ST232
5V POWERED MULTI-CHANNEL
RS-232 DRIVERS AND RECEIVERS
February 2001
■SUPPLYVOLTAGERANGE: 4.5TO5.5V
■SUPPLYCURRENT NOLOAD(TYP):5mA
■TRANSMITTEROUTPUTVOLTAGESWING
(TYP):±7.8V
■CONTROLLEDOUTPUTSLEWRATE
■RECEIVERINPUTVOLTAGERANGE:
±30V
■DATARATE(TYP):220Kbps
■OPERATINGTEMPERATURE RANGE:
-40TO85oC,0TO70 oC
■COMPATIBLEWITHMAX232ANDMAX202
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
System,Multi-Drop RS-232 Networks.
D
(Micro Package)
N
(Plastic Package)
W
(Micro Package Large) T
(TSSOPPackage)
ORDER CODES
Type Temperature
Range Package Comments
ST232CN 0 to 70 oC DIP-16 25 parts per tube / 40 tube per box
ST232BN -40 to 85 oC DIP-16 25 parts per tube / 40 tube per box
ST232CD 0 to 70 oC SO-16 (Tube) 50 parts per tube / 20 tube per box
ST232BD -40 to 85 oC SO-16 (Tube) 50 parts per tube / 20 tube per box
ST232CDR 0 to 70 oC SO-16 (Tape & Reel) 2500 parts per reel
ST232BDR -40 to 85 oC SO-16 (Tape & Reel) 2500 parts per reel
ST232CW 0 to 70 oC SO-16 Large (Tube) 49 parts per tube / 25 tube per box
ST232BW -40 to 85 oC SO-16 Large (Tube) 49 parts per tube / 25 tube per box
ST232CWR 0 to 70 oC SO-16 Large (Tape & Reel) 1000 parts per reel
ST232BWR -40 to 85 oC SO-16 Large (Tape & Reel) 1000 parts per reel
ST232CT 0 to 70 oC TSSOP16 (Tube) only for samples
ST232BT -40 to 85 oC TSSOP16 (Tube) only for samples
ST232CTR 0 to 70 oC TSSOP16 (Tape & Reel) 2500 parts per reel
ST232BTR -40 to 85 oC TSSOP16 (Tape & Reel) 2500 parts per reel
1/11
PIN CONFIGURATION
PIN DESCRIPTION
PIN No SYMBOL NAME AND FUNCTION
1C
1
+ Positive Terminal for the first Charge Pump Capacitor
2 V+ Doubled Voltage Terminal
3C
1
- Negative Terminal for the first Charge Pump Capacitor
4C
2
+ Positive Terminal for the second Charge Pump Capacitor
5C
2
- Negative Terminal for the second Charge Pump Capacitor
6 V- Inverted Voltage Terminal
7T2
OUT Second Transmitter Output Voltage
8R2
IN Second Receiver Input Voltage
9R2
OUT 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
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
AbsoluteMaximum Ratingsarethosevaluesbeyond whichdamagetothedevicemayoccur. Functional operationunderthese condition isnot implied.
Note1:Noexternal supply can beappliedtoV+terminal and V- terminal.
ST232
2/11
TRANSMITTER ELECTRICAL CHARACTERISTICS
(C1-C4= 0.1µF, VCC =5V±10%, TA= -40 to 85 oC, unless otherwise specified.
Typical Valus are referred to TA=25o
C)
Symbol Parameter Test Conditions Value Unit
Min. Typ. Max.
VTOUT Output Voltage Swing All Transmitter outputs are
loaded with 3KΩto GND ±5±7.8 V
ITIL Logic Pull-Up Current TIN = 0 V 15 200 µA
VTIL Input Logic Threshold Low 0.8 V
VTIH Input Logic Threshold High 2 V
SRTTransition Slew Rate TA=25o
C, VCC =5V,
R
L=3to7KΩ,
C
L
= 50 to 2500 pF (Note 1)
730V/
µ
s
D
R
Data 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
Note1:Measured from3Vto-3Vorfrom-3Vto3V.
Note 2: One trasmitter output is loaded with RL=3K
Ωto7KΩ,CL= 50to 1000pF
ELECTRICAL CHARACTERISTICS
(C1-C4= 0.1µF, VCC =5V±10% TA= -40to 85 oC, unlessotherwise specified.
Typical Valus are referred to TA=25o
C)
Symbol Parameter Test Conditions Value Unit
Min. Typ. Max.
ISUPPLY VCC Power Supply Current No Load, TA=25o
C 5 10 mA
RECEIVERELECTRICAL CHARACTERISTICS
(C1-C4= 0.1µF, VCC =5V±10%, TA= -40 to 85 oC, unless otherwise specified.
Typical Valus are referred to TA=25o
C)
Symbol Parameter Test Conditions Value Unit
Min. Typ. Max.
VRIN Receiver Input Voltage Operating
Range -30 30 V
RRIN RS-232 Input Resistance TA=25o
C, VCC =5V,
V
RIN =5V 357K
Ω
V
RIL RS-232 Input Logic Threshold Low TA=25o
C, VCC = 5 V 0.8 1.2 V
VRIH RS-232 Input Logic Threshold High TA=25o
C, VCC = 5 V 1.7 2.4 V
VRIHYS RS-232 Input Hysteresis VCC = 5 V 0.2 0.5 1 V
VROL TTL/CMOS Output Voltage Low IOUT = 3.2mA (to VCC) 0.4 V
VROH TTL/CMOS Output Voltage High IOUT = 1mA (to GND) 3.5 VCC-0.4 V
tdR Propagation Delay Time CL=150pF (Note 1) 0.3 1 µs
ISCR Receiver Output Short Circuit Current ±10 mA
Note1:RS-232INtoTTL-CMOSOUT(from50% to50%)
ST232
3/11
APPLICATION CIRCUITS (note 1, note2)
C4 +
C1 +C1+
C1-
3
C2 +C2+
C2-
4
5
11
10
12
9
TTL / CMOSOUTPUTS
TTL / CMOS INPUTS
V- 6
C5 +
+
C3
+5V INPUT
116
Vcc V+ 2+10V
-10V
RS 232OUTPUTS
RS 232INPUTS
14
7
13
8
15
GND
5K
5K
+5VTO +10V
VOLTAGE
DOUBLER
+10VTO -10V
VOLTAGE
INVERTER
+5V
400K T1OUTT1IN +5V
400K
T2IN T2OUT
T1
T2
R2IN
R1IN
R2OUT
R1OUT R1
R2
CapacitanceValue (µF)
C1 C2 C3 C4 C5
0.1 0.1 0.1 0.1 0.1
Note1:C1-4capacitorscan even be1 µFones.
Note2:C1-4canbecommon or biased capacitors.
ST232
4/11
SupplyCurrent vs Temperature
ReceiverPropagationDelay
HighLevel Output VoltageSwing vs Temperature
DataRate vs Temperature
DriverPropagation Delay
Low LevelOutput Voltage Swing vs Temperature
ST232
5/11
HighLevel Trasmitter OutputShort Circuit
Current vs Temperature
HighLevel ReceiverOutput Short Circuit Current
vs Temperature
Low LevelTrasmitter OutputShort Circuit
Current vs Temperature
Low LevelReceiver Output Short CircuitCurrent
vs Temperature
ST232
6/11
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
ST232
7/11
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
ST232
8/11
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
ST232
9/11
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 0.0256 BSC
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
ST232
10/11
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ST232
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