Telecoms, Datacoms, Wireless, IoT


Serial transceiver runs in several modes

14 April 2010 Telecoms, Datacoms, Wireless, IoT

Exar’s new SP336 is a single-chip RS232/RS485/RS422 serial transceiver targeted at factory automation, process controls, embedded PCs, security networks and point-of-sales equipment, amongst other applications. In addition to supporting industry interface standards, the device has 1/8th unit load capability (up to 256 transceivers on the serial communication bus).

The SP336 may be reconfigured into eight operating modes including RS232-only (4Tx/4Rx), RS485/RS422-only (2Tx/2Rx) full- or half-duplex, two RS232/RS485/RS422 mixed-modes, two shutdown modes and a diagnostic loop-back mode. All bus pins are protected against severe ESD events up to ±15 kV (IEC 61000-4-2 air-gap) and ±8 kV (IEC 61000-4-2 contact). The selectable slew-rate controlled outputs minimise problems with reflections and ringing on long or unterminated cables. When configured in RS485/RS422 mode, each driver may be individually enabled or tri-stated, simplifying use on shared buses or bidirectional communication.

The products are available in commercial (0 to +70°C) and industrial (-40 to +85°C) operating temperature ranges.



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