SparkFun QwiicBus I2C Range Extender - 30m

The SparkFun QwiicBus MidPoint allows you to extend the range of your I2C bus and easily tap into it to drop in devices wherever you would like. The QwiicBus uses NXP’s PCA9615 IC, which converts the two default I2C signals into four differential signals, two for SCL and two for SDA. The differential signals sent over Ethernet cables from the EndPoint connect to the breakout through the on-board RJ-45 connectors. The differential signaling allows the I2C signals to reach distances of up to 30 meters, while still maintaining their signal integrity. To make it even easier to get your readings, all communication is enacted exclusively via I2C, utilizing SparkFuns' handy Qwiic system so no soldering is required to connect it to the rest of your system. However, SparkFun have still broken out 2.54mm-spaced pins in case you prefer to use a breadboard.



The simplicity of the PCA9615 used on the QwiicBus boards is one of its biggest appeals. Other I2C communication methods require packetizing I2C communication into another protocol, be it RS-485 or 1-Wire. However, the PCA9615 keeps the I2C protocol by utilizing a differential transceiver.

The MidPoint also features a LMR33630 buck regulator users can enable to source larger amounts of current (up to [email protected]) to devices attached to the MidPoint.

Product Video

Quick Spec

• Uses the PCA9615 Buffer IC
• Includes the LMR33630 buck regulator for high-power applications
• I2C Supply Voltage Range: 2.3-5.5V
• Differential Supply Voltage Range: 3-5.5V
• Buck Regulator Supply Voltage Range: 3.6-36V
• Multiple power configurations depending on application needs
• 2 x Qwiic Connectors
• 2 x RJ45 Connectors

Resources

• Product Page
• Product Wiki
• Schematic
• Dimensions
• PCA9615 Datasheet
• LMR33630 Datasheet
• GitHub

Shipping List

• 1 x SparkFun QwiicBus I2C Range Extender - 30m