Datasheet > LT1381

LT1381

更新时间： 2023-12-20 18:46:24

品牌	Logo	应用领域
亚德诺 - ADI		驱动电容器驱动器
页数	文件大小	规格书
8页	164K
描述
具 0.1μF 电容器的低功率 5V RS232 双通道驱动器 / 接收器

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LT1381 数据手册

LT1381

Low Power 5V RS232 Dual

Driver/Receiver with

0.1µF Capacitors

DESCRIPTIO

EATURE

The LT^®1381 is a dual RS232 driver/receiver pair with

integral charge pump to generate RS232 voltage levels

from a single 5V supply. The circuit features rugged

bipolar design to provide operating fault tolerance and

ESD protection unmatched by competing CMOS designs.

Using only 0.1µF external capacitors, the circuit con-

sumes only 40mW of power and can operate to 120kbaud

even while driving heavy capacitive loads. New ESD struc-

tures on the chip allow the LT1381 to survive multiple

±10kVstrikes,eliminatingtheneedforcostlyTransZorbs^®

on the RS232 line pins. Driver outputs are protected from

overload and can be shorted to ground or up to ±25V

without damage. During power-off conditions, driver and

receiver outputs are in a high impedance state, allowing

line sharing.

■

ESD Protection over ±10kV

Low Cost

Uses Small Capacitors: 0.1µF

CMOS Comparable Low Power: 40mW

Operates from a Single 5V Supply

120kBaud Operation for R_L= 3k, C_L= 2500pF

250kBaud Operation for R_L= 3k, C_L= 1000pF

Rugged Bipolar Design

Outputs Assume a High Impedance State When

Powered Down

Absolutely No Latchup

Available in Narrow SO Package

■

O U

PPLICATI

■

Portable Computers

Battery-Powered Systems

Power Supply Generator

Terminals

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

TransZorb^®is a registered trademark of General Instruments, GSI

Modems

TYPICAL APPLICATI

5V INPUT

Output Waveforms

0.1µF

OUT

DRIVER

OUTPUT

R_L= 3k

0.1µF

LT1381

–

_L= 2500pF

OUT

0.1µF

RECEIVER

RS232 OUTPUT

OUTPUT

LOGIC

INPUTS

C_L= 50pF

RS232 OUTPUT

RS232 INPUT

INPUT

LOGIC

OUTPUTS

RS232 INPUT

LT1381 • TA02

LT1381 • TA01

12 3 4 5 6 7 8

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