ST202B
ST202C
5 V powered multi-channel RS-232 drivers and receivers
Features
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■
■
■
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Supply voltage range: 4.5 to 5.5 V
Supply current no load (typ.): 1.5 mA
Transmitter output voltage swing (Typ): ± 9 V
Transition slew rate (typ.): 12 V/ms
Receiver propagation delay (typ.): 0.1 ms
Compatible with MAX202
Receiver input voltage range: ± 30 V
Data rate (typ.): 400 kbps/s
Operating temperature range:
-40 to 85 °C, 0 to 70 °C
TSSOP
SOP
SOP Large
Description
The ST202 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 ST202 uses a
single 5 V power supply and only four external
capacitors (0.1 µF). Typical application are in:
portable computers, low power modems,
interfaces translation, battery powered RS-232
networks.
Table 1.
Device summary
Temperature range
-40 to 85 °C
0 to 70 °C
-40 to 85 °C
0 to 70 °C
0 to 70 °C
-40 to 85 °C
Package
SO-16 (tube)
SO-16 (tape and reel)
SO-16 (tape and reel)
SO-16 Large (tape and reel)
TSSOP16 (tape and reel)
TSSOP16 (tape and reel)
Packaging
50 parts per tube / 20 tube per box
2500 parts per reel
2500 parts per reel
1000 parts per reel
2500 parts per reel
2500 parts per reel
Order code
ST202BD
ST202CDR
ST202BDR
ST202CWR
ST202CTR
ST202BTR
February 2008
Rev 8
1/17
www.st.com
17
ST202B - ST202C
Contents
1
2
3
4
5
6
7
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/17
ST202B - ST202C
Pin configuration
1
Figure 1.
Pin configuration
Pin connections (top view)
Table 2.
Pin n°
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin description
Symbol
C
1
+
V+
C
1
-
C
2
+
C
2
-
V-
T2
OUT
R2
IN
R2
OUT
T2
IN
T1
IN
R1
OUT
R1
IN
T1
OUT
GND
V
CC
Note
Positive terminal for the first charge pump capacitor
Doubled voltage terminal
Negative terminal for the first charge pump capacitor
Positive terminal for the second charge pump capacitor
Negative terminal for the second charge pump capacitor
Inverted voltage terminal
Second transmitter output voltage
Second receiver input voltage
Second receiver output voltage
Second transmitter input voltage
First transmitter input voltage
First receiver output voltage
First receiver input voltage
First transmitter output voltage
Ground
Supply voltage
3/17
Maximum ratings
ST202B - ST202C
2
Table 3.
Symbol
V
CC
V+
V-
T
IN
R
IN
T
OUT
R
OUT
T
SCTOUT
Maximum ratings
Absolute maximum ratings
Parameter
Supply voltage
Extra positive voltage
Extra negative voltage
Transmitter input voltage range
Receiver input voltage range
Transmitter output voltage range
Receiver output voltage range
Short circuit duration on T
OUT
Value
-0.3 to 6
(V
CC
-0.3) to 13.2
0.3 to -13.2
-0.3 to (V
CC
+ 0.3)
±
30
±
15
-0.3 to (V
CC
+ 0.3)
infinite
Unit
V
V
V
V
V
V
V
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
4/17
ST202B - ST202C
Electrical characteristics
3
Table 4.
Electrical characteristics
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).
Parameter
V
CC
power supply current
No Load
Test condition
Min.
Typ.
1.5
Max.
4
Unit
mA
Symbol
I
SUPPLY
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).
Parameter
Output voltage swing
Logic pull-up current
Input logic threshold low
Input logic threshold high
Transition slew rate
Data rate
Transmitter output resistance
Transmitter output short circuit
current
Propagation delay time
T
A
= 25°C, V
CC
= 5V
R
L
= 3 to 7kΩ C
L
= 50 to 2500pF
(1)
,
(2)
Symbol
V
TOUT
I
TIL
V
TIL
V
TIH
SR
T
D
R
R
TOUT
I
SC
t
DT
Test condition
All transmitter outputs are loaded
with 3kΩ to GND
T
IN
= 0V
Min.
±
5
Typ.
±
9
5
Max.
Unit
V
40
µA
V
0.8
1.4
1.4
2
30
V
V/µs
kbits/s
Ω
6
200
300
±
7
12
400
V
CC
= V+ = V- = 0V V
OUT
=
±
2V
One T
XOUT
to GND
TTL-CMOS IN to RS-232 OUT
C
L
= 150pF (50% to 50%)
±
22
1.3
3.5
mA
µs
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 kΩ to 7 kΩ, C
L
= 50 to 1000 pF
5/17
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