LTC1480CS8

Product Summary

The LTC1480CS8 is a RS485 Transceiver. The LTC1480CS8 is an ultra-low 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 300mA while operating and 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. I/O pins are protected against multiple ESD strikes of up to ±10kV. The LTC1480CS8 is fully specified over the commercial and extended industrial temperature range. The LTC1480CS8 is available in 8-pin SO and DIP packages. The applications of the LTC1480CS8 include Battery-Powered RS485/RS422 Applications, Low Power RS485/RS422 Transceiver and Level Translator.

Parametrics

LTC1480CS8 absolute maximum ratings: (1)Supply Voltage (VCC): 7V; (2)Control Input Voltage: – 0.3V to VCC + 0.3V; (3)Driver Input Voltage: – 0.3V to VCC + 0.3V; (4)Driver Output Voltage: ±14V; (5)Receiver Input Voltage: ±14V; (6)Receiver Output Voltage: – 0.3V to VCC + 0.3V; (7)Operating Temperature Range: 0℃ ≦ TA ≦ 70℃; (8)Storage Temperature Range: –65℃ to 150℃; (9)Lead Temperature (Soldering, 10 sec): 300℃.

Features

LTC1480CS8 features: (1)True RS485 from a Single 3.3V Supply; (2)Low Power: ICC = 500μA Max with Driver Disabled; (3)ICC = 600μA Max with Driver Enabled, No Load; (4)1μA Quiescent in Shutdown Mode; (5)ESD Protection to ±10kV on Receiver Inputs and Driver Outputs; (6)–7V to 12V Common-Mode Range Permits ±7V Ground Difference Between Devices on the Data Line; (7)Thermal Shutdown Protection; (8)Power Up/Down Glitch-Free Driver Outputs Permit Live Insertion or Removal of Transceiver; (9)Driver Maintains High Impedance in Three-State or with the Power Off; (10)Up to 32 Transceivers on the Bus; (11)50ns Typical Driver Propagation Delays with 10ns Skew; (12)Pin Compatible with the LTC485.

Diagrams