®
SP3222E/3232E
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
■
Minimum 120Kbps Data Rate Under Full
Load
■
1µA Low-Power Shutdown with Receivers
Active (SP3222E)
■
Interoperable with RS-232 down to +2.7V
power source
■
Enhanced ESD Specifications:
±15kV
Human Body Model
±15kV
IEC1000-4-2 Air Discharge
±8kV
IEC1000-4-2 Contact Discharge
EN
1
18 SHDN
17 V
CC
16 GND
15
SP3222E
14
T1OUT
R1IN
C1+ 2
V+
C1-
C2+
C2-
V-
T2OUT
R2IN
3
4
5
6
7
8
9
13 R1OUT
12 T1IN
11 T2IN
10
R2OUT
DIP/SO
Now Available in Lead Free Packaging
Note: See page 6 for other pinouts
DESCRIPTION
The
SP3222E/3232E
series is an RS-232 transceiver solution intended for portable or hand-
held applications such as notebook or palmtop computers. The
SP3222E/3232E
series has
a high-efficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V
operation. This charge pump allows the
SP3222E/3232E
series to deliver true RS-232
performance from a single power supply ranging from +3.3V to +5.0V. The
SP3222E/3232E
are 2-driver/2-receiver devices. This series is ideal for portable or hand-held applications such
as notebook or palmtop computers. The ESD tolerance of the
SP3222E/3232E
devices are
over
±15kV
for both Human Body Model and IEC1000-4-2 Air discharge test methods. The
SP3222E
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
MODEL
SP3222
SP3232
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
4
Shutdown
Yes
No
TTL
3-State
Yes
No
No. of
Pins
18, 20
16
Date: 02/24/05
SP3222E, SP3232E True +3.0 to +5.0V RS-232 Transceivers
© Copyright 2005 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, EN ................................................... -0.3V to +6.0V
RxIN ..........................................................................
±15V
Output Voltages
TxOUT ......................................................................
±15V
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 PDIP (derate 15.2mW/
o
C above +70
o
C) .... 1220mW
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/°C above +70°C) .. 1086mW
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 +5.0V with T
AMB
= T
MIN
to T
MAX
PARAMETER
DC CHARACTERISTICS
Supply Current
Shutdown Supply Current
0.3
1.0
1.0
10
mA
µA
no load, T
AMB
= +25
o
C, V
CC
= 3.3V
SHDN = GND, T
AMB
= +25
o
C, V
CC
= +3.3V
MIN.
TYP.
MAX.
UNITS
CONDITIONS
LOGIC INPUTS AND RECEIVER OUTPUTS
Input Logic Threshold LOW
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
3k
Ω
load to ground at all driver outputs,
T
AMB
= +25
o
C
V
CC
= V+ = V- = 0V, T
OUT
= +2V
V
OUT
= 0V
V
OUT
= +15V
V
OUT
= +12V,V
CC
= 0V to 5.5V,drivers disabled
V
CC
-0.6
V
CC
-0.1
2. 0
2.4
± 0.01
± 0.05
± 1. 0
± 10
0.4
0.8
V
V
µA
µA
V
V
TxIN, EN, SHDN, Note 2
V
CC
= 3.3V, Note 2
V
CC
= 5.0V, Note 2
TxIN, EN, SHDN, T
AMB
= +25
o
C
receivers disabled
I
OUT
= 1.6mA
I
OUT
= -1.0mA
Output Resistance
Output Short-Circuit Current
Output Leakage Current
300
± 35
± 70
± 60
± 100
± 25
Ω
mA
mA
µA
Date: 02/24/05
SP3222E, SP3232E True +3.0 to +5.0V RS-232 Transceivers
© Copyright 2005 Sipex Corporation
2
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, the following specifications apply for V
CC
= +3.0V to +5.0V with T
AMB
= T
MIN
to T
MAX
.
Typical Values apply at V
CC
= +3.3V or +5.0V and T
AMB
= 25
o
C.
PARAMETER
RECEIVER INPUTS
Input Voltage Range
Input Threshold LOW
Input Threshold HIGH
Input Hysteresis
Input Resistance
TIMING CHARACTERISTICS
Maximum Data Rate
Driver Propagation Delay
Receiver Propagation Delay
Receiver Output Enable Time
Receiver Output Disable Time
Driver Skew
Receiver Skew
Transition-Region Slew Rate
120
235
1.0
1.0
0.3
0.3
200
200
100
200
500
1000
30
kbps
µs
µs
µs
ns
ns
ns
ns
V/
µs
| t
PHL
- t
PLH
|, T
AMB
= 25
o
C
| t
PHL
- t
PLH
|
V
CC
= 3.3V, R
L
= 3K
Ω
, T
AMB
= 25
o
C,
measurements taken from -3.0V to +3.0V
or +3.0V to -3.0V
R
L
=3k
Ω
, C
L
=1000pF, one driver switching
t
PHL
, R
L
= 3K
Ω
, C
L
= 1000pF
t
PLH
, R
L
= 3K
Ω
, C
L
= 1000pF
t
PHL
, RxIN to RxOUT, C
L
=150pF
t
PLH
, RxIN to RxOUT, 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
kΩ
V
CC
=3.3V
V
CC
=5.0V
V
CC
=3.3V
V
CC
=5.0V
MIN.
TYP.
MAX.
UNITS
CONDITIONS
NOTE 2:
Driver input hysteresis is typically 250mV.
Date: 02/24/05
SP3222E, SP3232E True +3.0 to +5.0V RS-232 Transceivers
© Copyright 2005 Sipex Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 120kbps data rates, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
6
14
12
10
Slew Rate [V/µs]
Transmitter Output Voltage [V]
4
2
0
0
-2
-4
500
1000
1500
2000
Vout+
Vout-
8
6
4
2
+Slew
-Slew
-6
Load Capacitance [pF]
0
0
500
1000
1500
Load Capacitance [pF]
2000
2330
Figure 1. Transmitter Output Voltage VS. Load
Capacitance for the SP3222 and the SP3232
Figure 2. Slew Rate VS. Load Capacitance for the
SP3222 and the SP3232
50
45
40
35
Supply Current [mA]
118KHz
60KHz
10KHz
30
25
20
15
10
5
0
0
500
1000
1500
2000
2330
Load Capacitance [pF]
Figure 3. Supply Current VS. Load Capacitance when
Transmitting Data for the SP3222 and the SP3232
Date: 02/24/05
SP3222E, SP3232E True +3.0 to +5.0V RS-232 Transceivers
© Copyright 2005 Sipex Corporation
4
PIN NUMBER
NAME
FUNCTION
SP3222E
SSOP/-
DIP/SO
TSSOP
EN
C1+
V+
C1-
C2+
C2-
V-
T1OUT
T2OUT
R1IN
R2IN
R1OUT
R2OUT
T1IN
T2IN
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 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 generated by the charge pump.
RS-232 driver output.
RS-232 driver output.
RS-232 receiver input.
RS-232 receiver input.
TTL/CMOS reciever output.
TTL/CMOS reciever 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.
1
2
3
4
5
6
7
15
8
14
9
13
10
12
11
16
17
18
-
1
2
3
4
5
6
7
17
8
16
9
15
10
13
12
18
19
20
11, 14
SP3232E
-
1
2
3
4
5
6
14
7
13
8
12
9
11
10
15
16
-
-
Table 1. Device Pin Description
Date: 02/24/05
SP3222E, SP3232E True +3.0 to +5.0V RS-232 Transceivers
© Copyright 2005 Sipex Corporation
5
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