SP3232EH
3.3V, 460 kbps RS-232 Transceiver
FEATURES
■ Meets true EIA/TIA-232-F Standards
from a +3.0V to +5.5V power supply
■ Interoperable with RS-232 down to a
+2.7V power source
■ Enhanced ESD Specifications:
+15kV Human Body Model
+15kV IEC61000-4-2 Air Discharge
+8kV IEC61000-4-2 Contact Discharge
■ 460kbps Minimum Transmission Rate
■ Ideal for Handheld, Battery Operated
Applications
C1+ 1
V+ 2
C1- 3
C2+ 4
C2- 5
V- 6
T2OUT 7
R2IN 8
16 V
CC
15 GND
14 T1OUT
SP3232EH 13 R1IN
12 R1OUT
11 T1IN
10 T2IN
9 R2OUT
Now Available in Lead Free Packaging
The
SP3232EH
is a 2 driver / 2 receiver RS-232 transceiver solution intended for portable or
hand-held applications such as notebook or laptop computers. The data transmission rate of
460kbps can meet the demands of high speed RS-232 applications. This device has a high-
efficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V operation.
This charge pump allows the
SP3232EH
device to deliver true RS-232 performance from
a single power supply ranging from +3.0V to +5.5V. The ESD tolerance of the
SP3232EH
device exceeds +/-15kV for both Human Body Model and IEC61000-4-2 Air discharge test
methods.
DESCRIPTION
SELECTION TABLE
Device
Power
Supplies
RS-232
Drivers
2
RS-232
Receivers
2
External
Components
4
Shutdown
No
TTL
3-State
No
# of
Pins
16
SP3232EH
+3.0V to +5.5V
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3232EH_102_031413
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, ...................................................-0.3V to +6.0V
RxIN...................................................................+15V
Output Voltages
TxOUT.............................................................+13.2V
RxOUT, .......................................-0.3V to (V
CC
+0.3V)
Short-Circuit Duration
TxOUT....................................................Continuous
Storage Temperature......................-65°C to +150°C
NOTE 1:
V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.5V with T
AMB
= T
MIN
to T
MAX
PARAMETER
DC CHARACTERISTICS
Supply Current
0.3
1.0
mA
no load, V
CC
= 3.3V,
T
AMB
= 25
o
C, TxIN = GND or V
CC
TxIN
Vcc = 3.3V
Vcc = 5.0V
TxIN, T
AMB
= +25
o
C
I
OUT
= 1.6mA
I
OUT
= -1.0mA
All driver outputs loaded with 3kΩ to
GND, T
AMB
= +25
o
C
MIN.
TYP.
MAX.
UNITS
CONDITIONS
Power Dissipation per package
16-pin SSOP (derate 9.69mW/
o
C above +70
o
C)...............775mW
16-pin PDIP (derate 14.3mW/
o
C above +70
o
C)...............1150mW
16-pin Wide SOIC (derate 11.2mW/
o
C above +70
o
C)........900mW
16-pin TSSOP (derate 10.5mW/
o
C above +70
o
C)..............850mW
ELECTRICAL CHARACTERISTICS
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold LOW
Input Logic Threshold HIGH
Input Logic Threshold HIGH
Input Leakage Current
Output Voltage LOW
Output Voltage HIGH
DRIVER OUTPUTS
Output Voltage Swing
+5.0
+5.4
V
V
CC
-0.6
V
CC
-0.1
GND
2.0
2.4
+0.01
0.8
Vcc
Vcc
+1.0
0.4
V
V
V
µA
V
V
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3232EH_102_031413
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Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.5V with T
AMB
= T
MIN
to T
MAX
PARAMETER
DRIVER OUTPUTS (continued)
Output Resistance
Output Short-Circuit Current
Output Leakage Current
RECEIVER INPUTS
Input Voltage Range
Input Threshold LOW
Input Threshold LOW
Input Threshold HIGH
Input Threshold HIGH
Input Hysteresis
Input Resistance
TIMING CHARACTERISTICS
Maximum Data Rate
Driver Propagation Delay, t
PHL
Driver Propagation Delay, t
PLH
Receiver Propagation Delay, t
PHL
Receiver Propagation Delay, t
PLH
Receiver Output Enable Time
Receiver Output Disable Time
Driver Skew
Receiver Skew
Transition-Region Slew Rate
460
1.0
1.0
0.3
0.3
200
200
100
200
60
500
1000
kbps
µs
µs
µs
µs
ns
ns
ns
ns
V/µs
| t
PHL
- t
PLH
|
| t
PHL
- t
PLH
|
3
-15
0.6
0.8
1.2
1.5
1.5
1.8
0.3
5
7
2.4
2.4
15
V
V
V
V
V
V
kΩ
Vcc = 3.3V
Vcc = 5.0V
Vcc = 3.3V
Vcc = 5.0V
300
+35
+60
+25
Ω
mA
µA
MIN.
TYP.
MAX.
UNITS
CONDITIONS
ELECTRICAL CHARACTERISTICS
V
CC
= V+ = V- = 0V, V
OUT
=+2V
V
OUT
= 0V
V
CC
= 0V, V
OUT
=
+12V
R
L
= 3kΩ, C
L
= 1000pF, one
driver switching
R
L
= 3kΩ, C
L
= 1000pF
R
L
= 3kΩ, C
L
= 1000pF
Receiver input to Receiver
output, C
L
= 150pF
Receiver input to Receiver
output, C
L
= 150pF
Vcc = 3.3V, R
L
= 3kΩ,
C
L
= 1000pF, T
AMB
= 25°C,
measurements taken from -3.0V
to +3.0V or +3.0V to -3.0V
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3232EH_102_031413
3
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 460kbps data rate, all
drivers loaded with 3kΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
6
14
12
10
8
6
4
2
0
Transmitter Output Voltage [V]
4
2
0
0
-2
-4
-6
500
1000
1500
2000
Vout+
Vout-
Slew Rate [V/ µs]
+Slew
-Slew
0
500
Load Capacitance [pF]
1000
1500
Load Capacitance [pF]
2000
2330
Figure 1. Transmitter Output Voltage vs Load
Capacitance
Figure 2. Slew Rate vs Load Capacitance
40
35
30
25
20
15
10
5
0
0
500
1000
1500
2000 2500
3000
460Kbps
120Kbps
20Kbps
Supply Current (mA)
Load Capacitance (pF)
Figure 3. Supply Current VS. Load Capacitance
when Transmitting Data
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3232EH_102_031413
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PIN FUNCTION
NAME
C1+
V+
C1-
C2+
C2-
V-
T
1
OUT
T
2
OUT
R
1
IN
R
2
IN
R
1
OUT
R
2
OUT
T
1
IN
T
2
IN
GND
V
CC
FUNCTION
Positive terminal of the voltage doubler charge-pump capacitor
+5.5V output generated by the charge pump
Negative terminal of the voltage doubler charge-pump capacitor
Positive terminal of the inverting charge-pump capacitor
Negative terminal of the inverting charge-pump capacitor
-5.5V output generated by the charge pump
RS-232 driver output.
RS-232 driver output.
RS-232 receiver input
RS-232 receiver input
TTL/CMOS receiver output
TTL/CMOS receiver output
TTL/CMOS driver input
TTL/CMOS driver input
Ground.
+3.0V to +5.5V supply voltage
PIN NUMBER
SP3232EH
1
2
3
4
5
6
14
7
13
8
12
9
11
10
15
16
Table 1. Device Pin Description
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3232EH_102_031413
5
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