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LT1780

Low Power 5V RS232 Dual Driver/Receiver with ±15kV ESD Protection

Linear Technology 

LT1780/LT1781

TYPICAL APPLICATIO

Supporting an LT1039 (Triple Driver/Receiver)

SHUTDOWN

5V

18

ON/OFF

VCC

LT1780

11

TTL INPUT

17

8

RS232 OUTPUT

18

VCC

ON/OFF 17

LT1039

15

TTL INPUT

4

RS232 OUTPUT

12

TTL INPUT

15 RS232 OUTPUT

13

TTL INPUT

6

RS232 OUTPUT

13

TTL OUTPUT

10

TTL OUTPUT

14

RS232 INPUT

5k

9

RS232 INPUT

5k

2 C1+

1µF

4 C1–

5 C2+

V+ 3

1µF

6 C2–

V– 7

GND

1µF

16

11

TTL INPUT

16

TTL OUTPUT

14

TTL OUTPUT

12

TTL OUTPUT

1 V+

9 V–

1µF

8

RS232 OUTPUT

3

RS232 INPUT

30k

5

RS232 INPUT

30k

7

RS232 INPUT

30k

GND

10

1780/81 • TA04

RELATED PARTS

PART NUMBER

LT1137A

LTC1383

LTC1387

DESCRIPTION

3Driver/5Receiver RS232 Transceiver

5V Low Power RS232 2Driver/2Receiver Transceiver

Single 5V RS232/RS485 Multiprotocol Transceiver

COMMENTS

IEC-1000-4-2 Level 4 ESD Compliance

Low Supply Current ICC = 220µA

Configurable as Dual RS232 or Single RS485 Transceiver

12

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408)432-1900 q FAX:(408)434-0507 q www.linear-tech.com

17801f LT/TP 0498 4K • PRINTED IN USA

© LINEAR TECHNOLOGY CORPORATION 1998

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