Datasheet > LT1780CSW

LT1780CSW

更新时间： 2024-02-09 10:15:29

品牌	Logo	应用领域
凌特 - Linear		驱动器
页数	文件大小	规格书
12页	279K
描述
Low Power 5V RS232 Dual Driver/Receiver with 【15kV ESD Protection

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中文翻译

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数据手册
替代型号

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LT1780CSW 数据手册

LT1780/LT1781

Low Power 5V RS232

Dual Driver/Receiver with

±15kV ESD Protection

DESCRIPTIO

EATURE

TheLT^®1780/LT1781aredualRS232driver/receiverpairs

with integral charge pump to generate RS232 voltage

levels from a single 5V supply. Using only 0.1µF external

capacitors, these circuits consume only 40mW of power,

and can operate to 120kbaud even while driving heavy

capacitiveloads. NewESDstructuresonthechipallowthe

LT1780/LT1781 to survive ±15kV air gap and ±8kV con-

tact ESD tests per IEC 1000-4-2, eliminating the need for

costly TransZorbs^®on the RS232 line pins. The LT1780/

LT1781 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.

■

10mA Max Supply Current

■

ESD Protection to IEC 1000-4-2 Level 4

±15kV Air Gap,

±8kV Contact

■

Uses Small Capacitors: 0.1

µF

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

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

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

The LT1780/LT1781 are direct upgrades to the LT1180A/

LT1181A,LT1280A/LT1281AandLT1381forapplications

which require the utmost ESD protection.

O U

PPLICATI

■

Portable Computers

Battery-Powered Systems

Power Supply Generator

Terminals

The LT1781 is available in 16-pin DIP,SO and SW pack-

ages. The LT1780 is supplied in 18-pin DIP and SW

packages for applications which require SHUTDOWN.

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

TransZorb is a registered trademark of General Instruments, GSI.

Modems

TYPICAL APPLICATI

Output Waveforms

5V INPUT

0.1µF

OUT

0.1µF

DRIVER

OUTPUT

R_L= 3k

LT1780

–

OUT

_L= 2500pF

RECEIVER

RS232 OUTPUT

OUTPUT

LOGIC

INPUTS

C_L= 50pF

RS232 OUTPUT

RS232 INPUT

INPUT

LOGIC

OUTPUTS

RS232 INPUT

1780/81 • TA02

ON/OFF

1780/81 • TA01

12 3 4 5 6 7...12

中文翻译

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LT1780CSW 替代型号

型号	品牌	替代类型	描述	数据表
LT1781CS	Linear	类似代替	Low Power 5V RS232 Dual Driver/Receiver with

与LT1780CSW相关器件

型号	品牌	获取价格	描述	数据表
LT1780CSW#TR	ADI	获取价格	Line Transceiver, 2 Func, 2 Driver, 2 Rcvr, BIPolar, PDSO18
LT1780CSW#TRPBF	Linear	获取价格	LT1780 - Low Power 5V RS232 Dual Driver/Recei
LT1780IN	ETC	获取价格	Transceiver
LT1780ISW	Linear	获取价格	LT1780 - Low Power 5V RS232 Dual Driver/Recei
LT1780ISW#TRPBF	Linear	获取价格	LT1780 - Low Power 5V RS232 Dual Driver/Recei
LT1780SW	ETC	获取价格	Transceiver
LT1781	Linear	获取价格	Low Power 5V RS232 Dual Driver/Receiver with
LT1781	ADI	获取价格	具 ±15V ESD 保护能力的低功率 5V RS232 双通道驱动器 / 接收器
LT1781_15	Linear	获取价格	Low Power 5V RS232 Dual Driver/Receiver with 15kV ESD Protection
LT1781CN	Linear	获取价格	Low Power 5V RS232 Dual Driver/Receiver with

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