STMicroelectronics ST202EB, ST202EC, ST232EB, ST232EC Technical data

± 15 kV ESD protected 5 V RS-232 transceiver
Features
ESD protection for RS-232 I/O pins:
± 15 kV human body model
Guaranteed 230 kbps date rate
Operate from a single 5 V power supply
Description
The ST202E/ST232E are a 2 driver 2 receiver devices designed for RS-232 and V.28 communications in harsh environments. Each transmitter output and receiver input is protected against ± 15 kV electrostatic discharge (ESD) shocks. The drivers meet all EIA/TIA-232E and CCITT V.28 specifications at data rates up to 230 kbps, when loaded in accordance with the EIA/TIA-232E specification. The ST202E/232E use a single 5 V supply voltage.
ST202EB - ST202EC ST232EB - ST232EC
SOP
TSSOP
SOP Large
The ST232E operates with four 1 µF capacitors, while the ST202E operates with four 0.1 µF capacitors, further reducing cost and board space.

Table 1. Device summary

Order codes
ST202ECDR ST232ECDR 0 to 70 °C SO-16 (tape & reel) 2500 parts per reel
ST202EBDR ST232EBDR -40 to 85 °C SO-16 (tape & reel) 2500 parts per reel
ST232ECWR 0 to 70 °C SO-16 large (tape & reel) 1000 parts per reel
ST202EBWR -40 to 85 °C SO-16 large (tape & reel) 1000 parts per reel
ST202ECTR ST232ECTR 0 to 70 °C TSSOP16 (tape & reel) 2500 parts per reel
ST202EBTR ST232EBTR -40 to 85 °C TSSOP16 (tape & reel) 2500 parts per reel
Temperature
range
Packages Packaging
February 2008 Rev 16 1/18
www.st.com
18
ST202EB - ST202EC - ST232EB - ST232EC
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2/18
ST202EB - ST202EC - ST232EB - ST232EC Pin configuration

1 Pin configuration

Figure 1. Pin connections (top view)

Table 2. Pin description

Pin n° Symbol Note
1C
2 V+ Doubled voltage terminal
3C
4C
5C
6 V- Inverted voltage terminal
7T2
8R2
9R2
10 T2
11 T1
12 R1
13 R1
14 T1
15 GND Ground
16 V
+ Positive terminal for the first charge pump capacitor
1
- Negative terminal for the first charge pump capacitor
1
+ Positive terminal for the second charge pump capacitor
2
- Negative terminal for the second charge pump capacitor
2
OUT
OUT
OUT
OUT
CC
Second transmitter output voltage
Second receiver input voltage
IN
Second receiver output voltage
Second transmitter input voltage
IN
First transmitter input voltage
IN
First receiver output voltage
First receiver input voltage
IN
First transmitter output voltage
Supply voltage
3/18
Maximum ratings ST202EB - ST202EC - ST232EB - ST232EC

2 Maximum ratings

Table 3. Absolute maximum ratings

Symbol Parameter Value Unit
V
CC
V+ Extra positive voltage (V
Supply voltage -0.3 to 6 V
-0.3) to 14 V
CC
V- Extra negative voltage -14 to 0.3 V
T
R
T
OUT
R
OUT
T
SCTOUT
T
STG
IN
IN
Transmitter input voltage range -0.3 to (V+ + 0.3) V
Receiver input voltage range ± 30 V
Transmitter output voltage range (V- - 0.3) to (V+ + 0.3) V
Receiver output voltage range -0.3 to (VCC + 0.3) V
Short circuit duration on T
OUT
infinite
Storage temperature range -65 to 150 °C
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
4/18
ST202EB - ST202EC - ST232EB - ST232EC Electrical characteristics

3 Electrical characteristics

Table 4. ESD performance: transmitter outputs, receiver inputs
Symbol Parameter Test condition Min. Typ. Max. Unit
ESD ESD protection voltage Human Body Model ± 15 kV
ESD ESD protection voltage IEC 1000-4-2 (Contact Discharge) ± 6kV
ESD ESD protection voltage IEC 1000-4-2 (Air Discharge) ± 8kV
Note: All test versus GND.
Table 5. Electrical characteristics
(C
- C4 = 0.1 µF for ST202E, C1 - C4 = 0.1 µF for ST232E, VCC = 5 V ± 10 %,
1
= -40 to 125 °C, unless otherwise specified. Typical values are referred to TA = 25 °C).
T
A
Symbol Parameter Test condition Min. Typ. Max. Unit
I
SUPPLY
VCC power supply current No Load, TA = 25°C 5 10 mA
Table 6. Transmitter electrical characteristics
(C
- C4 = 0.1 µF, VCC = 5 V ± 10 %, TA = -40 to 85 °C, unless otherwise specified. Typical
1
values are referred to T
Symbol Parameter Test condition Min. Typ. Max. Unit
V
R
TOUT
I
TIL
V
V
TIH
SR
D
TOUT
I
SC
t
DT
Output voltage swing
Input leakage current ± 10 µA
Input logic threshold low 0.8 V
TIL
Input logic threshold high 2 V
Transition slew rate
T
Data rate
R
Transmitter output resistance VCC = V+ = V- = 0V V
Transmitter output short circuit current
Transmitter propagation delay
= 25 °C).
A
All Transmitter outputs are loaded with 3 kΩ to GND
= 25°C, VCC = 5 V RL = 3 to 7
T
A
KΩ, CL = 50 to 1000 pF
R
= 3 to 7 kΩ, CL = 50 to 1000 pF
L
one transmitter switching
= 3 to 7 kΩ, CL = 50 to 2500 pF
R
L
All transmitter loaded
± 5 ± 9V
(1)
3630V/µs
230 400 kbits/s
= ± 2 V 300 Ω
OUT
±10 ±60 mA
A
1. Measured from 3 V to -3 V or from -3 V to 3 V
2. One transmitter output is loaded with R
= 3 kΩ to 7 kΩ, CL = 50 to 1000 pF
L
5/18
Electrical characteristics ST202EB - ST202EC - ST232EB - ST232EC
Table 7. Receiver electrical characteristics
(C
- C4 = 0.1 µF, VCC = 5 V ± 10 %, TA = -40 to 85 °C, unless otherwise specified. Typical
1
values are referred to T
Symbol Parameter Test condition Min. Typ. Max. Unit
= 25 °C).
A
V
R
V
V
V
RIHYS
V
V
t
RIN
RIN
RIL
RIH
ROL
ROH
DR
Receiver input voltage operating range
-30 30 V
RS-232 input resistance TA = 25°C, VCC = 5 V 3 5 7 kΩ
RS-232 input logic threshold low
RS-232 input logic threshold high
T
= 25°C, VCC = 5 V 0.8 1.2 V
A
= 25°C, VCC = 5 V 1.7 2.4 V
T
A
RS-232 input hysteresis VCC = 5 V 0.2 0.5 1 V
TTL/CMOS output voltage low I
TTL/CMOS output voltage high I
= 3.2 mA 0.4 V
OUT
= -1 mA 3.5 VCC-0.4 V
OUT
Receiver propagation delay CL = 150 pF 0.5 10 µs
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