Datasheet > LTC1481

LTC1481

更新时间： 2023-12-20 18:44:05

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
8页	159K
描述
具停机功能的超低功率 RS485 收发器

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LTC1481 数据手册

LTC1481

Ultralow Power

RS485 Transceiver

with Shutdown

FEATURES

DESCRIPTIO

The LTC^®1481 is an ultralow power differential line trans-

ceiver designed for data transmission standard RS485

applications. It will also meet the requirements of RS422.

TheCMOSdesignofferssignificantpowersavingsoverits

bipolarcounterpartswithoutsacrificingruggednessagainst

overloadorESDdamage. Typicalquiescentcurrentisonly

80µA while operating and less than 1µA in shutdown.

■

Low Power: I_CC= 120µA Max with Driver Disabled

■

Drivers/Receivers Have ±10kV ESD Protection

■

1µA Quiescent Current in Shutdown Mode

■

High Speed: Up to 2.5Mbits/s Data Rate

■

I_CC= 500µA Max with Driver Enabled, No Load

■

Single 5V Supply

■

–7V to 12V Common Mode Range Permits ±7V

Ground Difference Between Devices on the Data Line

The driver and receiver feature three-state outputs, with

the driver outputs maintaining high impedance over the

entire common mode range. Excessive power dissipation

caused by bus contention or faults is prevented by a

thermal shutdown circuit which forces the driver outputs

into a high impedance state. The receiver has a fail-safe

feature which guarantees a high output state when the

inputs are left open.

■

Thermal Shutdown Protection

■

Power Up/Down Glitch-Free Driver Outputs Permit

Live Insertion or Removal of Transceiver

■

Driver Maintains High Impedance in Three-State

or with the Power Off

Up to 32 Transceivers on the Bus

30ns Typical Driver Propagation Delays

with 5ns Skew

Pin Compatible with the LTC485

■

The LTC1481 is fully specified over the commercial and

extended industrial temperature range and is available in

8-pin PDIP and SO packages.

APPLICATIO S

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

■

Battery-Powered RS485/RS422 Applications

■

Low Power RS485/RS422 Transceiver

■

Level Translator

TYPICAL APPLICATIO

Supply Current vs Temperature

350

RO1

RE1

DE1

DI1

THERMAL SHUTDOWN

300

CC1

WITH DRIVER ENABLED

250

DRIVER ENABLED

200

GND1

150

RO2

RE2

DE2

DI2

CC2

100

DRIVER DISABLED

GND2

LTC1481 • TA01

–50 –25

75 100 125 150 175

TEMPERATURE (°C)

1481 TA02

1481fa

12 3 4 5 6 7 8

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