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ISO3086T: Protection functions for a conflict with the transmit port

Part Number: ISO3086T

Hello team,

I received an inquiry from my customer, about RS-485 Transceivers ISO3086T.

Could you confirm the below questions about conflict protections of this IC?

Questions

  • Is there a protection circuit in place to prevent permanent device damage in the event of a conflict between two or more RS-485 transmit ports?

  • Could you also confirm whether or not it have performed tests in accordance with the Application Guidelines for TIA/EIA-485-A?

Please contact if there are other information needed.

Best Regards,

Ryotaro Fukui

  • Hi Fukui-san:

    Thanks for posting your customer question on E2E!

    Below are my responses to your questions.

    Is there a protection circuit in place to prevent permanent device damage in the event of a conflict between two or more RS-485 transmit ports?

    ISO3086T devices are not expected to sustain permanent damage when two or more RS-485 transmitters transmit at the same time. This is achieved by limiting the driver output current to be less than 250mA even with direct voltage shorts of up to -7V to +12V. (Short-circuit output current spec of the device.)

    Could you also confirm whether or not it have performed tests in accordance with the Application Guidelines for TIA/EIA-485-A?

    Yes, ISO3086T meets or exceeds all TIA/EIA-485-A requirements.

    Regards,

    Dushmantha