DESCRIPTION

The LTC®2873 is a robust pin-configurable multiprotocol transceiver that supports RS232, RS485, and RS422 protocols while operating on a single 3V to 5.5V supply. The LTC2873 can be configured as a half-duplex RS485 transceiver or as an RS232 transceiver using the same two bus pins.

FEATURES

■ One RS485 or One RS232 Transceiver

■ 3V to 5.5V Supply Voltage

■ Up to 20Mbps RS485

■ Slew-Controlled RS232 Operation:

■ Selectable 1Mbps or 250kbps

■ Automatic Selection of Integrated RS485 (120Ω)

and RS232 (5kΩ) Termination Resistors

■ High ESD: ±26kV HBM

■ Logic Loopback Mode

■ 1.7V to 5.5V Logic Interface

■ Supports Up to 256 RS485 Nodes

■ RS485 Receiver Failsafe Eliminates UART Lockup

■ H-Grade Available (–40°C to 125°C)

■ Available in 24-Pin 4mm × 5mm QFN Package

APPLICATIONS

■ Software Selectable RS232/RS485/RS422 Interface

■ Industrial Sensors and Actuators

■ Alarm Systems

■ Traffic Control and Monitoring

■ Highway Signs and Jumbo Displays