®
SP3243
3 Driver/5 Receiver Intelligent +3.0V to +5.5V
RS-232 Transceivers
FEATURES
■
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
■
Enhanced ESD Specifications:
+15kV Human Body Model
+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
C2+ 1
C2- 2
V-
R
1
IN
R
2
IN
R
3
IN
R
4
IN
3
4
5
6
7
SP3243
28 C1+
27
26
25
24
V+
V
CC
GND
C1-
23 ONLINE
22 SHUTDOWN
21 STATUS
20
19
18
17
16
15
R
2
OUT
R
1
OUT
R
2
OUT
R
3
OUT
R
4
OUT
R
5
OUT
R
5
IN 8
T
1
OUT 9
T
2
OUT 10
T
3
OUT 11
T
3
IN 12
T
2
IN 13
T
1
IN 14
Now Available in Lead Free Packaging
DESCRIPTION
The SP3243 products are 3 driver/5 receiver RS-232 transceiver solutions intended for portable or hand-
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-pump power supply that requires only 0.1μF capacitors in 3.3V operation. This charge pump and
Sipex's driver architecture allow the SP3243 series to deliver compliant RS-232 performance from 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
Supplies
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
+3.0V to +5.5V
RS-232
Drivers
3
3
3
3
3
3
RS-232
Receivers
5
5
5
5
5
5
External
Components
4 capacitors
4 capacitors
4 capacitors
4 capacitors
4 capacitors
4 capacitors
AUTO ON-LINE
®
Circuitry
YES
YES
YES
YES
YES
YES
TTL 3-
State
YES
YES
YES
YES
YES
YES
# of
Pins
28
28
28
28
28
28
Gauranteed
Data Rate
120
120
250
250
1000
1000
ESD
Rating
2kV
15kV
2kV
15kV
2kV
15kV
SP3243
SP3243E
SP3243B
SP3243EB
SP3243U
SP3243EU
Date:
2/05/06
SP3243 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2006 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, ...........-0.3V to Vcc +6.0V
RxIN...................................................................+15V
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 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 MLPQ (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,
ONLINE, SHUTDOWN
TxIN, 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:
2/05/06
SP3243 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2006 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 (U)
(H)
(B)
(-)
Receiver Propagation Delay
t
PHL
t
PLH
Receiver Output Enable Time
Receiver Output Disable Time
Driver Skew (E, EB)
(EU)
Receiver Skew
Transition-Region Slew Rate (U)
(EB)
6
1000
460
250
120
0.15
0.15
200
200
100
50
50
90
30
500
100
Kbps
R
L
= 3KΩ, C
L
= 250pF, one driver active
R
L
= 3KΩ, C
L
= 1000pF, one driver active
R
L
= 3KΩ, C
L
= 1000pF, one driver active.
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
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
350
0.2
3
-15
0.6
0.8
1.2
1.5
1.5
1.8
0.3
5
7
0.4
2.4
2.4
15
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
AUTO ON-LINE
®
CIRCUITRY CHARACTERISTICS (ONLINE = GND, SHUTDOWN = V
CC
) 25°C
30
μS
Figure 20
μs
ns
ns
ns
ns
V/μs
Date:
2/05/06
SP3243 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2006 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
Figure 2. Transmitter Output Voltage VS. Supply
Voltage for the SP3243EU
6
40
Supply Current (mA)
TxOUT +
35
30
25
20
15
10
5
0
0
1000
2000
3000
4000
5000
1 Transmitter at full Data Rate
2 Transmitters at 15.5 Kbps
All Transmitters loades 3K + Load Cap
250Kbps
120Kbps
20Kbps
Transmitter Output
Voltage (V)
4
2
0
-2
-4
-6
2.7
3
3.5
TxOUT -
4
4.5
5
Load Capacitance (pF)
Supply Voltage (V
DC
)
Figure 3. Transmitter Output Voltage VS. Load
Capacitance for the SP3243EU
Figure 4. Supply Current VS. Load Capacitance for the
SP3243EU
25
6
TxOUT +
Supply Current (mA)
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 5. Supply Current VS. Supply Voltage for the
SP3243EU
Figure 6. Transmitter Output Voltage VS. Supply
Voltage for the SP3243EU
Date:
2/05/06
SP3243 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2006 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
4
TxOUT +
25
20
15
10
5
0
1 Transmitter at 250Kbps
2 Transmitter at 15.6Kbps
All drivers loaded 3K + Load Cap
- Slew
+ Slew
Transmitter Output
Voltage (V)
2
0
-2
-4
-6
0
TxOUT -
Slew rate (V/μs)
1000
2000
3000
4000
5000
0
500
1000
2000
3000
4000
5000
Load Capacitance (pF)
Load Capacitance (pF)
Figure 7. Transmitter Output Voltage VS. Load
Capacitance
Figure 8. Slew Rate VS. Load Capacitance
40
25
Supply Current (mA)
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
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
250Kbps
120Kbps
20Kbps
Figure 9. Supply Current VS. Load Capacitance
Figure 10. Supply Current VS. Supply Voltage
Date:
2/05/06
SP3243 +3.0V to +5.5V RS-232 Transceivers
© Copyright 2006 Sipex Corporation
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