SP339E - Exar

SP339E RS-232/RS-485/RS-422 TRANSCEIVER

The SP339 is an advanced multiprotocol transceiver supporting RS-232, RS-485, and RS-422 serial standards in a 40 pin QFN package. Integrated cable termination and four configuration modes allow all three protocols to be used interchangeably over a single cable or connector with no additional switching components. Full operation requires only four external c.

Features

 Pin selectable Cable Termination
 No external resistors required for RS-485/422 termination and biasing
 3.3V or 5V Single Supply Operation
 Robust ESD Protection on bus pins
■ ±15kV IEC 61000-4-2 (Air Gap)
■ ± 8kV IEC 61000-4-2 (Contact)
■ ±15kV Human Body Model (HBM)
 Max Data Rate of 20Mbps in RS-485/422 Modes and up to 1Mbps in RS-232 Modes
 Pin selectable 250kbps Slew Limiting
 3 Drivers, 5 Receivers RS-232/V.28
 1 Driver, 1 Receiver RS-485/422
■ Full and Half Duplex Configuration
■ 1/8th Unit Load, up to 256 receivers on bus
 RS-485/422 Enhanced Failsafe for open, shorted, or .