1 of 10

112099

FEATURES

Compatible with LT1181A and MAX232A

High data rate - 250 kbits/sec under load

16-pin DIP or SOIC package

20-pin TSSOP package for height restricted

applications

Operate from single +5V power

Meets all EIA-232E and V0.28 specifications

Uses small capacitors: 0.1

µF

Optional industrial temperature range

available (-40

°C to +85°C)

ORDERING INFORMATION

DS232A

16-pin DIP

DS232A-N

16-pin DIP (Industrial)

DS232AR

16-pin SOIC (150-Mil)

DS232AR-N 16-pin SOIC (150-Mil) (Industrial)

DS232AS

16-pin SOIC (300-Mil)

DS232AS-N 16-pin SOIC (300-Mil) (Industrial)

DS232AE

20-pin TSSOP

DS232AE-N 20-pin TSSOP (Industrial)

PIN ASSIGNMENT

PIN DESCRIPTION

- +5-Volt Supply

GND

- Ground

V+

- Positive Supply Output

V-

- Negative Supply Output

- RS-232 Driver Inputs

- RS-232 Driver Outputs

- Receiver Inputs

- Receiver Outputs

C1+, C1-

- Capacitor 1 Connections

C2+, C2-

- Capacitor 2 Connections

DESCRIPTION

The DS232A is a dual RS-232 driver/receiver pair that generates RS-232 voltage levels from a single +5-

volt power supply. Additional

±12-volt supplies are not needed since the DS232A uses on-board charge

pumps to convert the +5-volt supply to

±10 volts. The DS232A is fully compliant with EIA RS-232E and

V0.28/V0.24 standards. The DS232A contains two drivers and two receivers. Driver slew rates and data

rates are guaranteed up to 250k bits/sec. The DS232A operates with only 0.1

µF charge pump capacitors.

OPERATION

The diagram in Figure 1 shows the main elements of the DS232A. The following paragraphs describe the

function of each pin.

DS232A

Dual RS-232 Transmitter/Receiver

www.dalsemi.com

16-Pin DIP AND SOIC

15

C1-

C2-

1

2

3

4

5

6

7

8

16

14

13

12

11

10

9

V+

C2+

V-

C1+

GND

20-Pin TSSOP

19

C1-

NC

V-

NC

NC

NC

1

2

3

4

5

6

7

8

9

10

20

18

17

16

15

14

13

12

11

V+

C2+

C2-

C1+

GND