DESCRIPTION
The LTC®1318 is a single 5V, RS232/RS422 transceiver for connectiontothe DCE, or peripheralside ofaninterface link. It includes an on-board charge pump to generate a –8V supply which allows true RS232 output swings. The charge pump requires only four external 0.1mF capacitors. The LTC1318 includes two RS232 drivers, a differential RS422 driver, a dedicated RS232 receiver, and a pin selectable RS232/RS422 receiver which can receive either single-ended or differential signals.

FEATURES
■ Single Chip Provides DCE RS232 or
   RS422/AppleTalk DCE Port
■ Operates from a Single 5V Supply
■ Charge Pump Uses 0.1mF Capacitors
■ Output Common-Mode Voltage Range Exceeds
   Power Supply Rails for All Drivers
■ Driver Outputs Are High Impedance with Power Off
■ Pin Selectable RS232/RS422 Receiver
■ Thermal Shutdown Protection
■ Drivers Are Short-Circuit Protected

APPLICATIONS
■ Dual-Mode RS232/RS422 Peripherals
■ AppleTalk Peripherals
■ Single 5V Systems