LT1180A Linear Technology, LT1180A Datasheet

LT1180A

Manufacturer Part Number

LT1180A

Description

Low Power 5V RS232 Dual Driver/Receiver with 0.1uF Capacitors

Manufacturer

Linear Technology

Datasheet

1.LT1180A.pdf (12 pages)

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FEATURE

TYPICAL

OUTPUTS

PPLICATI

ESD Protection over 10kV

Uses Small Capacitors: 0.1 F

120kBaud Operation for R

250kBaud Operation for R

Outputs Withstand 30V Without Damage

CMOS Comparable Low Power: 40mW

Operates from a Single 5V Supply

Rugged Bipolar Design

Outputs Assume a High Impedance State When Off

or Powered Down

Meets All RS232 Specifications

Available With or Without Shutdown

Absolutely No Latch-up

Available in SO Package

Portable Computers

Battery-Powered Systems

Power Supply Generator

Terminals

Modems

INPUTS

LOGIC

ON/OFF

0.1 F

PPLICATI

LT1180A

= 3k, C

0.1 F

= 2500pF

= 1000pF

5V INPUT

RS232 OUTPUT

RS232 INPUT

–

OUT

LT1180A • TA01

The LT

pairs with integral charge pump to generate RS232 volt-

age levels from a single 5V supply. These circuits feature

rugged bipolar design to provide operating fault tolerance

and ESD protection unmatched by competing CMOS

designs. Using only 0.1 F external capacitors, these cir-

cuits consume only 40mW of power, and can operate to

120k baud even while driving heavy capacitive loads. New

ESD structures on the chip allow the LT1180A/LT1181A to

survive multiple 10kV strikes, eliminating the need for

costly TransZorbs

LT1181A are fully compliant with EIA RS232 standards.

Driver outputs are protected from overload, and can be

shorted to ground or up to 30V without damage. During

shutdown or power-off conditions, driver and receiver

outputs are in a high impedance state, allowing line

sharing.

The LT1181A is available in 16-pin DIP and SO packages.

The LT1180A is supplied in 18-pin DIP and SO packages

for applications which require shutdown.

TransZorb is a registered trademark of General Instruments, GSI

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

ESCRIPTIO

RECEIVER

= 2500pF

OUTPUT

DRIVER

= 50pF

INPUT

= 3k

1180A/LT1181A are dual RS232 driver/receiver

Dual Driver/Receiver with

Low Power 5V RS232

on the RS232 line pins. The LT1180A/

Output Waveforms

LT1180A/LT1181A

0.1 F Capacitors

LT1180A • TA02

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