数字隔离器LTC1480IS8#PBF

LTC1480IS8#PBF/LTC1480IS8#PBF/LTC1480IS8#PBF

FEATURES

TYPICAL APPLICATIO U

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

All other trademarks are the property of their respective owners.

■ True RS485 from a Single 3.3V Supply

■ Low Power: ICC = 500μA Max with Driver Disabled

■ ICC = 600μA Max with Driver Enabled, No Load

■ 1μA Quiescent in Shutdown Mode

■ –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

■ Up to 32 Transceivers on the Bus

■ 50ns Typical Driver Propagation Delays with

10ns Skew

■ Pin Compatible with the LTC485

■ Available in 8-Lead DIP and SO Packages

3.3V Ultralow Power

RS485 Transceiver

The LTC1480IS8#PBF

is an ultralow power differential line transceiver

which provides full RS485 compatibility while operating

from a single 3.3V supply. It is designed for data

transmission standard RS485 applications with extended

common mode range (12V to –7V). It also meets the

requirements of RS422 and features high speed operation

up to 2.5Mb/s. The CMOS design offers significant power

savings without sacrificing ruggedness against overload

or ESD damage. Typical quiescent current is only 300μA

while operating and 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.

The LTC1480IS8#PBF is fully specified over the commercial and

extended industrial temperature range. The LTC1480IS8#PBF is

available in 8-pin SO and DIP packages