General Description

The MAX14770E is a half-duplex, Q35kV 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 +5V 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 FMAX® specified over the extended (-40°C to +105°C) temperature range. It is also available in a tiny TDFN (3mm x 3mm) package and specified over the automotive (-40°C to +125°C) temperature range.

Features

♦ Meets EIA 61158-2 Type 3 PROFIBUS-DP

♦ +4.5V to +5.5V Supply Voltage

♦ 20Mbps Data Rate

♦ Short-Circuit Protected

♦ True Fail-Safe Receiver

♦ Thermal-Shutdown Protected

♦ Hot Swappable

♦ High ESD Protection

   ±35kV Human Body Model (HBM)

   ±20kV IEC 61000-4-2 Air Gap

   ±10kV IEC 61000-4-2 Contact

♦ -40°C to +125°C Automotive Temperature Range

   in Tiny 8-Pin (3mm x 3mm) TDFN

Applications

   PROFIBUS-DP Networks

   Industrial Fieldbuses

   Motion Controllers

   RS-485 Networks

   Machine Encoders