®
SP3222B/3232B
True +3.0V to +5.5V RS-232 Transceivers
■
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 (SP3222B)
■
Interoperable with RS-232 down to +2.7V
power source
■
ESD Specifications:
±2kV
Human Body Model
DESCRIPTION
The SP3222B/3232B series is an RS-232 transceiver solution intended for portable or hand-
held applications such as notebook or palmtop computers. The SP3222B/3232B series has
a high-efficiency, charge-pump power supply that requires only 0.1µF capacitors in 3.3V
operation. This charge pump allows the SP3222B/3232B series to deliver true RS-232
performance from a single power supply ranging from +3.0V to +5.5V. The ESD tolerance
of the SP3222B/3232B devices are over
±15kV
for both Human Body Model and IEC1000-
4-2 Air discharge test methods. The SP3222B 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
SP3222B
SP3232B
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
Rev. 6/30/03
SP3222B/3232B True +3.0 to +5.5V RS-232 Transceivers
© Copyright 2003 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 ..................................................................
±25V
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 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.
NOTE 2:
Driver Input hysteresis is typically 250mV.
SPECIFICATIONS
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
PARAMETER
DC CHARACTERISTICS
Supply Current
Shutdown Supply Current
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
Output Resistance
Output Short-Circuit Current
Output Leakage Current
±5.0
300
±35
±60
±25
±5.4
V
Ω
mA
µA
3kΩ load to ground at all driver
outputs, T
AMB
= +25°C
V
CC
= V+ = V- = 0V, T
OUT
= +2V
V
OUT
= 0V
V
OUT
=
±12V,V
CC
= 0V,
or 3.0V 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
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°C,
V
IN
= 0V to V
CC
receivers disabled, V
OUT
= 0V to V
CC
I
OUT
= 1.6mA
I
OUT
= -1.0mA
0.3
1.0
1.0
10
mA
µA
no load, T
AMB
= +25°C, V
CC
= 3.3V,
TxIN = V
CC
or GND
SHDN = GND, T
AMB
= +25°C,
V
CC
= +3.3V, TxIN = V
CC
or GND
MIN.
TYP.
MAX.
UNITS
CONDITIONS
Rev. 6/30/03
SP3222B/3232B True +3.0 to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
2
SPECIFICATIONS (continued)
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 V
CC
= +3.3V or +5.5V 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
Receiver Propagation Delay
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
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
, RxIN to RxOUT, C
L
=150pF
t
PLH
, RxIN to RxOUT, C
L
=150pF
3
-25
0.6
0.8
1.2
1.5
1.5
1.8
0.3
5
7
2.4
2.4
+25
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
Rev. 6/30/03
SP3222B/3232B True +3.0 to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
3
TYPICAL PERFORMANCE CHARACTERISTICS
Unless otherwise noted, the following performance characteristics apply for V
CC
= +3.3V, 250kbps data rates, all drivers
loaded with 3kΩ, 0.1µF charge pump capacitors, and T
AMB
= +25°C.
6
4
Transmitter Output
Voltage (V)
TxOUT +
30
25
Slew rate (V/µs)
- Slew
+ Slew
2
T1 at 250Kbps
20
15
10
5
T1 at 250Kbps
T2 at 15.6Kbps
All TX loaded 3K // CLoad
0
-2
-4
-6
0
TxOUT -
T2 at 15.6Kbps
All TX loaded 3K // CLoad
1000
2000
3000
4000
5000
0
0
500
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
Supply Current (mA)
30
Supply Current (mA)
T1 at Full Data Rate
T2 at 1/16 Data Rate
All TX loaded 3K // CLoad
125Kbps
250Kbps
16
14
12
10
8
6
4
2
1 Transmitter at 250Kbps
1 Transmitter at 15.6Kbps
All transmitters loaded with 3K // 1000pf
25
20
15
10
5
0
0
20Kbps
1000
2000
3000
4000
5000
0
2.7
3
3.5
4
4.5
5
Load Capacitance (pF)
Supply Voltage (V)
Figure 3. Supply Current vs Load Capacitance when
Transmitting Data.
Figure 4. Supply Current vs Supply Voltage.
6
TxOUT +
Transmitter Output
Voltage (V)
4
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.
Rev. 6/30/03
SP3222B/3232B True +3.0 to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
4
PIN NUMBER
NAME
FUNCTION
SP3222B
DIP/SO
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
-
SSOP
TSSOP
1
2
3
4
5
6
7
17
8
16
9
15
10
13
12
18
19
20
11, 14
SP3232B
-
1
2
3
4
5
6
14
7
13
8
12
9
11
10
15
16
-
-
Table 1. Device Pin Description
Rev. 6/30/03
SP3222B/3232B True +3.0 to +5.5V RS-232 Transceivers
© Copyright 2003 Sipex Corporation
5
