors in 3.3V operation. This charge pump and Sipex's driver architecture allow
the SP3223EB/3243EB series to deliver compliant RS-232 performance from a single power
supply ranging from +3.0V to +5.5V. The SP3223EB is a 2-driver/2-receiver device, and the
SP3243EB is a 3-driver/5-receiver device ideal for laptop/notebook computer and PDA
applications. The SP3243EB includes one complementary receiver that remains alert to
monitor an external device's Ring Indicate signal while the device is shutdown.
TheAUTOON-LINE®featureallowsthedevicetoautomatically"wake-up"duringashutdown
statewhenanRS-232cableisconnectedandaconnectedperipheralisturnedon. Otherwise,
the device automatically shuts itself down drawing less than 1µA.
SELECTION TABLE
Device
Power Supplies RS-232
RS-232
External
AUTO ON-LINE® TTL 3-State
Circuitry
No. of
Pins
Drivers Receivers Components
SP3223EB
SP3243EB
+3.0V to +5.5V
+3.0V to +5.5V
2
3
2
5
4 capacitors
4 capacitors
YES
YES
YES
YES
20
28
Applicable U.S. Patents - 5,306,954; and other patents pending.
Date: 6/2/04
SP3223EB/3243EB +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
1