SparkFun QwiicBus - EndPoint

The SparkFun QwiicBus EndPoint is a quick and efficient solution for extending the range of your I²C communication bus. This device employs the PCA9615 IC from NXP to transform the standard I²C signals into four differential signals. With the help of an Ethernet cable connected via the built-in RJ-45 connectors, these differential signals can travel up to 30.48 meters while maintaining their integrity. The QwiicBus EndPoint exclusively uses I²C for communication, leveraging the Qwiic system to eliminate the need for soldering. For those who prefer using a breadboard, 2.54mm-spaced pins are available.

The QwiicBus EndPoint stands out for its simplicity. While other I²C communication methods necessitate the conversion of I²C communication into different protocols like RS-485 or 1-Wire, the PCA9615 maintains the I²C protocol by using a differential transceiver.

In the updated version of the Differential I²C Breakout, two 2.54mm-spaced pins are connected to the spare pair of wires on the RJ-45 connectors. This feature allows users to utilize the extra pair as they see fit.

The QwiicBus EndPoint is an ideal solution for those who need to extend the range of an I²C sensor on a noise-prone autonomous vehicle or those who wish to establish a large sensor network in a home or office. It offers an effective way to increase distance and reduce noise susceptibility.

The SparkFun Qwiic Connect System is a comprehensive ecosystem of I²C sensors, actuators, shields, and cables that simplifies prototyping and reduces the potential for errors. All Qwiic-enabled boards use a standard 1mm pitch, 4-pin JST connector, which minimizes the required PCB space. The polarized connections ensure a correct and error-free hookup.

Features of the SparkFun QwiicBus EndPoint include the use of the PCA9615 buffer IC, an I²C supply voltage range of 2.3-5.5V, a differential supply voltage range of 3-5.5V, and multiple power configurations to suit various application needs. It can extend the I²C bus up to 30.48 meters and has two Qwiic connectors.