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ISO1540, I2C Bidirectional Isolator, STEMMA AT/Qwiic, Adafruit 4903
3684250 AN-19253
5903351247672
Shipping 9-14 b.d.
All about the product
Bidirectional I2C isolator made by Adafruit. It is used in projects that require electrical isolation of devices on the same bus. Equipped with an ISO1540 chip that meets current safety standards. Supports clock frequencies up to 1 MHz. Powered from 3 V to 5 V (supplied from both sides of the module). The module board also has a STEMMA QT / Qwiic connector for quick and easy connection of the isolator.
Specifications:
- Module type: bidirectional I2C isolator
- Power supply: 3V to 5V
- Maximum clock frequency: up to 1 MHz
- Open drain outputs with current flow:
- Side 1: 3.5 mA
- Side 2: 35 mA
- HBM ESD protection 4 kV on all pins (8 kV on bus pins)
- Safety certificates:
- 4242-VPK insulation according to DIN VDE V 0884-11: 2017-01
- 2500-VRMS insulation for 1 minute per UL 1577
- CSA approval according to IEC 60950-1 and IEC 62368-1 final standard
- CQC basic insulation according to GB4943.1-2011
- Termination:
- soldering fields
- STEMMA QT / Qwiic connectors
- Operating temperature: -40 °C to +125 °C
- Dimensions: 25.4 x 17.8 mm
- Bidirectional I2C Bus Isolator Module
- Goldpin connectors - 2.54 mm








