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LTC1483

sn1483 1483fs

Ultra-Low Power RS485 Low EMI

Transceiver with Shutdown

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FEATURE

DESCRIPTIO

The LTC

ceiver designed for data transmission standard RS485

applications with extended common-mode range (– 7V to

12V). It will also meet the requirements of RS422. The

LTC1483 features output drivers with controlled slew rate,

decreasing the EMI radiated from the RS485 lines, and

improving signal fidelity with misterminated lines. The

CMOS design offers significant power savings over its

bipolar counterparts without sacrificing ruggedness against

overload or ESD damage. Typical quiescent current is only

80

µA while operating and less than 1µA in shutdown.

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. I/O pins are protected against multiple

ESD strikes of over

±10kV.

The LTC1483 is fully specified over the commercial and

extended industrial temperature range and is available in

8-pin DIP and SO packages.

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1

µA Quiescent Current in Shutdown Mode

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Controlled Slew Rate Driver for Reduced EMI

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Single 5V Supply

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Drivers/Receivers Have

±10kV ESD Protection

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– 7V to 12V Common-Mode Range Permits

±7V

Ground Difference Between Devices on the Data Line

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Thermal Shutdown Protection

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Power Up/Down Glitch-Free Driver Outputs Permit

Live Insertion or Removal of Transceiver

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Driver Maintains High Impedance in Three-State

or with the Power Off

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Up to 32 Transceivers on the Bus

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Pin Compatible with the LTC485

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Battery-Powered RS485/RS422 Applications

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Low Power RS485/RS422 Transceiver

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Level Translator

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APPLICATI

APPLICATI

TYPICAL

GND1

R

RO1

RE1

DE1

DI1

D

GND2

R

RO2

RE2

DE2

DI2

D

LTC1483 • TA01

RO

A – B

DI

1483 TA02

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