ST ST202B, ST202C User Manual

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.): 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

SOP

ST202B
ST202C

SOP Large

TSSOP

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

Order code Temperature range Package Packaging

ST202BD -40 to 85 °C SO-16 (tube) 50 parts per tube / 20 tube per box

ST202CDR 0 to 70 °C SO-16 (tape and reel) 2500 parts per reel

ST202BDR -40 to 85 °C SO-16 (tape and reel) 2500 parts per reel

ST202CWR 0 to 70 °C SO-16 Large (tape and reel) 1000 parts per reel

ST202CTR 0 to 70 °C TSSOP16 (tape and reel) 2500 parts per reel

ST202BTR -40 to 85 °C TSSOP16 (tape and reel) 2500 parts per reel

February 2008 Rev 8 1/17

www.st.com

17

ST202B - ST202C

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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ST202B - ST202C 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 ST202B - ST202C

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 13.2 V

CC

V- Extra negative voltage 0.3 to -13.2 V

T

R

T

OUT

R

OUT

T

SCTOUT

IN

IN

Transmitter input voltage range -0.3 to (VCC + 0.3) V

Receiver input voltage range ± 30 V

Transmitter output voltage range ± 15 V

Receiver output voltage range -0.3 to (VCC + 0.3) V

Short circuit duration on T

OUT

infinite

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 Electrical characteristics

Table 4. 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

I

SUPPLY

VCC power supply current No Load 1.5 4 mA

Table 5. 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

TOUT

I

V

V

SR

D

R

TOUT

I

t

1. Measured from 3 V to -3 V or from -3 V to 3 V

2. One transmitter output is loaded with R

Output voltage swing

Logic pull-up current TIN = 0V 5 40 µA

TIL

Input logic threshold low 0.8 1.4 V

TIL

Input logic threshold high 1.4 2 V

TIH

Transition slew rate

T

Data rate

R

Transmitter output resistance VCC = V+ = V- = 0V V

Transmitter output short circuit

SC

current

Propagation delay time

DT

= 25 °C).

A

All transmitter outputs are loaded
with 3kΩ to GND

= 25°C, VCC = 5V

T

A

RL = 3 to 7kΩ, CL = 50 to 2500pF

(2)

One T

to GND ± 7 ± 22 mA

XOUT

TTL-CMOS IN to RS-232 OUT

= 150pF (50% to 50%)

C

L

= 3 kΩ to 7 kΩ, CL = 50 to 1000 pF

L

± 5 ± 9V

(1)

61230V/µs

200 400 kbits/s

= ± 2V 300 Ω

OUT

1.3 3.5 µs

5/17

Electrical characteristics ST202B - ST202C

Table 6. 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

RIN

R

RIN

V

RIL

V

RIH

V

RIHYS

V

ROL

V

ROH

I

SCR

t

DR

1. RS-232 in to TTL-CMOS out (from 50% to 50%)

Receiver input voltage
operating range

RS-232 input resistance TA = 25°C 3 5 7 kΩ

RS-232 input threshold low 0.8 1.3 V

RS-232 input threshold high 1.8 2.4 V

RS-232 input hysteresis VCC = 5V 0.2 0.5 1 V

TTL/CMOS output voltage low I

TTL/CMOS output voltage high I

Receiver output short circuit
current

Propagation delay time CL = 150pF

-30 30 V

= 3.2mA (to VCC)0.20.4V

OUT

= 1mA (to GND) 3.5 VCC-0.2 V

OUT

to GND 2 10

mA

to V

CC

(1)

10 30

0.1 0.5 µs

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