1/15Septe mber 2005
■ SUPPLY VOLTAGE RANGE: 4. 5 T O 5.5V
■SUPPLY CURRENT NO LOAD (TYP): 5mA
■TRANSMITTER OUTPUT VOLTAGE SWING
(TYP): ±7.8V
■CONTR OLLED OUT PUT SLEW RATE
■RECEIVER INPUT VOLTAGE RANGE: ±30V
■D ATA RATE (TYP): 2 20Kbps
■OPERATING TEMPERATURE RANGE:
-40 TO 85°C, 0 TO 70°C
■COMPATIBLE WITH MAX232 AND MAX202
DESCRIPTION
The ST232 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 applications are in:
Portable Computers, Low Power Modems,
Interfaces Translation, Battery Powered RS-232
Syste m, Multi-Drop RS-232 Networks.
Ta bl e 1 : Or der Code s
Type Temperature
Range Package Comments
ST232CN 0 to 70 °C DIP-16 25parts per tube / 40tube per box
ST232BN -40 to 85 °C DIP-16 25parts per tube / 40tube per box
ST232CD 0 to 70 °C SO-16 (Tube) 50parts per tube / 20tube per box
ST232BD -40 to 85 °C SO-16 (Tube) 50parts per tube / 20tube per box
ST232CDR 0 to 70 °C SO-16 (Tape & Reel) 2500 parts per reel
ST232BDR -40 to 85 °C SO-16 (Tape & Reel) 2500 parts per reel
ST232CW 0 to 70 °C SO-16 Large (Tube) 49 parts per tube / 25 tube per box
ST232BW -40 to 85 °C SO-16 Large (Tube) 49 parts per tube / 25 tube per box
ST232CWR 0 to 70 °C SO-16 Large (Tape & Reel) 1000 parts per reel
ST232BWR -40 to 85 °C SO-16 Large (Tape & Reel) 1000 parts per reel
ST232CT 0 to 70 °C TSSOP16 (Tube) only for samples
ST232BT -40 to 85 °C TSSOP16 (Tube) only for samples
ST232CTR 0 to 70 °C TSSOP16 (Tape & Reel) 2500 parts per reel
ST232BTR -40 to 85 °C TSSOP16 (Tape & Reel) 2500 parts per reel
ST232
5V POWERED MULTI-CHANNEL
RS-232 DRIVERS AND RECEIVERS
SOP Large
DIP SOP
TSSOP
Rev. 11
ST232
2/15
Fi gure 1: Pin C o nfig uration
Table 2: Pin Description
Table 3: 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.
Note 1: No external supply can be applied to V+ terminal a nd V- terminal.
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 T ransmitter 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
TIN Transmitter Input Voltage Range -0.3 to (VCC + 0.3) V
RIN Receiver Input Voltage Range ± 30 V
TOUT Transmitter Output Voltage Range (V+ + 0.3) to (V- - 0.3) V
ROUT Receiver Output Voltage Range -0.3 to (VCC + 0.3) V
TSCTOUT Short Circuit Duration on TOUT infinite
Tstg Storage Temperature Range -65 to + 150 °C
ST232
3/15
Table 4: Electrical Characteristics
(C1 - C4 = 0. 1µF, VCC = 5V ± 10% , TA = -40 to 85°C, unless otherwise specified.
Typical values are referred to TA = 25°C)
Table 5: Transm itter Electric al Characteristic s
(C1 - C4 = 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 o r from -3V to 3V.
Note2 : One transmitter outp ut is loaded with RL = 3K Ω to 7KΩ, CL = 50 to 1000p F
Table 6: Receiv er Electrical Charac teristics
(C1 - C4 = 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-CM OS OUT (from 50% to 50%)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
ISUPPLY VCC Power Supply Current No Load, TA = 25°C 5 10 mA
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VTOUT Output Voltage Swing All Transmitter outputs are loaded with
3KΩ to GND ± 5± 7.8 V
ITIL Input Leakage Current ± 40 µA
VTIL Input Logic Threshold Low 0.8 V
VTIH Input Logic Threshold High 2 V
SRTTransition Slew Rate TA = 25°C, VCC = 5V
RL = 3 to 7KΩ,C
L = 50 to 2500pF
(Note1)
730V/µs
DRData Rate (Note 2) 120 220 Kbits/s
RTOUT Transmitter Output
Resistance VCC = V+ = V- = 0V VOUT = ±
2V 300 Ω
ISC Transmitter Output Short
Circuit Current One TXOUT to GND ±10 ±60 mA
Symbol Parameter Test Conditions Min. Typ. Max. Unit
VRIN Receiver Input Voltage
Operating Rang e -30 30 V
RRIN RS-232 Input Resistance TA = 25°C, VCC = 5 V, VRIN = 5V 357KΩ
VRIL RS-232 Input Logic
Threshold Low TA = 25°C, VCC = 5 V 0.8 1.2 V
VRIH RS-232 Input Logic
Threshold High TA = 25°C, VCC = 5 V 1.7 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)0.4V
VROH TTL/CMOS Output Voltage
High IOUT = -1mA (to GND) 3.5 VCC-0.4 V
tDR Receiver Propagation Delay CL = 150pF (Note 1) 0.3 1 µs
ISCR Receiver Output Short
Circuit Current ±10 mA
ST232
4/15
Fi gure 2: Application Circ uits (note 1, note 2)
Note 1: C1-4 capa ci t ors c an even be 1µF on es.
Note 2: C1-4 can be comm on or biased c apacit ors.
Table 7: Capacitance Value ( µF)
C1 C2. C3 C4 C5
0.1 0.1 0.1 0.1 0.1
ST232
5/15
TYPICAL PERFORMANCE CHARACTERISTICS (unless otherwise specified Tj = 25°C)
Fi gure 3 : Supply Current vs Temperature
Fi gure 4 : Data Rate vs Temperature
Fi gure 5 : Receiver Pro pagation Delay
Fi gure 6 : Dri ver Propagation Delay
Fi gure 7 : High Level Output Voltage Swing
vs Temperature
Fi gure 8 : Low Level Output Voltage Swing
vs Temperat ure
ST232
6/15
Figure 9: High Level Transmitter Output Short
Circuit Current vs Temperature
Figure 10: Low Level Transmitter Output Short
Circuit Current vs Temperature
Figure 11: High Level Receiver Output Short
Circuit Current vs Temperature
Table 8: Low Level Receiver Output Short
Circuit Current vs Temperature
ST232
7/15
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
Plastic DIP-16 (0.25) MECHANICAL DATA
P001C
ST232
8/15
DIM. mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 1.75 0.068
a1 0.1 0.25 0.004 0.010
a2 1.64 0.063
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
S8° (max.)
SO-16 MECHANICAL DATA
0016020D
ST232
9/15
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 0.393 0.419
e 1.27 0.050
e3 8.89 0.350
F 7.4 7.6 0.291 0.300
G
L 0.5 1.27 0.020 0.050
M 0.75 0.029
S8 ˚ (max.)
SO-16L MECHANICAL DATA
PO13I
ST232
10/15
DIM. mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 1.2 0.047
A1 0.05 0.15 0.002 0.004 0.006
A2 0.8 1 1.05 0.031 0.039 0.041
b 0.19 0.30 0.007 0.012
c 0.09 0.20 0.004 0.0079
D 4.9 5 5.1 0.193 0.197 0.201
E 6.2 6.4 6.6 0.244 0.252 0.260
E1 4.3 4.4 4.48 0.169 0.173 0.176
e 0.65 BSC 0.0256 BSC
K0˚8˚0˚8˚
L 0.45 0.60 0.75 0.018 0.024 0.030
TSSOP16 MECHANICAL DATA
cE
b
A2
A
E1
D
1
PIN 1 IDENTIFICATION
A1 L
K
e
0080338D
ST232
11/15
DIM. mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 22.4 0.882
Ao 6.45 6.65 0.254 0.262
Bo 10.3 10.5 0.406 0.414
Ko 2.1 2.3 0.082 0.090
Po 3.9 4.1 0.153 0.161
P 7.9 8.1 0.311 0.319
Tape & Reel SO-16 MECHANICAL DATA
ST232
12/15
DIM. mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 22.4 0.882
Ao 10.8 11.0 0.425 0.433
Bo 10.7 10.9 0.421 0.429
Ko 2.9 3.1 0.114 0.122
Po 3.9 4.1 0.153 0.161
P 11.9 12.1 0.468 0.476
Tape & Reel SO-16L MECHANICAL DATA
ST232
13/15
DIM. mm. inch
MIN. TYP MAX. MIN. TYP. MAX.
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 22.4 0.882
Ao 6.7 6.9 0.264 0.272
Bo 5.3 5.5 0.209 0.217
Ko 1.6 1.8 0.063 0.071
Po 3.9 4.1 0.153 0.161
P 7.9 8.1 0.311 0.319
Tape & Reel TSSOP16 MECHANICAL DATA
ST232
14/15
Table 9: Revision History
Date R evisio n Descrip tion of Change s
02-Sep-2005 11 Mistake ITIL max. on table 5.
ST232
15/15
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