SP3222EB/SP3232EB
True +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
■ 250kbps Transmission Rate Under Load
■ 1µA Low Power Shutdown with
Receivers active (SP3222EB)
■ 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
C1+ 1
V+ 2
C1- 3
C2+ 4
C2- 5
V- 6
T2OUT 7
R2IN 8
16 V
CC
15 GND
14 T1OUT
SP3232EB 13 R1IN
12 R1OUT
11 T1IN
10 T2IN
9 R2OUT
Now Available in Lead Free Packaging
DESCRIPTION
The SP3222EB/SP3232EB series is an RS-232 transceiver solution intended for portable or
hand-held applications such as notebook or laptop computers. The SP3222EB/SP3232EB
series has a high-efficiency, charge-pump power supply that requires only 0.1µF capacitors
in 3.3V operation. This charge pump allows the SP3222EB/SP3232EB series to deliver true
RS-232 performance from a single power supply ranging from +3.0V to +5.5V. The SP3222EB/
SP3232EB are 2-driver/2-receiver devices. The ESD tolerance of the SP3222EB/SP3232EB
devices is over +/-15kV for both Human Body Model and IEC61000-4-2 Air discharge test
methods. The SP3222EB device has a low-power shutdown mode where the devices' driver
outputs and charge pumps are disabled. During shutdown, the supply current falls to less
than 1µA.
SELECTION TABLE
Device
SP3222EB
SP3232EB
Power
Supplies
+3.0V to
+5.5V
+3.0V to
+5.5V
RS-232
Drivers
2
2
RS-232
Receivers
2
2
External
Components
4 Capacitors
4 Capacitors
Shutdown
Yes
No
TTL
3-State
Yes
No
# of
Pins
18, 20
16
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222EB/SP3232EB_103_081414
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, EN..............................................-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
Power Dissipation per package
20-pin SSOP (derate 9.25mW/
o
C above +70
o
C)..............750mW
18-pin SOIC (derate 15.7mW/
o
C above +70
o
C)..............1260mW
20-pin TSSOP (derate 11.1mW/
o
C above +70
o
C).............890mW
16-pin SSOP (derate 9.69mW/
o
C above +70
o
C)...............775mW
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
16-pin nSOIC (derate 13.57mW/
o
C above +70
o
C)...........1086mW
Maximum Junction Temperature .......................................+125°C
Thermal Resistance
Θ
JA
..............................................100.4°C/W
Thermal Resistance
Θ
JC
................................................19.0°C/W
NOTE 1:
V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
NOTE 2:
Driver Input hysteresis is typically 250mV.
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.
PARAMETER
DC CHARACTERISTICS
Supply Current
Shutdown Supply Current
0.3
1.0
1.0
10
mA
µA
no load, V
CC
= 3.3V,
T
AMB
= 25
o
C, TxIN = GND or V
CC
SHDN = GND, VCC = 3.3V,
T
AMB
= 25
o
C, TxIN = Vcc or GND
TxIN, EN, SHDN, Note 2
Vcc = 3.3V, Note 2
Vcc = 5.0V, Note 2
TxIN, EN, SHDN,
T
AMB
= +25
o
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
o
C
MIN.
TYP.
MAX.
UNITS
CONDITIONS
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold LOW
Input Logic Threshold HIGH
Input Logic Threshold HIGH
Input Leakage Current
Output 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
+0.05
0.8
Vcc
Vcc
+1.0
+10
0.4
V
V
V
µA
µA
V
V
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222EB/SP3232EB_103_081414
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 - C4 = 0.1µF. Typical values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25°C.
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
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
250
0.15
0.15
200
200
100
50
30
kbps
µs
µs
ns
ns
ns
ns
V/µs
| t
PHL
- t
PLH
|, T
AMB
= 25°C
| t
PHL
- t
PLH
|
R
L
= 3kΩ, C
L
= 1000pF, one
driver active
Receiver input to Receiver
output, C
L
= 150pF
Receiver input to Receiver
output, C
L
= 150pF
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 or 3.0V to 5.5V, V
OUT
=
+12V, Drivers disabled
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
SP3222EB/SP3232EB_103_081414
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.
6
4
2
TxOUT+
30
25
- Slew
+ Slew
Slew rate (V/µs)
20
15
10
5
0
0
500
T1 at 250Kbps
T2 at 15.6Kbps
All TX loaded 3K // CLoad
Transmitter Output
Voltage (V)
T1 at 250Kbps
0
-2
-4
-6
0
TxOUT -
T2 at 15.6Kbps
All TX loaded 3K // CLoad
1000
2000
3000
4000
5000
1000
2000
3000
4000
5000
Load Capacitance (pF)
Load Capacitance (pF)
Figure 1. Transmitter Output Voltage vs Load
Capacitance
Figure 2. Slew Rate vs Load Capacitance
35
T2 at 1/16 Data Rate
All TX loaded 3K // CLoad
125Kbps
250Kbps
16
T1 at Full Data Rate
Supply Current (mA)
30
Supply Current (mA)
14
12
10
8
6
4
2
0
1 Transmitter at 250Kbps
1 Transmitter at 15.6Kbps
All transmitters loaded with 3K // 1000pf
25
20
15
10
5
0
0
20Kbps
2.7
3
3.5
4
4.5
5
1000
2000
3000
4000
5000
Supply Voltage (V)
Load Capacitance (pF)
Figure 3. Supply Current VS. Load Capacitance
when Transmitting Data
Figure 4. Supply Current VS. Supply Voltage
6
TxOUT+
4
Transmitter Output
Voltage (V)
2
T1 at 250Kbps
0
-2
-4
-6
2.7
3
3.5
T2 at 15.6Kbps
All TX loaded 3K // 1000 pF
TxOUT -
4
4.5
5
Supply Voltage (V)
Figure 5. Transmitter Output Voltage vs Supply
Voltage
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222EB/SP3232EB_103_081414
4
PIN FUNCTION
PIN NUMBER
NAME
FUNCTION
SP3222EB
SOIC
Receiver Enable. Apply Logic LOW for normal operation.
Apply logic HIGH to disable the receiver outputs (high-Z state)
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
Shutdown Control Input. Drive HIGH for normal device operation.
Drive LOW to shutdown the drivers (high-Z output) and the on-
board power supply
No Connect
SSOP
TSSOP
1
2
3
4
5
6
7
17
8
16
9
15
10
13
12
18
19
20
11, 14
-
1
2
3
4
5
6
14
7
13
8
12
9
11
10
15
16
-
-
SP3232EB
EN
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
SHDN
N.C.
1
2
3
4
5
6
7
15
8
14
9
13
10
12
11
16
17
18
-
Table 1. Device Pin Description
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222EB/SP3232EB_103_081414
5
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