1
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
Copyright 2003 Sipex Corporation
SP3223B/3243B
Intelligent +3.0V to +5.5V RS-232 Transceivers
The SP3223B and SP3243B products are RS-232 transceiver solutions intended for portable
or hand-held applications such as notebook and palmtop computers. The SP3223B and
SP3243B use an internal high-efficiency, charge-pump power supply that requires only 0.1
F
capacitors in 3.3V operation. This charge pump and Sipex's driver architecture allow the
SP3223B/3243B series to deliver compliant RS-232 performance from a single power supply
ranging from +3.0V to +5.5V. The SP3223B is a 2-driver/2-receiver device, and the SP3243B
is a 3-driver/5-receiver device ideal for laptop/notebook computer and PDA applications. The
SP3243B 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 1
A.
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 1
A shutdown
Minimum 250kbps data rate under load
Regulated Charge Pump Yields Stable
RS-232 Outputs Regardless of V
CC
Variations
ESD Specifications:
+2kV Human Body Model
DESCRIPTION
SELECTION TABLE
Applicable U.S. Patents - 5,306,954; and other patents pending.
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2
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
Copyright 2003 Sipex Corporation
2
PARAMETER
MIN.
TYP.
MAX. UNITS CONDITIONS
DC CHARACTERISTICS
Supply Current,
1.0
10
A
All RxIN open, ONLINE = GND,
AUTO ON-LINE
SHUTDOWN = V
CC
, TxIN = V
CC
or
GND,V
CC
= +3.3V, T
AMB
= +25
C
Supply Current, Shutdown
1.0
10
A
SHUTDOWN = GND,
V
CC
= +3.3V, T
AMB
= +25
C,
TxIN = V
CC
or GND
Supply Current,
0.3
1.0
mA
ONLINE = SHUTDOWN = V
CC
,
AUTO ON-LINE
Disabled
TxIN = V
CC
or GND,
no load, V
CC
= +3.3V, T
AMB
= +25
C
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold
V
CC
= +3.3V or +5.0V, TxIN,
LOW
0.8
V
EN (SP3223B), ONLINE,
HIGH
2.4
V
SHUTDOWN
Input Leakage Current
0.01
1.0
A
TxIN, EN (SP3223B), ONLINE,
SHUTDOWN,
T
AMB
= +25
C, V
IN
= 0V to V
CC
Output Leakage Current
0.05
10
A
Receivers disabled, V
OUT
= 0V to
V
CC
Output Voltage LOW
0.4
V
I
OUT
= 1.6mA
Output Voltage HIGH
V
CC
- 0.6
V
CC
- 0.1
V
I
OUT
= -1.0mA
DRIVER OUTPUTS
Output Voltage Swing
5.0
5.4
V
All driver outputs loaded with 3K
to GND, T
AMB
= +25
C
Output Resistance
300
V
CC
= V+ = V- = 0V, V
OUT
=
2V
Output Short-Circuit Current
35
60
mA
V
OUT
= 0V
Output Leakage Current
25
A
V
CC
= 0V or 3.0V to 5.5V,
V
OUT
=
12V, Drivers disabled
NOTE 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
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 (SP3223BE) .......... -0.3V to +6.0V
RxIN .................................................................. +25V
Output Voltages
TxOUT ........................................................... +13.2V
RxOUT, STATUS ..................... -0.3V to (V
CC
+ 0.3V)
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.5V with T
AMB
= T
MIN
to T
MAX
,
C1 - 4 = 0.1
F. Typical values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25
C.
SPSCIFICATIONS
Short-Circuit Duration
TxOUT .................................................... Continuous
Storage Temperature ...................... -65
C to +150
C
Power Dissipation per package
28-pin PDIP
(derate 16.0mW/
C above+70
C) ...................... 1300mW
20-pin SSOP
(derate 9.25mW/
C above +70
C) ...................... 750mW
20-pin TSSOP
(derate 11.1mW/
C above +70
C) ....................... 900mW
28-pin SOIC
(derate 12.7mW/
C above +70
C) .................... 1000mW
28-pin SSOP
(derate 11.2mW/
C above +70
C) ...................... 900mW
28-pin TSSOP
(derate 11.1mW/
C above +70
C) ....................... 900mW
32-pin MLPQ
3
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
Copyright 2003 Sipex Corporation
SPECIFICATIONS (continued)
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.5V with T
AMB
= T
MIN
to T
MAX
,
C1 - 4 = 0.1
F. Typical values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25
C.
PARAMETER
MIN.
TYP.
MAX. UNITS CONDITIONS
RECEIVER INPUTS
Input Voltage Range
-25
25
V
Input Threshold LOW
0.6
1.2
V
V
CC
= 3.3V
Input Threshold LOW
0.8
1.5
V
V
CC
= 5.0V
Input Threshold HIGH
1.5
2.4
V
V
CC
= 3.3V
Input Threshold HIGH
1.8
2.4
V
V
CC
= 5.0V
Input Hysteresis
0.3
V
Input Resistance
3
5
7
k
AUTO ON-LINE
CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = V
CC
)
STATUS Output Voltage LOW
0.4
V
I
OUT
= 1.6mA
STATUS Output Voltage HIGH
V
CC
- 0.6
V
I
OUT
= -1.0mA
Receiver Threshold to Drivers
Enabled (t
ONLINE
)
200
s
Figure 20
Receiver Positive or Negative
0.5
s
Figure 20
Threshold to STATUS HIGH
(t
STSH
)
Receiver Positive or Negative
20
s
Figure 20
Threshold to STATUS LOW
(t
STSL
)
TIMING CHARACTERISTICS
Maximum Data Rate
250
kbps
R
L
= 3K
, C
L
= 1000pF,
one driver active
Receiver Propagation Delay
t
PHL
0.15
s
Receiver input to Receiver output,
t
PLH
0.15
C
L
= 150pF
Receiver Output Enable Time
200
ns
Normal operation
Receiver Output Disable Time
200
ns
Normal operation
Driver Skew
100
ns
| t
PHL
- t
PLH
|, T
AMB
= 25
C
Receiver Skew
50
ns
| t
PHL
- t
PLH
|
Transition-Region Slew Rate
30
V/
s
V
CC
= 3.3V, R
L
= 3K
, T
AMB
= 25
C,
measurements taken from -3.0V to
+3.0V or +3.0V to -3.0V
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
Copyright 2003 Sipex Corporation
4
Figure 1. Transmitter Output Voltage VS. Load
Capacitance for the SP3223B
Figure 2. Slew Rate VS. Load Capacitance for the
SP3223B
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 250kbps data rate, all drivers
loaded with 3K
, 0.1F charge pump capacitors, and T
AMB
= +25
C.
30
25
20
15
10
5
0
0
500
1000
2000
3000
4000
5000
Slew rate (V/
s)
Load Capacitance (pF)
- Slew
+ Slew
1 Transmitter at 250Kbps
1 Transmitter at 15.6Kbps
All drivers loaded 3K + Load Cap
35
30
25
20
15
10
5
0
I
CC
(mA)
Load Capacitance (pF)
0
1000
2000
3000
4000
5000
250Kbps
125Kbps
20Kbps
1 Transmitter at 250Kbps
1 Transmitter at 15.6Kbps
All drivers loaded 3K + Load Cap
Figure 3. Supply Current VS. Load Capacitance when
Transmitting Data for the SP3223B
Figure 4. Supply Current VS. Supply Voltage for
the SP3243B
20
15
10
5
0
2.7
3
3.5
4
4.5
5
Supply Voltage (V
DC
)
Supply Current (mA)
1 Transmitter at 250Kbps
2 Transmitters at 15.6Kbps
All drivers loaded with 3K // 1000pF
Figure 5. Transmitter Output Voltage VS. Supply
Voltage for the SP3243B
Figure 6. Transmitter Output Voltage VS. Load
Capacitance for the SP3243B
6
4
2
0
-2
-4
-6
0
1000
2000
3000
4000
5000
TxOUT +
TxOUT -
T
ransmitter Output
V
oltage (V
DC
)
Load Capacitance (pF)
6
4
2
0
-2
-4
-6
0
1000
2000
3000
4000
5000
TxOUT +
TxOUT -
T
ransmitter Output
V
oltage (V)
Load Capacitance (pF)
6
4
2
0
-2
-4
-6
2.7
3
3.5
4
4.5
5
Supply Voltage (V
DC
)
T
ransmitter Output
V
oltage (V
DC
)
TxOUT -
TxOUT +
5
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
Copyright 2003 Sipex Corporation
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 250kbps data rate, all drivers
loaded with 3K
, 0.1F charge pump capacitors, and T
AMB
= +25
C.
Figure 7. Slew Rate VS. Load Capacitance for the
SP3243B
25
20
15
10
5
0
0
500
1000
2000
3000
4000
5000
Slew rate (V/
s)
Load Capacitance (pF)
- Slew
+ Slew
1 Transmitter at 250Kbps
2 Transmitter at 15.6Kbps
All drivers loaded 3K + Load Cap
Figure 8. Supply Current VS. Load Capacitance when
Transmitting Data for the SP3243B
40
35
30
25
20
15
10
5
0
Supply Current
(mA)
Load Capacitance (pF)
0
1000
2000
3000
4000
5000
250Kbps
120Kbps
20Kbps
1 Transmitter at full Data Rate
2 Transmitters at 15.5 Kbps
All Transmitters loades 3K + Load Cap
6
4
2
0
-2
-4
-6
2.7
3
3.5
4
4.5
5
Supply Voltage (V
DC
)
T
ransmitter Output
V
oltage (V)
TxOUT -
TxOUT +
Figure 9. Supply Current VS. Supply Voltage for the
SP3243B
Figure 10. Transmitter Output Voltage VS. Supply
Voltage for the SP3243B
25
20
15
10
5
0
2.7
3
3.5
4
4.5
5
Supply Voltage (V
DC
)
Supply Current (mA)
1 Transmitter at 250Kbps
2 Transmitters at 15.6Kbps
All drivers loaded with 3K // 1000pF
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