®
SP3223U/3243U
High Speed Intelligent +3.0V to +5.5V
RS-232 Transceivers
■
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
■
AUTO ON-LINE
®
circuitry automatically
wakes up from a 1µA shutdown
■
Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of V
CC
Variations
■
ESD Specifications:
+2kV Human Body Model
■
1000 Kbps minimum transmission rate
■
Ideal for High Speed RS-232 Applications
EN
C1+
V+
C1-
C2+
C2-
V-
T
2
OUT
R
2
IN
1
2
3
4
5
6
7
8
9
SP3223U
20 SHUTDOWN
19
18
17
16
15
14
V
CC
GND
T
1
OUT
R
1
IN
R
1
OUT
ONLINE
13 T
1
IN
12
11
T
2
IN
STATUS
R
2
OUT 10
Now Available in Lead Free Packaging
DESCRIPTION
The SP3223U and SP3243U products are RS-232 transceiver solutions intended for portable or hand-
held applications such as notebook and palmtop computers. The "U" series is based on Sipex's SP3223/
SP3243 series and has been enhanced for high speed. The data rate is improved to 1000kbps, easily
meeting the demands of high speed RS-232 applications. The SP3223U and SP3243U 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 SP3223U/SP3243U series to deliver compliant RS-
232 performance from a single power supply ranging from +3.0V to +5.5V. The SP3223U is a 2-driver/
2-receiver device, and the SP3243U is a 3-driver/5-receiver device, ideal for laptop/notebook computer
and PDA applications. The SP3243U includes one complementary receiver that remains alert to
monitor an external device's Ring Indicate signal while the device is shutdown.
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
SP3223U
SP3243U
Power Supplies
+3.0V to +5.5V
+3.0V to +5.5V
RS-232
Drivers
2
3
RS-232
Receivers
2
5
External
Components
4 capacitors
4 capacitors
Auto-Online
Circuitry
YES
YES
TTL 3-State
YES
YES
No. of
Pins
20
28
Applicable U.S. Patents - 5,306,954; and other patents pending.
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation
of the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may
affect reliability and cause permanent damage to the
device.
V
CC
.......................................................-0.3V to +6.0V
V+ (NOTE 1).......................................-0.3V to +7.0V
V- (NOTE 1)........................................+0.3V to -7.0V
V+ + |V-| (NOTE 1)...........................................+13V
I
CC
(DC V
CC
or GND current).........................+100mA
Input Voltages
TxIN, ONLINE,
SHUTDOWN, EN (SP3223U)...........-0.3V to +6.0V
RxIN...................................................................+25V
Output Voltages
TxOUT.............................................................+13.2V
RxOUT, STATUS.......................-0.3V to (V
CC
+ 0.3V)
Short-Circuit Duration
TxOUT.....................................................Continuous
Storage Temperature......................-65°C to +150°C
Power Dissipation per package
20-pin PDIP (derate 16.0mW/
o
C above+70
o
C).....1300mW
20-pin SSOP (derate 9.25mW/
o
C above +70
o
C)....750mW
20-pin TSSOP (derate 11.1mW/
o
C above +70
o
C)..900mW
28-pin SOIC (derate 12.7mW/
o
C above +70
o
C)....1000mW
28-pin SSOP (derate 11.2mW/
o
C above +70
o
C).....900mW
28-pin TSSOP (derate 13.2mW/
o
C above +70
o
C)......1059mW
32-pin QFN (derate 29.4mW/
o
C above +70
o
C)........2352mW
NOTE 1:
V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.5V with T
AMB
= T
MIN
to T
MAX
,
C1 - C4 = 0.1µF. Typical values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25°C.
PARAMETER
DC CHARACTERISTICS
Supply Current,AUTO ON-LINE
®
1.0
10
µA
All RxIN open, ONLINE = GND,
SHUTDOWN = V
CC
, V
CC
= +3.3V,
T
AMB
= +25°C, TxIN = GND or V
CC
SHUTDOWN = GND, V
CC
= +3.3V,
T
AMB
= +25°C, TxIN = V
CC
or GND
ONLINE = SHUTDOWN = V
CC
, no load,
V
CC
= +3.3V, T
AMB
= +25°C, TxIN = GND or V
CC
V
CC
= +3.3V or +5.0V, TxIN, EN(SP3223U),
ONLINE, SHUTDOWN
TxIN, EN, ONLINE, SHUTDOWN,
T
AMB
= +25°C, V
IN
= 0V to V
CC
Receivers disabled, V
OUT
= 0V to V
CC
I
OUT
= 1.6mA
I
OUT
= -1.0mA
All driver outputs loaded with 3KΩ to GND,
T
AMB
= +25°C
V
CC
= V+ = V- = 0V, V
OUT
=
±2V
V
OUT
= 0V
V
CC
= 0V or 3.0V to 5.5V, V
OUT
=
±12V,
Drivers disabled
MIN.
TYP.
MAX. UNITS CONDITIONS
Supply Current, Shutdown
Supply Current,
AUTO ON-LINE
®
Disabled
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold
LOW
HIGH
Input Leakage Current
Output Leakage Current
Output Voltage LOW
Output Voltage HIGH
DRIVER OUTPUTS
Output Voltage Swing
Output Resistance
Output Short-Circuit Current
Output Leakage Current
±5.0
300
1.0
0.3
10
1.0
µA
mA
0.8
2.4
±0.01
±0.05
V
CC
- 0.6 V
CC
- 0.1
±5.4
±1.0
±10
0.4
V
V
µA
µA
V
V
V
Ω
±35
±60
±25
mA
µA
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
2
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.5V with T
AMB
= T
MIN
to T
MAX
,
C1 - C4 = 0.1µF. Typical values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25°C.
PARAMETER
RECEIVER INPUTS
Input Voltage Range
Input Threshold LOW
Input Threshold LOW
Input Threshold HIGH
Input Threshold HIGH
Input Hysteresis
Input Resistance
STATUS Output Voltage LOW
STATUS Output Voltage HIGH
Receiver Threshold to Drivers
Enabled (t
ONLINE
)
Receiver Positive or Negative
Threshold to STATUS HIGH
(t
STSH
)
Receiver Positive or Negative
Threshold to STATUS LOW
(t
STSL
)
TIMING CHARACTERISTICS
Maximum Data Rate
Receiver Propagation Delay
t
PHL
t
PLH
Receiver Output Enable Time
Receiver Output Disable Time
Driver Skew
Receiver Skew
Transition-Region Slew Rate
1000
0.15
0.15
200
200
100
50
90
Kbps
µs
ns
ns
ns
ns
V/µs
R
L
= 3KΩ, C
L
= 250pF, one driver active
Receiver input to Receiver output, C
L
= 150pF
Normal operation
Normal operation
| t
PHL
- t
PLH
|
| t
PHL
- t
PLH
|
V
CC
= 3.3V, R
L
= 3KΩ, T
AMB
= 25°C,
measurements taken from -3.0V to +3.0V or
+3.0V to -3.0V
V
CC
- 0.6
200
0.5
3
-25
0.6
0.8
1.2
1.5
1.5
1.8
0.3
5
7
0.4
2.4
2.4
25
V
V
V
V
V
V
kΩ
V
V
µS
µS
I
OUT
= 1.6mA
I
OUT
= -1.0mA
Figure 19
Figure 19
V
CC
= 3.3V
V
CC
= 5.0V
V
CC
= 3.3V
V
CC
= 5.0V
MIN.
TYP.
MAX. UNITS CONDITIONS
AUTO ON-LINE
®
CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = V
CC
)
20
µS
Figure 19
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 1000kbps data rate, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
200
Transmitter Output
Voltage (V)
6
4
2
0
-2
-4
-6
2.7
3
3.5
4
Supply Voltage (V)
4.5
5
1Driver at 1Mbps
Other Drivers at 62.5Kbps
All Drivers Loaded with 3K // 250pF
150
Skew (ns)
100
50
0
0
250
500
1000
1500
Load Capacitance (pF)
2000
T1 at 500Kbps
T2 at 31.2Kbps
All TX loaded 3K // CLoad
Figure 1. Transmitter Skew VS. Load Capacitance for
the SP3223U / SP3243U
Figure 2. Transmitter Output Voltage VS. Supply
Voltage for the SP3223U
6
35
Supply Current (mA)
Transmitter
Output Voltage (V)
4
2
0
-2
-4
-6
0
250
500
1000
Load Capacitance (pF)
1500
T1 at 1Mbps
T2 at 62.5Kbps
30
25
20
15
10
5
0
0
250
500
1000
Load Capacitance (pF)
1500
T1 at 1Mbps
T2 at 62.5Kbps
Figure 3. Transmitter Output Voltage VS. Load
Capacitance for the SP3223U
Figure 4. Supply Current VS. Load Capacitance for the
SP3223U
20
6
Transmitter Output
Voltage (V)
SupplyCurrent (mA)
4
2
0
-2
-4
-6
2.7
3
3.5
4
Supply Voltage (V)
4.5
5
T1 at 1Mbps
T2 at 62.5Kbps
All Drivers loaded
with 3K//250pF
15
10
5
0
2.7
3
3.5
4
Supply Voltage (V)
4.5
5
T1 at 1Mbps
T2 at 62.5Kbps
All Drivers loaded
with 3K//250pF
Figure 5. Supply Current VS. Supply Voltage for the
SP3223U
Figure 6. Transmitter Output Voltage VS. Supply
Voltage for the SP3223U
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 1000kbps data rate, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
6
120
1Mbps
Transmitter
Output Voltage (V)
2
0
-2
-4
-6
0
250
500
1000
1500
Load Capacitance (pF)
2000
1Mbps
2Mbps
1.5Mbps
1 TX at full data rate
2 TX’s at1/16 data rate
Slew Rate (V /
µs)
4
2Mbps
1.5Mbps
100
80
Slew +
1 TX at 1Mbps
2 TX’s at 62.5Kbps
All TX loaded 3K // CLoad
60
40
20
0
0
250
500
1000
1500
Load Capacitance (pF)
2000
Slew -
Figure 7. Transmitter Output Voltage VS. Load
Capacitance for the SP3243U
Figure 8. Slew Rate VS. Load Capacitance for the
SP3243U
50
SupplyCurrent (mA)
Supply Current (mA)
1.5 Mbps
1 Mbps
2 Mbps
30
25
20
15
10
5
0
2.7
3
3.5
4
Supply Voltage (V)
4.5
5
1 Driver at 1Mbps
Other Drivers at 62.5Kbps
All Drivers Loaded with 3K // 250pF
40
30
20
10
0
0
250
500
1000
Load Capacitance (pF)
1 TX at full data rate
2 TX’s at 1/16 data rate
All TX loaded 3K // CLoad
1500
Figure 9. Supply Current VS. Load Capacitance for the
SP3243U
Figure 10. Supply Current VS. Supply Voltage for the
SP3243U
Date: 5/25/04
SP3223U/3243U +3.0V to +5.5V RS-232 Transceivers
© Copyright 2004 Sipex Corporation
5
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