1/10February 2001
■SUPPLY VOLTAGE RANGE: 4.5 TO 5.5V
■SUPPLY CURRENT NO LOAD (TYP): 1.5mA
■TRASMITTER OUTPUT VOLTAGE SWING
(TYP): ± 9V
■TRANSITION SLEW RATE (TYP.): 12V/µs
■RECEIVER PROPAGATION DELAY (TYP.):
0.1µs
■RECEIVER INPUT VOLTAGE RANGE: ± 30V
■DATA RATE (TYP.): 400Kbp/s
■OPERATING TEMPERATURE RANGE:
-40 TO85 °C, 0 TO70°C
DESCRIPTION
The ST232A is a 2 driver, 2 receiver device
following EIA/TIA-232 and V.28 communication
standard. It is particularly suitable for applications
where ± 12V is not available. The ST232 uses a
single 5V power supply and only four external
capacitors (0.1µF). Typical application are in:
Portable Computers, Low Power Modems,
Interfaces Translation, Battery Powered RS-232
Networks.
ORDERING CODES
Type Temperature
Range Package Comments
ST232ACN 0 to 70 °C DIP-16 25parts per tube / 40tube per box
ST232ABN -40 to 85 °C DIP-16 25parts per tube / 40tube per box
ST232ACD 0 to 70 °C SO-16 (Tube) 49parts per tube / 25tube per box
ST232ABD -40 to 85 °C SO-16 (Tube) 49parts per tube / 25tube per box
ST232ACDR 0 to 70 °C SO-16 (Tape & Reel) 2500 parts per reel
ST232ABDR -40 to 85 °C SO-16 (Tape & Reel) 2500 parts per reel
ST232ACW 0 to 70 °C SO-16 Large (Tube) 50parts per tube / 20tube per box
ST232ABW -40 to 85 °C SO-16 Large (Tube) 50parts per tube / 20tube per box
ST232ACWR 0 to 70 °C SO-16 Large (Tape& Reel) 1000 parts per reel
ST232ABWR -40 to 85 °C SO-16 Large (Tape& Reel) 1000 parts per reel
ST232ACTR 0 to 70 °C TSSOP16 (Tape & Reel) 2500 parts per reel
ST232ABTR -40 to 85 °C TSSOP16 (Tape & Reel) 2500 parts per reel
ST232A
VERY HIGH SPEED, ULTRA LOW POWER CONSUMPTION
5V POWERED RS-232 DRIVERS AND RECEIVERS
SOP Large
DIP SOP
TSSOP
ST232A
2/10
PIN CONFIGURATION
PIN DESCRIPTION
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is
not implied.
PlN N°SYMBOL NAME AND FUNCTION
1C1+ Positive Terminal for the first Charge Pump Capacitor
2 V+ Doubled Voltage Terminal
3C1- Negative Terminal for the first Charge Pump Capacitor
4C2+ Positive Terminal for the second Charge Pump Capacitor
5C2- Negative Terminal for the second Charge Pump Capacitor
6 V- Inverted Voltage Terminal
7T2OUT Second Transmitter Output Voltage
8R2IN Second Receiver Input Voltage
9R2OUT Second Receiver Output Voltage
10 T2IN Second Transmitter Input Voltage
11 T1IN First Transmitter Input Voltage
12 R1OUT First Receiver Output Voltage
13 R1IN First Receiver Input Voltage
14 T1OUT First Transmitter Output Voltage
15 GND Ground
16 VCC Supply Voltage
Symbol Parameter Value Unit
VCC Supply Voltage -0.3 to 6 V
V+ Extra Positive Voltage (VCC -0.3) to 13.2 V
V- Extra Negative Voltage 0.3 to -13.2 V
TIN Transmitter Input Voltage Range -0.3 to (VCC + 0.3) V
RIN Receiver Input Voltage Range ± 30 V
TOUT Transmitter Output Voltage Range ± 15 V
ROUT Receiver Output Voltage Range -0.3 to (VCC + 0.3) V
TSCTOUT Short Circuit Duration on TOUT infinite
ST232A
3/10
ELECTRICAL CHARACTERISTICS
(C1-C
4= 0.1µF, VCC =5V± 10%, TA= -40 to 85°C, unless otherwise specified.
Typical values are referred to TA=25°C)
TRANSMITTER ELECTRICAL CHARACTERISTICS
(C1-C
4= 0.1µF, VCC =5V± 10%, TA= -40 to 85°C, unless otherwise specified.
Typical values are referred to TA=25°C)
Note 1: Measured from 3V to -3V or from -3V to 3V.
Note2: One trasmitter output is loaded with RL=3KΩto 7KΩ,C
L= 50 to 1000pF
RECEIVER ELECTRICAL CHARACTERISTICS
(C1-C
4= 0.1µF, VCC =5V± 10%, TA= -40 to 85°C, unless otherwise specified.
Typical values are referred to TA=25°C)
Note 1: RS-232 IN to TTL-CMOS OUT (from 50% to 50%)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
ISUPPLY VCC Power Supply Current No Load 1.5 4 mA
Symbol Parameter Test Conditions Min. Typ. Max. Unit
TTOUT Output Voltage Swing All Transmitter outputs are loaded with
3KΩto GND ± 5± 9V
I
TIL Logic Pull-Up Current TIN =0V 5 40 µA
V
TIL Input Logic Threshold Low 0.8 1.4 V
VTIH Input Logic Threshold High 1.4 2 V
SRTTransition Slew Rate TA=25°C, VCC =5V
R
L= 3 to 7KΩ,C
L
= 50 to 2500pF
(Note1)
61230V/µs
D
R
Data Rate (Note 2) 200 400 Kbits/s
RTOUT Transmitter Output
Resistance VCC =V+=V-=0V V
OUT =±2V 300 10M Ω
ISC Transmitter Output Short
Circuit Current one TXOUT to GND ± 7± 22 mA
tdT Propagation Delay Time TTL-CMOS IN to RS-232 OUT
CL= 150pF (50% to 50%) 1.3 3.5 µs
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VRIN Receiver Input Voltage
Operating Range -30 30 V
RRIN RS-232 Input Resistance TA=25°C357KΩ
V
RIL RS-232 Input Threshold
Low 0.8 1.3 V
VRIH RS-232 Input Threshold
High 1.8 2.4 V
VRIHYS RS-232 Input Hysteresis VCC = 5V 0.2 0.5 1 V
VROL TTL/CMOS Output Voltage
Low IOUT = 3.2mA (to VCC) 0.2 0.4 V
VROH TTL/CMOS Output Voltage
High IOUT = 1mA (to GND) 3.5 VCC-0.2 V
ISCR Receiver Output Short
Circuit Current to GND
to VCC 2
10 10
30 mA
mA
tdR Propagation Delay Time CL= 150pF (Note 1) 0.1 0.5 µs
ST232A
4/10
APPLICATION CIRCUITS (note 1, note 2)
Note 1: C1-4 capacitors can even be 1µF ones.
Note 2: C1-4 can be common or biased capacitors.
CAPACITANCE VALUE (µF)
C1 C2. C3 C4 C5
0.1 0.1 0.1 0.1 0.1
ST232A
5/10
TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specified Tj=25°C)
Figure 1 : Driver Voltage Transfer Characteristics
Figure 2 : Drive Short Circuit Output Current vs
Temperature
Figure 3 : Receiver Threshold vs Supply Voltage
Figure 4 : Driver Output Current vs Output
Voltage
Figure 5 : Driver Short Circuit Supply Current vs
Temperature
Figure 6 : Receiver Threshold vs Temperature
ST232A
6/10
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
a1 0.51 0.020
B 0.77 1.65 0.030 0.065
b 0.5 0.020
b1 0.25 0.010
D 20 0.787
E 8.5 0.335
e 2.54 0.100
e3 17.78 0.700
F 7.1 0.280
I 5.1 0.201
L 3.3 0.130
Z 1.27 0.050
P001C
Plastic DIP-16 (0.25) MECHANICAL DATA
ST232A
7/10
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 1.75 0.068
a1 0.1 0.2 0.004 0.007
a2 1.65 0.064
b 0.35 0.46 0.013 0.018
b1 0.19 0.25 0.007 0.010
C 0.5 0.019
c1 45 (typ.)
D 9.8 10 0.385 0.393
E 5.8 6.2 0.228 0.244
e 1.27 0.050
e3 8.89 0.350
F 3.8 4.0 0.149 0.157
G 4.6 5.3 0.181 0.208
L 0.5 1.27 0.019 0.050
M 0.62 0.024
S 8 (max.)
P013H
SO-16 MECHANICAL DATA
ST232A
8/10
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 2.65 0.104
a1 0.1 0.2 0.004 0.008
a2 2.45 0.096
b 0.35 0.49 0.014 0.019
b1 0.23 0.32 0.009 0.012
C 0.5 0.020
c1 45 (typ.)
D 10.1 10.5 0.397 0.413
E 10.0 10.65 0.3.93 0.419
e 1.27 0.050
e3 8.89 0.350
F 7.4 7.6 0.291 0.300
L 0.5 1.27 0.020 0.050
M 0.75 0.029
S 8 (max.)
P013I
SO16L MECHANICAL DATA
ST232A
9/10
DIM. mm inch
MIN. TYP. MAX. MIN. TYP. MAX.
A 1.1 0.433
A1 0.05 0.10 0.15 0.002 0.004 0.006
A2 0.85 0.9 0.95 0.335 0.354 0.374
b 0.19 0.30 0.0075 0.0118
c 0.09 0.20 0.0035 0.0079
D 4.9 5 5.1 0.193 0.197 0.201
E 6.25 6.4 6.5 0.246 0.252 0.256
E1 4.3 4.4 4.48 0.169 0.173 0.176
e 0.65 BSC 0.0256BSC
K0
o4
o8
o0
o4
o8
o
L 0.50 0.60 0.70 0.020 0.024 0.028
cE
b
A2
A
E1
D
1
PIN 1 IDENTIFICATION
A1 L
K
e
TSSOP16 MECHANICAL DATA
ST232A
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consequences of use of such information nor for any infringementof patents or other rights of third parties which may resultfrom
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
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