{"schemaVersion":1,"slug":"isolated-i2c-interface","name":"Isolated I2C interface","kind":"symbol","abbreviation":"ISO I2C","aliases":["Isolated I2C interface","Isolated I2C interface functional block","Isolated I2C interface schematic reference"],"category":"installation-communications","drawingTypes":["Schematic"],"referenceFamilies":["Manufacturer"],"summary":"An isolated I2C interface transfers the required bus behaviour across an electrical isolation barrier.","description":["An isolated I2C interface transfers the required bus behaviour across an electrical isolation barrier.","Two circuit domains can communicate using a suitable isolator designed for their I2C arrangement.","Show clock and data transfer across the barrier while identifying each side’s pull-ups and power. I2C includes bidirectional bus behaviour, so a generic isolator cannot be substituted without checking that behaviour. Use the selected I2C isolator’s supported arrangement and timing requirements. This is original functional artwork, not a certified standard graphic or device pinout."],"readingNotes":["Identify clock and data on both isolated domains.","Show each side’s supply and pull-up arrangement.","Reference bidirectional behaviour and supported bus timing.","An ordinary digital isolator is not automatically suitable for every bidirectional I2C signal path."],"drawingChecklist":["Identify clock and data on both isolated domains.","Show each side’s supply and pull-up arrangement.","Reference bidirectional behaviour and supported bus timing."],"distinction":"An ordinary digital isolator is not automatically suitable for every bidirectional I2C signal path.","facts":[{"label":"Representation type","value":"Original functional block; not a certified IEC or IEEE graphic"},{"label":"Concept input","value":"First-domain I2C bus"},{"label":"Concept output","value":"Second-domain I2C bus"}],"references":[{"sourceId":"expansion-20261027-isolatedbus","relevance":"Isolated communication interfaces: public technical context for the named function. Product and compliance details remain with the publisher."}],"related":["capacitive-digital-isolator","isolated-can-transceiver","isolated-rs-485-transceiver","power-converter"],"artwork":"expanded-isolated-i2c-interface","publishedOn":"2026-10-27","updatedOn":"2026-10-27","provenance":"independent-public-research","plainEnglish":{"title":"What does Isolated I2C interface mean?","introduction":"An isolated I2C interface transfers the required bus behaviour across an electrical isolation barrier.","example":"Two circuit domains can communicate using a suitable isolator designed for their I2C arrangement.","drawings":"Show clock and data transfer across the barrier while identifying each side’s pull-ups and power. I2C includes bidirectional bus behaviour, so a generic isolator cannot be substituted without checking that behaviour. Use the selected I2C isolator’s supported arrangement and timing requirements.","terms":[{"name":"Bidirectional","meaning":"A path that supports the specified information flow in both directions."},{"name":"Clock stretching","meaning":"A bus behaviour that some selected I2C arrangements must accommodate."}],"diagram":"flow","caption":"Original functional explanation. Arrows show information or energy roles; two-headed arrows identify two-way interfaces. This is not a pinout, certified standards graphic or complete circuit.","sources":[{"label":"Isolated communication interfaces","url":"https://www.ti.com/product-category/isolation/isolated-interface-ics/overview.html"}],"profileId":"researched-functional-reference","checklist":["Identify clock and data on both isolated domains.","Show each side’s supply and pull-up arrangement.","Reference bidirectional behaviour and supported bus timing."],"questions":[{"question":"Can any digital isolator isolate I2C?","answer":"No. The interface must accommodate the relevant I2C signal behaviour, including the selected bidirectional paths. Use a device or circuit explicitly designed for the required arrangement."}],"steps":["First-domain I2C bus","I2C-compatible isolation","Second-domain I2C bus"],"bidirectional":true},"url":"https://eloragrid.ai/symbols/isolated-i2c-interface","illustration":{"url":"https://eloragrid.ai/tools/electrical-library/illustrations/isolated-i2c-interface.svg","scope":"Original educational concept; not an official standard graphic or product footprint","license":"https://creativecommons.org/licenses/by/4.0/"},"sources":[{"id":"expansion-20261027-isolatedbus","title":"Isolated communication interfaces","publisher":"Texas Instruments","url":"https://www.ti.com/product-category/isolation/isolated-interface-ics/overview.html","type":"manufacturer","scope":"Public functional documentation. Original explanatory text and educational block artwork; no publisher graphics or files reproduced.","checkedOn":"2026-10-27","reuse":"link-only","relevance":"Isolated communication interfaces: public technical context for the named function. Product and compliance details remain with the publisher."}]}