SP3222EU/SP3232EU
3.3V, 1000 kbps RS-232 Transceivers
FEATURES
■ Meets true EIA/TIA-232-F Standards
from a +3.0V to +5.5V power supply
■ Minimum 1000kbps Data Rate
■ 1µA Low Power Shutdown with
Receivers active (SP3222EU)
■ 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
■ Ideal for Handheld, Battery Operated
Applications
EN
1
18 SHDN
17 V
CC
16 GND
15 T1OUT
SP3222EU 14 R1IN
13 R1OUT
12 T1IN
11 T2IN
10 R2OUT
nSOIC
C1+ 2
V+ 3
C1- 4
C2+ 5
C2- 6
V-
7
T2OUT 8
R2IN 9
Now Available in Lead Free Packaging
The
SP3222EU
and the
SP3232EU
are 2 driver, 2 receiver RS-232 transceiver solutions
intended for portable or hand-held applications such as notebook or palmtop computers.
Their data transmission rate of 1000 kbps meets the demands of high speed RS-232 ap-
plications. The
SP3222EU/SP3232EU
series has a high-efficiency, charge-pump power
supply that requires only 0.1µF capacitors in 3.3V operation. This charge pump allows the
SP3222EU/SP3232EU
series to deliver true RS-232 performance from a single power supply
ranging from +3.0V to +5.5V. The ESD tolerance of the
SP3222EU/SP3232EU
devices are
over +/-15kV for both Human Body Model and IEC61000-4-2 Air discharge test methods. The
SP3222EU
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.
DESCRIPTION
SELECTION TABLE
MODEL
Power
Supplies
RS-232 RS-232
Drivers Receivers
2
2
2
2
External
Components
4 Capacitors
4 Capacitors
Shutdown
Yes
No
TTL
3-State
Yes
No
# of
Pins
18, 20
16
SP3222EU +3.0V to +5.5V
SP3232EU +3.0V to +5.5V
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222EU/SP3232EU_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, EN, SHDN.........................-0.3V to Vcc + 0.3V
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 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
16-pin nSOIC (derate 13.57mW/
o
C above +70
o
C)...........1086mW
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
, C
1
to
C
4
= 0.1µF. Typical values apply at Vcc = +3.3V and T
AMB
= 25°C
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
ELECTRICAL CHARACTERISTICS
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
Vcc
+1.0
+10
0.4
0.8
V
V
V
µA
µA
V
V
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222EU/SP3232EU_102_031413
2
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.5V with T
AMB
= T
MIN
to T
MAX
, C
1
to
C
4
= 0.1µF. Typical values apply at Vcc = +3.3V 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
1000
0.15
0.15
200
200
100
50
90
kbps
µs
µs
ns
ns
ns
ns
V/µs
| t
PHL
- t
PLH
|, T
AMB
= 25°C
| t
PHL
- t
PLH
|
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
R
L
= 3kΩ, C
L
= 250pF, one driver
switching
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
V
CC
= V+ = V- = 0V, T
OUT
=+2V
V
OUT
= 0V
V
CC
= 0V or 3.0V to 5.5V,
V
OUT
= +12V, Drivers disabled
MIN.
TYP.
MAX.
UNITS
CONDITIONS
ELECTRICAL CHARACTERISTICS
NOTE 2: Driver input hysteresis is typically 250mV.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222EU/SP3232EU_102_031413
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
Transmitter
Output Voltage (V)
120
Slew Rate (V/µs)
T1 at 1Mbps
T2 at 62.5Kbps
4
2
0
-2
-4
-6
0
100
80
60
40
20
0
0
250
500
T1 at 1Mbps
T2 at 62.5Kbps
All TX loaded 3K // CLoad
250
500
1000
Load Capacitance (pF)
1500
1000
1500
2000
Load Capacitance (pF)
Figure 1. Transmitter Output Voltage vs Load
Capacitance for the SP3222EU and SP3232EU
Figure 2. Slew Rate vs Load Capacitance for the
SP3222EU and SP3232EU
35
Supply Current (mA)
20
30
20
15
10
5
0
0
T1 at 1Mbps
T2 at 62.5Kbps
Supply Current (mA)
15
10
5
0
T1 at 1Mbps
T2 at 62.5Kbps
250
500
1000
Load Capacitance (pF)
1500
2.7
3
3.5
4
Supply Voltage (V)
4.5
5
Figure 3. Supply Current VS. Load Capacitance
when Transmitting Data for the SP3222EU and
SP3232EU
Figure 4. Supply Current VS. Supply Voltage for the
SP3222EU and SP3232EU
6
200
150
100
50
0
T1 at 500Kbps
T2 at 31.2Kbps
All TX loaded 3K // CLoad
Transmitter Output
Voltage (V)
4
T1 at 1Mbps
T2 at 62.5Kbps
0
-2
-4
-6
2.7
3
Skew (nS)
2
3.5
4
Supply Voltage (V)
4.5
5
0
250
500
1000
1500
Load Capacitance (pF)
2000
Figure 5. Transmitter Output Voltage vs Supply
Voltage for the SP3222EU and SP3232EU
Figure 6. Transmitter Skew VS. Load Capacitance
for the SP3222EU and SP3232EU
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222EU/SP3232EU_102_031413
4
PIN FUNCTION
PIN NUMBER
NAME
FUNCTION
SP3222EU
SOIC
1
2
3
4
5
6
7
15
8
14
9
13
10
12
11
16
17
18
-
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
-
-
SP3232EU
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.
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
Table 1. Device Pin Description
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
SP3222EU/SP3232EU_102_031413
5
