Description
The LTC®1481 is an ultralow power differential line transceiver designed for data transmission standard RS485 applications. It will also meet the requirements of RS422.
The CMOS design offers significant power savings over its bipolar counterparts without sacrificing ruggedness against overload or ESD damage. Typical quiescent current is only
80mA while operating and less than 1mA 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 LTC1481 is fully specified over the commercial and extended industrial temperature range and is available in 8-pin PDIP and SO packages.

Features
*Low Power: ICC = 120mA Max with Driver Disabled
*Drivers/Receivers Have ±10kV ESD Protection
*1mA Quiescent Current in Shutdown Mode
*High Speed: Up to 2.5Mbits/s Data Rate
*ICC = 500mA 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
*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

Applications
*Battery-Powered RS485/RS422 Applications
*Low Power RS485/RS422 Transceiver
*Level Translator

LTC1481CN8, LTC1481IN8, LTC1481CS8, LTC1481IS8

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