DIG-ISO
Capacitive digital isolator
Transfers digital information between separately referenced electrical domains through a capacitive isolation structure.
Schematic
Symbols · ISO I2C
Isolated I2C interface
In plain English
What does Isolated I2C interface mean?
An isolated I2C interface transfers the required bus behaviour across an electrical isolation barrier.
A simple example
Two circuit domains can communicate using a suitable isolator designed for their I2C arrangement.
What the drawings help you do
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.
- Bidirectional
- A path that supports the specified information flow in both directions.
- Clock stretching
- A bus behaviour that some selected I2C arrangements must accommodate.
Before using this reference
- Identify clock and data on both isolated domains.
- Show each side’s supply and pull-up arrangement.
- Reference bidirectional behaviour and supported bus timing.
Can any digital isolator isolate I2C?
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.
Read the source: Isolated communication interfaces
Schematic · ISO I2C
A distinction that matters
An ordinary digital isolator is not automatically suitable for every bidirectional I2C signal path.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Isolated communication interfaces
Isolated communication interfaces: public technical context for the named function. Product and compliance details remain with the publisher.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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