SparkFun QwiicBus - MidPoint

The SparkFun QwiicBus MidPoint is an exceptional tool designed to extend the range of your I²C bus, allowing you to easily integrate devices wherever needed. Utilizing NXP’s PCA9615 IC, the QwiicBus MidPoint converts the two default I²C signals into four differential signals, two each for SCL and SDA. These differential signals are sent over Ethernet cables from the EndPoint to the breakout through the on-board RJ-45 connectors, maintaining signal integrity over distances of up to 30.48 meters.

The QwiicBus MidPoint's key appeal lies in the simplicity of the PCA9615. Unlike other I²C communication methods that require packetizing I²C communication into another protocol like RS-485 or 1-Wire, the PCA9615 retains the I²C protocol using a differential transceiver. This makes it incredibly straightforward to use, even for beginners.

Additionally, the MidPoint features a LMR33630 buck regulator. This allows users to source larger amounts of current (up to 3A@3.3V) to devices attached to the MidPoint, making it ideal for high-power applications.

The SparkFun Qwiic Connect System is an ecosystem of I²C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can’t hook it up wrong.

Features of the SparkFun QwiicBus MidPoint include the use of the PCA9615 Buffer IC, inclusion of the LMR33630 buck regulator for high-power applications, I²C Supply voltage range of 2.3-5.5V, Differential Supply voltage range of 3-5.5V, Buck Regulator Supply Voltage Range of 3.6-36V, multiple power configurations depending on application needs, 2x Qwiic Connectors and 2x RJ45 Connectors.