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LT1080/LT1081

10801fd LT/TP 0400 2K REV D • PRINTED IN USA

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

©LINEAR TECHNOLOGY CORPORATION 1991

TYPICAL APPLICATIO

Supporting an LT1039 (Triple Driver/Receiver)

30k

30k

RS232 OUTPUT

RS232 OUTPUT

RS232 INPUT

RS232 INPUT

1080/81 • TA02

LT1039

TTL INPUT

30k

RS232 INPUT

TTL INPUT

TTL INPUT

TTL OUTPUT

TTL OUTPUT

TTL OUTPUT

ON/OFF

RS232 OUTPUT

5k

RS232 OUTPUT

RS232 INPUT

LT1080

TTL INPUT

5k

RS232 INPUT

TTL INPUT

TTL OUTPUT

TTL OUTPUT

ON/OFF

RS232 OUTPUT

1

µF

2

*C1

4

1

µF

5

6

3

7

18

17

1

µF

1

µF

GND

16

GND

10

1

9

18

17

5V

SHUTDOWN

*IN APPLICATIONS WHERE A SEPARATE SECOND POSITIVE SUPPLY IS AVAILABLE

(SUCH AS 5V AND 12V), THE 12V SUPPLY MAY BE CONNECTED TO PIN 2 AND

C1 DELETED. THE POWER SUPPLY CIRCUITRY WILL THEN INVERT THE 12V SUPPLY.

THE 5V SUPPLY IS STILL NEEDED TO POWER THE BIASING CIRCUITRY AND RECEIVERS.

PART NUMBER

DESCRIPTION

COMMENTS

LT1180A/LT1181A

5V Low Power 2DR/2TX RS232 Transceiver

0.1

µF Capacitors, 10kV ESD

LT1780/LT1781

5V Low Power 2DR/2TX RS232 Transceiver

15kV ESD

LT1381

5V Low Power 2DR/2TX RS232 Transceiver

16-Pin Narrow SO Package

LT1130A/LT1140A

5V RS232 Transceivers

Up to 5DR/5RX

LTC1383

5V Low Power 2DR/2RX RS232 Transceiver

LTC1386

3.3V Low Power EIA/TIA562 Transceiver

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