Qwiic - adapter 1,8V - SparkFun SPX-19017

A voltage adapter that allows you to adjust the voltage of 1.8 V to the 3.3 V level used in the Qwiic system. The module is used when the user has to connect an element with 1.8 V logic without a logic level regulator to a project implemented in the Qwiic standard. The presented converter provides a voltage of 1.8 V at a current of up to 300 mA , as well as a bidirectional translation of logical levels. It allows you to connect elements using the I2C bus with a voltage of 1.8 V.

Qwiic - voltage adapter 1.8 V - SparkFun SPX-19017 .

The pins of the module .

Qwiic SparkFun is an ecosystem that includes numerous sensors based on the I2C bus , executive modules and dedicated cables. The main assumption of this solution is to improve the prototyping process. All elements supporting the Qwiic standard use a common, 4-pin JST connector with a spacing of 1 mm . This reduces the amount of space required on the PCB. It also protects against connection inconsistent with the polarity.

The module has outputs in the form of solder fields , located on both sides of the printed circuit board. On one there are terminals for 3.3 V logic, on the other 1.8 V (marked in the picture on the right):

• GND - ground
• 3v3 - 3.3V logic
• SDA - Data line of the I2C bus
• SCL - The clock line of the I2C bus
• EN - Enable derivation
• 1v8 - 1.8V logic

The adapter also has two Qwiic connectors .

• The AP2127 LDO regulator provides a voltage of 1.8 V at 300 mA from the Qwiic bus
• The bi-directional PCA9306 chip handles I2C logic translation
• The LED indicates that the board is connected to the Qwiic bus (the diode can be turned off by using a soldering valve, which is useful when used in systems with low power consumption)
• Supported Connector Type: Qwiic
• Supported logical voltages: 1.8 V and 3.3 V
• Tile sizes: 26 x 26 x 4 mm

The 1.8V Qwiic voltage adapter is compact .

• Manufacturer's website
• Diagram of the module
• Eagle files
• Github repository