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112099

FEATURES

Compatible with DS1229

5V operation

20-pin DIP or SOIC package

20-pin TSSOP package for height restricted

applications

Operate from single +5V power

Meets all EIA-232E and V.28 specifications

Uses small capacitors: 0.1

µF

Optional industrial temperature range

available (-40

°C to +85°C)

ORDERING INFORMATION

DS229

20-pin DIP

DS229N

20-pin DIP (Industrial)

DS229S

20-pin SOIC

DS229SN

20-pin SOIC (Industrial)

DS229E

20-pin TSSOP

DS229EN

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

- Receiver Inputs

C1+, C1-

- Capacitor 1 Connections

C2+, C2-

- Capacitor 2 Connections

DESCRIPTION

The DS229 is a triple 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 DS229 uses on-board charge

pumps to convert the +5-volt supply to

±10 volts. The DS229 is fully compliant with EIA RS-232E and

V.28/V.24 standards. The DS229 contains three drivers and three receivers. Driver slew rates and data

rates are guaranteed up to 116 kbits/sec. The DS229 operates with only 0.1

µF charge pump capacitors.

OPERATION

The diagram in Figure 1 shows the main elements of the DS229. The following paragraphs describe the

function of each pin.

DS229

Triple RS-232 Transmitter/Receiver

www.dalsemi.com

20-Pin DIP, SOIC AND TSSOP

19

C1-

C2-

1

2

3

4

5

6

7

8

9

10

20

18

17

16

15

14

13

12

11

V+

C2+

V-

C1+

GND