High-ESD PROFIBUS RS-485 Transceiver

Analog Devices' MAX14770E is a half-duplex, ±35 kV high-ESD-protected transceiver for PROFIBUS-DP and RS-485 applications. In addition, it can be used for RS-422/V.11 communications. The MAX14770E is designed to meet IEC 61158-2, TIA/EIA-422-B, TIA/EIA-485-A, V.11, and X.27 standards. The MAX14770E operates from a 5 V supply and has true fail-safe circuitry that guarantees a logic-high-receiver output when the receiver inputs are open or shorted. The MAX14770E features a 1/4 standard-unit load receiver input impedance, allowing up to 128 1/4 unit load transceivers on the bus. Drivers are short-circuit current limited, and are protected against excessive power dissipation by thermal-shutdown circuitry. The MAX14770E is available in an 8-pin SO and an 8-pin µMAX® specified over the extended temperature range. It is also available in a tiny TDFN (3 mm x 3 mm) package, and specified over the automotive (-40°C to 125°C) temperature range.