ST ST202EB, ST202EC, ST232EB, ST232EC User Manual

± 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

■ Guaranteed slew rate range 3 to 30 V/ms

■ 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

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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

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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.

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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

2µA

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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