®
SP3223B/3243B
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
■
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
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 0.1µF
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 1µA.
SELECTION TABLE
Device
SP3223B
SP3243B
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 ON-LINE
®
Circuitry
YES
YES
TTL 3-State
YES
YES
No. of
Pins
20
28
Applicable U.S. Patents - 5,306,954; and other patents pending.
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
© Copyright 2003 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 (SP3223BE) .......... -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
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
NOTE 1:
V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
SPSCIFICATIONS
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 = 0.1µF. Typical values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25°C.
PARAMETER
DC CHARACTERISTICS
Supply Current,
AUTO ON-LINE
®
Supply Current, Shutdown
1.0
10
µA
All RxIN open, ONLINE = GND,
SHUTDOWN = V
CC
, TxIN = V
CC
or
GND,V
CC
= +3.3V, T
AMB
= +25°C
SHUTDOWN = GND,
V
CC
= +3.3V, T
AMB
= +25°C,
TxIN = V
CC
or GND
ONLINE = SHUTDOWN = V
CC
,
TxIN = V
CC
or GND,
no load, V
CC
= +3.3V, T
AMB
= +25°C
V
CC
= +3.3V or +5.0V, TxIN,
EN (SP3223B), ONLINE,
SHUTDOWN
TxIN, EN (SP3223B), ONLINE,
T
AMB
= +25°C, V
IN
= 0V to V
CC
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
±35
±60
±25
±5.4
V
Ω
mA
µA
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
© Copyright 2003 Sipex Corporation
MIN.
TYP.
MAX. UNITS CONDITIONS
1.0
10
µA
Supply Current,
AUTO ON-LINE
®
Disabled
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold
LOW
HIGH
Input Leakage Current
SHUTDOWN,
0.3
1.0
mA
0.8
2.4
±0.01
±1.0
V
V
µA
±0.05
±10
0.4
µA
V
V
Receivers disabled, V
OUT
= 0V to
V
CC
I
OUT
= 1.6mA
I
OUT
= -1.0mA
V
CC
- 0.6
V
CC
- 0.1
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
2
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 = 0.1µF. 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
250
kbps
R
L
= 3KΩ, C
L
= 1000pF,
one driver active
Receiver input to Receiver output,
C
L
= 150pF
Normal operation
Normal operation
| t
PHL
- t
PLH
|, T
AMB
= 25°C
| 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 20
Figure 20
V
CC
= 3.3V
V
CC
= 5.0V
V
CC
= 3.3V
V
CC
= 5.0V
MIN.
TYP.
MAX. UNITS CONDITIONS
SPECIFICATIONS (continued)
AUTO ON-LINE
®
CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = V
CC
)
20
µs
Figure 20
0.15
0.15
200
200
100
50
30
µs
ns
ns
ns
ns
V/µs
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 250kbps data rate, all drivers
loaded with 3KΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
6
Transmitter Output
Voltage (V
DC
)
30
TxOUT +
4
2
0
-2
-4
-6
0
25
Slew rate (V/µs)
- Slew
+ Slew
20
15
10
5
0
1 Transmitter at 250Kbps
1 Transmitter at 15.6Kbps
All drivers loaded 3K + Load Cap
TxOUT -
1000
2000
3000
4000
5000
0
500
1000
2000
3000
4000
5000
Load Capacitance (pF)
Load Capacitance (pF)
Figure 1. Transmitter Output Voltage VS. Load
Capacitance for the SP3223B
Figure 2. Slew Rate VS. Load Capacitance for the
SP3223B
35
20
Supply Current (mA)
30
25
250Kbps
125Kbps
15
I
CC
(mA)
20
15
10
5
0
0
1000
2000
10
1 Transmitter at 250Kbps
2 Transmitters at 15.6Kbps
All drivers loaded with 3K // 1000pF
20Kbps
1 Transmitter at 250Kbps
1 Transmitter at 15.6Kbps
All drivers loaded 3K + Load Cap
5
3000
4000
5000
0
2.7
3
3.5
4
4.5
5
Load Capacitance (pF)
Supply Voltage (V
DC
)
Figure 3. Supply Current VS. Load Capacitance when
Transmitting Data for the SP3223B
Figure 4. Supply Current VS. Supply Voltage for
the SP3243B
6
TxOUT +
6
4
Transmitter Output
Voltage (V)
TxOUT +
Transmitter Output
Voltage (V
DC
)
4
2
0
-2
-4
-6
2.7
3
3.5
TxOUT -
2
0
-2
-4
-6
0
TxOUT -
4
4.5
5
1000
2000
3000
4000
5000
Supply Voltage (V
DC
)
Load Capacitance (pF)
Figure 5. Transmitter Output Voltage VS. Supply
Voltage for the SP3243B
Figure 6. Transmitter Output Voltage VS. Load
Capacitance for the SP3243B
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
4
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 250kbps data rate, all drivers
loaded with 3KΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
25
20
15
10
5
0
1 Transmitter at 250Kbps
2 Transmitter at 15.6Kbps
All drivers loaded 3K + Load Cap
- Slew
+ Slew
40
Supply Current (mA)
35
30
25
20
15
10
5
0
0
1000
2000
3000
4000
5000
Load Capacitance (pF)
1 Transmitter at full Data Rate
2 Transmitters at 15.5 Kbps
All Transmitters loades 3K + Load Cap
250Kbps
120Kbps
20Kbps
Slew rate (V/µs)
0
500
1000
2000
3000
4000
5000
Load Capacitance (pF)
Figure 7. Slew Rate VS. Load Capacitance for the
SP3243B
Figure 8. Supply Current VS. Load Capacitance when
Transmitting Data for the SP3243B
25
Supply Current (mA)
6
TxOUT +
Transmitter Output
Voltage (V)
20
15
10
5
0
2.7
3
3.5
4
4.5
5
Supply Voltage (V
DC
)
1 Transmitter at 250Kbps
2 Transmitters at 15.6Kbps
All drivers loaded with 3K // 1000pF
4
2
0
-2
-4
-6
2.7
3
3.5
TxOUT -
4
4.5
5
Supply Voltage (V
DC
)
Figure 9. Supply Current VS. Supply Voltage for the
SP3243B
Figure 10. Transmitter Output Voltage VS. Supply
Voltage for the SP3243B
Rev. 6/30/03
SP3223B/3243B +3.0V to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
5
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