Datasheet > LTC1481

LTC1481

更新时间： 2024-11-12 22:57:35

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
8页	221K
描述
Ultra-Low Power RS485 Transceiver with Shutdown

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中文翻译

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LTC1481 数据手册

LTC1481

Ultra-Low Power

RS485 Transceiver

with Shutdown

DESCRIPTIO

EATURE

The LTC^®1481 is an ultra-low 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

I_CC= 500µA Max with Driver Enabled, No Load

Drivers/Receivers Have ±10kV ESD Protection

1µA Quiescent Current in Shutdown Mode

High Speed: Up to 2.5Mbits/s Data Rate

Single 5V Supply

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

Ground Difference Between Devices on the Data Line

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

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.

■

Up to 32 Transceivers on the Bus

30ns Typical Driver Propagation Delays

with 5ns Skew

The LTC1481 is fully specified over the commercial and

extended industrial temperature range and is available in

8-pin DIP and SO packages.

■

Pin Compatible with the LTC485

O U

PPLICATI

■

Battery-Powered RS485/RS422 Applications

Low Power RS485/RS422 Transceiver

Level Translator

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

TYPICAL APPLICATI

Supply Current vs Temperature

350

RO1

RE1

DE1

DI1

CC1

THERMAL SHUTDOWN

300

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

12 3 4 5 6 7 8

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