RS-485 Transceivers Raise Voltage And Isolation Levels

Intersil’s two latest isolated RS-485 differential bus transceivers provide 40-Mb/s bidirectional data communication for Industrial Internet of Things (IIoT) networks. The ISL32741E offers a 1-kVRMS working voltage and 6 kV of reinforced isolation, more than 2x higher than comparable devices. The ISL32740E with 2.5 kV of isolation and a 600-VRMS working voltage comes in the industry’s smallest package, enabling high channel density for programmable logic controllers (PLCs) in factory automation applications.


Both transceivers support for up to 160 devices on the bus and specify an extended +125°C temperature range. In addition, Intersil’s GMR isolation does not require the elaborate encoding schemes found in capacitive and transformer-based isolators that use RF carriers or pulse-width modulation (PWM) to transfer dc and low frequency signals across the barrier.

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The ISL32740E and ISL32741E 40Mbps RS-485 transceivers are available now with prices ranging from $3.79 to $4.79 each depending on package type and temperature range. Evaluation boards are available for $99. More information, specs, and datasheets are available.


Intersil Corp.

Milpitas, CA



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