®
SP3243
3 Driver/5 Receiver Intelligent +3.0V to +5.5V
RS-232 Transceivers
FEATURES
1
2
3
4
5
6
7
28
27
26
C2+
C2-
C1+
V+
■ Meets true EIA/TIA-232-F Standards
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
V
CC
V-
25 GND
R1IN
R2IN
R3IN
24
C1-
®
SP3243
■ AUTO ON-LINE circuitry automatically
23
ONLINE
wakes up from a 1μA shutdown
■ Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of VCC
Variations
22
21
20
19
R4IN
SHUTDOWN
STATUS
R2OUT
8
9
R5IN
T1OUT
T2OUT
T3OUT
10
11
R1OUT
■ Enhanced ESD Specifications:
+15kV Human Body Model
18 R2OUT
T3IN 12
17
16
15
R3OUT
R4OUT
R5OUT
+15kV IEC1000-4-2 Air Discharge
+8kV IEC1000-4-2 Contact Discharge
■ 250 Kbps min. transmission rate (EB)
■ 1000 Kbps min. transmission rate (EU)
■ Ideal for High Speed RS-232 Applications
13
14
T2IN
T1IN
Now Available in Lead Free Packaging
DESCRIPTION
TheSP3243productsare3driver/5receiverRS-232transceiversolutionsintendedforportableorhand-
held applications such as notebook and palmtop computers. The SP3243 includes one complementary
receiver that remains alert to monitor an external device's Ring Indicate signal while the device is
shutdown. The SP3243E and EB devices feature slew-rate limited outputs for reduced crosstalk and
EMI. The "U" and "H" series are optimized for high speed with data rates up to 1Mbps, easily meeting
the demands of high speed RS-232 applications. The SP3243 series uses an internal high-efficiency,
charge-pumppowersupplythatrequiresonly0.1μFcapacitorsin3.3Voperation. Thischargepumpand
Sipex's driver architectureallowtheSP3243seriestodelivercompliantRS-232performancefrom a single
power supply ranging from +3.0V to +5.5V. The AUTO ON-LINE® feature allows the device to
automatically "wake-up" during a shutdown state when an RS-232 cable is connected and a connected
peripheral is turned on. Otherwise, the device automatically shuts itself down drawing less than 1μA.
SELECTION TABLE
Device
Power
RS-232
RS-232
External
TTL 3-
State
# of Gauranteed ESD
AUTO ON-LINE®
Circuitry
Supplies
Drivers Receivers Components
Pins
Data Rate Rating
SP3243
SP3243E
SP3243B
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
3
3
3
3
3
3
5
5
5
5
5
5
4 capacitors
4 capacitors
4 capacitors
4 capacitors
4 capacitors
4 capacitors
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
28
28
28
28
28
28
120
120
2kV
15kV
2kV
250
SP3243EB +3.0V to +5.5V
SP3243U +3.0V to +5.5V
SP3243EU +3.0V to +5.5V
250
15kV
2kV
1000
1000
15kV
Date: 2/05/06
SP3243 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2006 Sipex Corporation
1