ST232A
VERY HIGHSPEED, ULTRA LOWPOWERCONSUMPTION
5V POWERED RS-232 DRIVERS AND RECEIVERS
October 1999
■SUPPLYVOLTAGERANGE: 4.5TO5.5V
■SUPPLYCURRENT NOLOAD(TYP):1.5mA
■TRANSMITTEROUTPUTVOLTAGESWING
(TYP):±9V
■TRANSITIONSLEWRATE (TYP.):12V/µs
■RECEIVERPROPAGATIONDELAY
(TYP.):0.1µs
■RECEIVERINPUTVOLTAGERANGE:
±30V
■DATARATE(TYP):400Kbp/s
■OPERATINGTEMPERATURE RANGE:
-40TO85oC,0 TO70 oC
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 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
ST232ACN 0 to 70 oC DIP-16 25 parts per tube / 40 tubeper box
ST232ABN -40 to 85 oC DIP-16 25 parts per tube / 40 tubeper box
ST232ACD 0 to 70 oC SO-16 (Tube) 50 parts per tube / 20 tubeper box
ST232ABD -40 to 85 oC SO-16 (Tube) 50 parts per tube / 20 tubeper box
ST232ACDR 0 to 70 oC SO-16 (Tape& Reel) 2500 parts per reel
ST232ABDR -40 to 85 oC SO-16 (Tape& Reel) 2500 parts per reel
ST232ACW 0 to 70 oC SO-16 Large (Tube) 50 parts per tube / 20 tubeper box
ST232ABW -40 to 85 oC SO-16 Large (Tube) 50 parts per tube / 20 tubeper box
ST232ACWR 0 to 70 oC SO-16 Large (Tape & Reel) 1000 parts per reel
ST232ABWR -40 to 85 oC SO-16 Large (Tape & Reel) 1000 parts per reel
ST232ACTR 0 to 70 oC TSSOP16 (Tape & Reel) 2500 parts per reel
ST232ABTR -40 to 85 oC TSSOP16 (Tape & Reel) 2500 parts per reel
1/10
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
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
AbsoluteMaximumRatingsarethosevaluesbeyond whichdamagetothedevicemayoccur. Functional operationunderthese condition isnot implied.
ST232A
2/10
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±9V
I
TIL Logic Pull-Up Current TIN =0V 5 40 µ
A
V
TIL Input Logic Threshold Low 0.8 1.4 V
VTIH Input Logic Threshold High 1.4 2 V
SRTTransition Slew Rate TA=25o
C, VCC =5V,
R
L=3to7KΩ,
C
L
= 50 to 2500 pF (Note 1)
61230V/
µ
s
D
R
Data Rate (Note 2) 200 400 Kbits/s
RTOUT Transmitter Output Resistance VCC = V+ = V- = 0V
VOUT =±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= 150 pF (50% to 50%) 1.3 3.5 µs
Note1:Measured from3Vto-3Vor from-3Vto3V.
Note 2: One trasmitter output is loaded with RL=3KΩto7KΩ,CL= 50to1000pF
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 1.5 4 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, 357K
Ω
V
RIL RS-232 Input Logic Threshold Low 0.8 1.3 V
VRIH RS-232 Input Logic Threshold High 1.8 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) 0.2 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
Note1:RS-232 INtoTTL-CMOSOUT(from50% to50%)
ST232A
3/10
APPLICATION CIRCUITS (note 1, note 2)
C4 +
C1 +C1+
C1-
3
C2 +C2+
C2-
4
5
11
10
12
9
TTL / CMOS OUTPUTS
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 orbiased capacitors.
ST232A
4/10
DriverVoltage Transfer Characteristics
DriverShort CircuitOutputCurrentvs
Temperature
ReceiverThresholdvs SupplyVoltage
DriverOutput Current vs OutputVoltage
DriverShort CircuitSupplyCurrent vs
Temperature
ReceiverThresholdvs Temperature
ST232A
5/10
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
6/10
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
7/10
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
8/10
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 0.0256 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
ST232A
9/10
Information furnished isbelieved tobe accurate and reliable. However, STMicroelectronics assumes no responsibility forthe 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 tochange without notice. Thispublication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in lifesupport devices or systems withoutexpress written approval of STMicroelectronics.
The ST logo is a registeredtrademark of STMicroelectronics
1999 STMicroelectronics – Printed in Italy– All RightsReserved
STMicroelectronics GROUP OF COMPANIES
Australia- Brazil- China - Finland - France - Germany - Hong Kong - India - Italy - Japan- Malaysia - Malta - Morocco
Singapore - Spain- Sweden - Switzerland - United Kingdom - U.S.A.
http://www.st.com
.
ST232A
10/10
