Product description: ISO1540 - I2C Isolator - STEMMA AT/Qwiic - Adafruit 4903
BidirectionalI2C isol ator manufactured by Adafruit. It is used in projects that require electrical separation of devices on the same bus. Equipped with ISO1540 chip, compliant with current safety standards. Fully bidirectional, supports clock frequency up to 1 MHz. Powered from 3V to 5V (supplied on both sides of the module). On the board of the module there is also STEMMA QT / Qwiic connector, with which you can quickly and easily connect the isolator.
Product is compatible with Arduino and Raspberry Pi.
A detailed user guide is available on the manufacturer's website, which makes it significantly easier to get started with the module.
Pinout description of the isolator module.
Pinout description
The module is equipped with leads in the form of solder fields. You should attach to them goldpin connectors included in set. The board has also STEMMA QT / Qwiic connectors which can be used to conveniently connect the module with controller module - without additional soldering.
- VCC - power pin from 3 V to 5 V
- GND - system ground
- SCL - logic pin, I2C interface clock line
- SDA - logic pin, data line of I2C interface
- STEMMA QT / Qwiic - connection connector
Technical specifications
- Layout: ISO1540
- Module type: bidirectional I2C isolator
- Power supply: from 3 V to 5 V
- Maximum clock frequency: up to 1 MHz
- Open drain outputs with current flow capability:
- side 1 : 3.5 mA
- side 2 : 35 mA
- HBM ESD protection 4 kV on all pins (8 kV on bus pins)
- Safety certifications:
- 4242-VPK insulation according to DIN VDE V 0884-11: 2017-01
- Isolation of 2500-VRMS for 1 minute in accordance with UL 1577
- CSA approval according to IEC 60950-1 and IEC 62368-1 final standards
- CQC basic insulation according to GB4943.1-2011
- Terminations:
- solder fields
- STEMMA QT / Qwiic connectors
- Working temperature: from -40°C to +125°C
- Dimensions: 25,4 x 17,8 mm
Kit contents
- Bidirectional I2C bus isolator module
- Goldpin connectors - 2.54 mm pitch
Bidirectional I2C isolator from Adafruit.
