ST232
5V POWERED MULTI-CHANNEL
RS-232 DRIVERS AND RECEIVERS
s SUPPLY VOLTAGE RANGE: 4.5 TO 5.5V N D
s SUPPLY CURRENT NO LOAD (TYP): 5mA (Plastic Package) (Micro Package)
s TRANSMITTER OUTPUT VOLTAGESWING
W T
(TYP): 7.8V
s CONTROLLED OUTPUT SLEW RATE (Micro Package Large) (TSSOP Package)
s RECEIVER INPUT VOLTAGE RANGE: 30V
s DATA RATE (TYP): 220Kbps
s OPERATING TEMPERATURE RANGE:
-40 TO 85 oC, 0 TO 70 oC
s 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 (0.1F). Typical applications are in:
Portable Computers, Low Power Modems,
Interfaces Translation, Battery Powered RS-232
System, Multi-Drop RS-232 Networks.
ORDER CODES T emperature P ackag e Comments
Ran ge
Type DIP-16 25 parts per tube / 40 tube per box
0 to 70 oC DIP-16 25 parts per tube / 40 tube per box
ST232CN -40 to 85 oC SO-16 (Tube) 50 parts per tube / 20 tube per box
ST232BN 0 to 70 oC SO-16 (Tube) 50 parts per tube / 20 tube per box
ST232CD -40 to 85 oC SO-16 (Tape & Reel)
ST232BD 0 to 70 oC SO-16 (Tape & Reel) 2500 parts per reel
ST232CDR -40 to 85 oC SO-16 Large (Tube) 2500 parts per reel
ST232BDR 0 to 70 oC SO-16 Large (Tube) 49 parts per tube / 25 tube per box
ST232CW -40 to 85 oC SO-16 Large (Tape & Reel) 49 parts per tube / 25 tube per box
ST232BW 0 to 70 oC SO-16 Large (Tape & Reel) 1000 parts per reel
ST232CWR -40 to 85 oC TSSOP16 (Tube) 1000 parts per reel
ST232BWR 0 to 70 oC TSSOP16 (Tube)
ST232CT -40 to 85 oC TSSOP16 (Tape & Reel) only for samples
ST232BT 0 to 70 oC TSSOP16 (Tape & Reel) only for samples
ST232CTR -40 to 85 oC 2500 parts per reel
ST232BTR 2500 parts per reel
February 2001 1/11
ST232
PIN CONFIGURATION
PIN DESCRIPTION SY M BO L NAME AND FUNCTION
C1+ Positive Terminal for the first Charge Pump Capacitor
PIN No V+ Doubled Voltage Terminal
1 C1- Negative Terminal for the first Charge Pump Capacitor
2 C2+ Positive Terminal for the second Charge Pump Capacitor
3 C2- Negative Terminal for the second Charge Pump Capacitor
4 V- Inverted Voltage Terminal
5 Second Transmitter Output Voltage
6 T2OUT Second Receiver Input Voltage
7 R2IN Second Receiver Output Voltage
8 R2OUT Second Transmitter Input Voltage
9 T2IN First Transmitter Input Voltage
10 T1IN First Receiver Output Voltage
11 R1OUT First Receiver Input Voltage
12 R1IN First Transmitter Output Voltage
13 T1OUT Ground
14 GND Supply Voltage
15 VCC
16
ABSOLUTE MAXIMUM RATINGS (Note 1)
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 oC
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
Note1: No external supply can be applied toV+ terminal and V- terminal.
2/11
ST232
ELECTRICAL CHARACTERISTICS
(C1 -C4 = 0.1F, VCC = 5V 10% TA = -40 to 85 oC, unless otherwise specified.
Typical Valus are referred to TA = 25 oC)
Symb ol Parameter T est Cond it ion s Va l u e Un it
No Load, TA = 25 oC T yp. mA
Min. Max.
5 10
ISUPPLY VCC Power Supply Current
TRANSMITTER ELECTRICAL CHARACTERISTICS
(C1 -C4 = 0.1F, VCC = 5V 10%, TA = -40 to 85 oC, unless otherwise specified.
Typical Valus are referred to TA = 25 oC)
Symb ol Parameter T est Cond it ion s Va l u e Un it
VTOUT Output Voltage Swing All Transmitter outputs are Min. T yp. Max. V
loaded with 3K to GND 5 7.8 200
0.8 A
ITIL Logic Pull-Up Current TIN = 0 V 15 30 V
V
VTIL Input Logic Threshold Low 60 V/s
VTIH Input Logic Threshold High 2 Kbits/s
SRT Transition Slew Rate
TA = 25 oC, VCC = 5 V, 7
mA
RL = 3 to 7 K,
CL= 50 to 2500 pF (Note 1)
DR Data Rate (Note 2) 120 220
RTOUT Transmitter Output Resistance VCC = V+ = V- = 0V 300
VOUT = 2 V
ISC Transmitter Output Short Circuit one TXOUT to GND 10
Current
Note 1: Measured from 3V to -3Vor from -3V to 3V.
Note 2: One trasmitter output is loaded with RL = 3K to7K, CL = 50 to 1000pF
RECEIVER ELECTRICAL CHARACTERISTICS
(C1 -C4 = 0.1F, VCC = 5V 10%, TA = -40 to 85 oC, unless otherwise specified.
Typical Valus are referred to TA = 25 oC)
Symb ol Parameter T est Cond it ion s Va l u e Un it
Min. Typ. Max. V
30
VRIN Receiver Input Voltage Operating -30 7 K
RRIN Range
TA = 25 oC, VCC = 5 V, 3 5 2.4 V
RS-232 Input Resistance VRIN = 5 V 1 V
TA = 25 oC, VCC = 5 V 0.4 V
VRIL RS-232 Input Logic Threshold Low TA = 25 oC, VCC = 5 V 0.8 1.2 V
VRIH RS-232 Input Logic Threshold High VCC = 5 V 1 V
VRIHYS RS-232 Input Hysteresis 1.7 s
VROL TTL/CMOS Output Voltage Low IOUT = 3.2mA (to VCC) mA
VROH TTL/CMOS Output Voltage High 0.2 0.5
tdR Propagation Delay Time IOUT = 1mA (to GND)
ISCR Receiver Output Short Circuit Current CL=150pF (Note 1) 3.5 VCC-0.4
0.3
Note 1: RS-232 IN to TTL-CMOS OUT (from 50% to 50%) 10
3/11
ST232
APPLICATION CIRCUITS (note 1, note 2)
+5V INPUT
C3 +
+
C5
1 16 2 +10V
C1+ Vcc V+
C1 + +5V TO +10V V- 6 -10V
3 C1- VOLTAGE
4 C2+ DOUBLER C4 +
C2 + +10V TO -10V
VOLTAGE
5 C2- INVERTER
+5V
TTL / CMOS INPUTS 11 T1IN 400K T1OUT 14 RS 232 OUTPUTS
10 T2IN T1 T2OUT 7
+5V
400K
T2
12 R1OUT R1 R1IN 13
5K
TTL / CMOS OUTPUTS R2IN 8 RS 232 INPUTS
5K
9 R2OUT R2
GND
15
Note 1: C1-4 capacitors can even be 1 F ones.
Note 2: C1-4 canbe common or biased capacitors.
Capacitance Value (F)
C1 C2 C3 C4 C5
0.1 0.1 0.1 0.1 0.1
4/11
ST232
Supply Current vs Temperature Data Rate vs Temperature
Receiver Propagation Delay Driver Propagation Delay
High Level Output Voltage Swing vs Temperature Low Level Output Voltage Swing vs Temperature
5/11
ST232 Low Level Trasmitter Output Short Circuit
Current vs Temperature
High Level Trasmitter Output Short Circuit
Current vs Temperature
High Level Receiver Output Short Circuit Current Low Level Receiver Output Short Circuit Current
vs Temperature vs Temperature
6/11
ST232
Plastic DIP-16 (0.25) MECHANICAL DATA
DIM. MIN. mm MAX. MIN. inch MAX.
0.51 TYP. 1.65 0.020 TYP. 0.065
a1 0.77 0.030
B 0.5 20 0.020 0.787
b 0.25 0.010
b1 8.5 7.1 0.335 0.280
D 2.54 5.1 0.100 0.201
E 17.78 1.27 0.700 0.050
e
e3 3.3 0.130
F
I
L
Z
P001C
7/11
ST232 SO-16 MECHANICAL DATA
DIM. MIN. mm MAX. MIN. inch MAX.
0.1 TYP. 1.75 TYP. 0.068
A 0.35 0.2 0.004 0.007
a1 0.19 0.5 1.65 0.019 0.064
a2 0.46 0.013 0.018
b 9.8 1.27 0.25 0.007 0.050 0.010
b1 5.8 8.89 0.350
C 45 (typ.) 0.393
c1 3.8 0.244
D 4.6 10 0.385
E 0.5 0.157
e 6.2 0.228 0.208
e3 0.050
F 4.0 0.149 0.024
G
L 5.3 0.181
M
S 1.27 0.019
0.62
8 (max.)
P013H
8/11
SO16L MECHANICAL DATA ST232
DIM. MIN. mm MAX. MIN. inch MAX.
0.1 TYP. 2.65 TYP. 0.104
A 0.35 0.2 0.004 0.008
a1 0.23 0.5 2.45 0.020 0.096
a2 0.49 0.014 0.019
b 10.1 1.27 0.32 0.009 0.050 0.012
b1 10.0 8.89 0.350
C 45 (typ.) 0.413
c1 7.4 0.419
D 0.5 10.5 0.397
E 0.300
e 10.65 0.3.93 0.050
e3 0.029
F 7.6 0.291
L
M 1.27 0.020
S
0.75
8 (max.)
P013I
9/11
ST232 TSSOP16 MECHANICAL DATA
DIM. MIN. mm MAX. MIN. inch MAX.
TYP. 1.1 TYP. 0.433
A 0.05 0.15 0.002 0.006
A1 0.85 0.10 0.95 0.335 0.004 0.374
A2 0.19 0.9 0.30 0.0075 0.354 0.0118
b 0.09 0.20 0.0035 0.0079
c 4.9 5 5.1 0.193 0.197 0.201
D 6.25 6.4 6.5 0.246 0.252 0.256
E 4.3 4.4 4.48 0.169 0.173 0.176
E1 0.65 BSC 0.0256 BSC
e 0o 4o 8o 0o 8o
K 0.50 0.60 0.70 0.020 4o 0.028
L 0.024
A A2
A1 b e K L
c E
D
E1
PIN 1 IDENTIFICATION
1
10/11
ST232
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in life support devices or systems withoutexpress written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
2001 STMicroelectronics Printed in Italy All Rights Reserved
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.
11/11
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