ST232c.pdf

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5 V powered multi-channel RS-232 drivers and receivers
ST232B
ST232C
5 V powered multi-channel RS-232 drivers and receivers
Features
■
Supply voltage range: 4.5 to 5.5 V
■
Supply current no load (typ.): 5 mA
■
Transmitter output voltage swing (typ): ±7.8 V
■
Controlled output slew rate
DIP
SOP
■
Receiver input voltage range: ± 30 V
■
Data rate (typ.): 220 kbps
■
Operating temperature range:
– -40 ° to 85 °C
– 0 ° to 70 °C
SOP Large
TSSOP
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 ±12 V is not available. The ST232 uses a
single 5 V power supply and only four external
capacitors (0.1 µF). Typical applications are in:
portable computers, low power modems,
interfaces translation, battery powered RS-232
system, multi-drop RS-232 networks.
Table 1.
Device summary
Order code
Temperature
range
Package
Packaging
ST232CN
0 to 70 °C
DIP-16
25 parts per tube / 40 tube per box
ST232CDR
0 to 70 °C
SO-16 (tape and reel)
2500 parts per reel
ST232BDR
-40 to 85 °C
SO-16 (tape and reel)
2500 parts per reel
ST232CWR
0 to 70 °C
SO-16 Large (tape and reel)
1000 parts per reel
ST232BWR
-40 to 85 °C
SO-16 Large (tape and reel)
1000 parts per reel
ST232CTR
0 to 70 °C
TSSOP16 (tape and reel)
2500 parts per reel
ST232BTR
-40 to 85 °C
TSSOP16 (tape and reel)
2500 parts per reel
February 2008
Rev 14
1/19
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389214639.007.png 389214639.008.png 389214639.009.png 389214639.010.png
ST232B - ST232C
Contents
1
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2/19
389214639.001.png
ST232B - ST232C
Pin configuration
1
Pin configuration
Figure 1. Pin connections (top view)
Table 2.
Pin description
Pin n°
Symbol
Note
1
C 1 +
Positive terminal for the first charge pump capacitor
2
V+
Doubled voltage terminal
3
C 1 -
Negative terminal for the first charge pump capacitor
4
C 2 +
Positive terminal for the second charge pump capacitor
5
C 2 -
Negative terminal for the second charge pump capacitor
6
V-
Inverted voltage terminal
7
T2 OUT
Second transmitter output voltage
8
R2 IN
Second receiver input voltage
9
R2 OUT
Second receiver output voltage
10
T2 IN
Second transmitter input voltage
11
T1 IN
First transmitter input voltage
12
R1 OUT
First receiver output voltage
13
R1 IN
First receiver input voltage
14
T1 OUT
First transmitter output voltage
15
GND
Ground
16
V CC
Supply voltage
3/19
389214639.002.png 389214639.003.png
Maximum ratings
ST232B - ST232C
2
Maximum ratings
Table 3.
Absolute maximum ratings
Symbol
Parameter
Value
Unit
V CC
Supply voltage
-0.3 to 6
V
T IN
Transmitter input voltage range
-0.3 to (V CC + 0.3)
V
R IN
Receiver input voltage range
± 30
V
T OUT
Transmitter output voltage range
(V + + 0.3) to (V - - 0.3)
V
R OUT
Receiver output voltage range
-0.3 to (V CC + 0.3)
V
T SCTOUT
Short circuit duration on T OUT
infinite
T STG
Storage temperature range
-65 to + 150
Note: 1 Absolute maximum ratings are those values beyond which damage to the device may
occur. Functional operation under these condition is not implied.
2 No external supply can be applied to V+ terminal and V- terminal.
4/19
389214639.004.png 389214639.005.png
ST232B - ST232C
Electrical characteristics
3
Electrical characteristics
Table 4.
Electrical characteristics
(C 1 - C 4 = 0.1 µF, V CC = 5 V ± 10 %, T A = -40 to 85 °C, unless otherwise specified. Typical
values are referred to T A = 25 °C).
Symbol
Parameter
Test condition
Min. Typ. Max.
Unit
I SUPPLY
V CC Power supply current
No Load, T A = 25°C
5
10
mA
Table 5.
Transmitter electrical characteristics
(C 1 - C 4 = 0.1 µF, V CC = 5 V ± 10 %, T A = -40 to 85 °C, unless otherwise specified. Typical
values are referred to T A = 25 °C).
Symbol
Parameter
Test condition
Min. Typ. Max. Unit
V TOUT Output voltage swing
All transmitter outputs are loaded
with 3k
Ω
to GND
± 5
± 7.8
V
I TIL
Input leakage current
±
40
µA
V TIL
Input logic threshold low
0.8
V
V TIH
Input logic threshold high
2
V
SR T
Transition slew rate
T A = 25°C, V CC = 5V
R L = 3 to 7k
, C L = 50 to 2500pF (1)
7
30
/µs
D R
Data rate
(2)
120
220
kbits/s
R TOUT Transmitter output resistance
V CC = V+ = V- = 0V V OUT =
2V
300
Ω
I SC
Transmitter output short circuit
current
One T XOUT to GND
± 10
± 60
mA
1. Measured from 3 V to -3 V or from -3 V to 3 V
2. One transmitter output is loaded with R L = 3 k Ω to 7 k Ω , C L = 50 to 1000 pF
5/19
Ω
±
389214639.006.png

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