LT1039AISW Linear Technology, LT1039AISW Datasheet

LT1039AISW

Manufacturer Part Number

LT1039AISW

Description

Triple RS232 Driver/Receiver with Shutdown

Manufacturer

Linear Technology

Datasheets

1.LT1039AISW.pdf (12 pages)

2.LT1039AISW.pdf (12 pages)

3.LT1039AISW.pdf (12 pages)

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APPLICATIO S

FEATURES

**50 RESISTORS

TYPICAL APPLICATIO

*BIAS PIN USED

MAY BE REQUIRED

FOR IEC-1000-4-2

ESD PROTECTION

DEPENDING UPON

PC BOARD AND

CONNECTOR LEAD LENGTH

TO KEEP THE

RECEIVER ON

WHILE IN SHUTDOWN

RS232 Interface

Terminals

Modems

On-Chip ESD Protection:

125kBd Operation with 3k /2500pF Load

250kBd Operation with 3k /1000pF Load

Outputs Can Be Driven 30V Without Damage

No Supply Current in Shutdown

Operates from 5V to 15V Supplies

Fully Protected Against Overload

Three-State Outputs; Outputs Open When Off

Bipolar Circuit—No Latchup

Triple Driver/Receiver

30k Input Impedance

Meets All RS232 Specifications

16-Pin Version—Pin Compatible with MC145406

Available in SO Package

30V Input Range

15kV Human Body Model

15kV IEC-1000-4-2 Air Gap Test**

8kV IEC-1000-4-2 Contact Test

RS232 OUT

RS232 IN

50 **

BIAS*

– 12V

12V

–

LT1039A

30k

1039A TA01

GND

ON/OFF

LOGIC

DESCRIPTIO

The LT

includes shutdown. Each receiver will accept up to 30V

input and can drive either TTL or CMOS logic. The RS232

drivers accept TTL logic inputs and output RS232 voltage

levels. The outputs are fully protected against overload

and can be shorted to ground or up to 30V without

damage to the drivers. Additionally, when the system is

shut down or power is off, the outputs are in a high

impedance state allowing data line sharing. On-chip ESD

protection eliminates the need for external protection

devices.

A bias pin allows one receiver to be kept on while the rest

of the part is shut down.

The LT1039A is also available in the 16-pin version,

without shutdown or bias pin functions.

For applications requiring operation from a single 5V

supply, see the LT1180A/LT1181A and LT1130A data

sheets.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Triple RS232 Driver/Receiver

1039A is a triple RS232 driver/receiver that

– 0.4

– 0.8

–1.2

–1.6

– 2.0

1.2

0.8

0.4

–

0.5

LT1039A/LT1039A-16

1.0

Driver Output Swing

OUTPUT CURRENT (mA)

1.5

2.0

2.5

with Shutdown

3.0

3.5

4.0

1039A TA02

4.5

5.0

1039afa

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