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