The SparkFun Qwiic Mux Breakout conquers a common I2C roadblock: conflicting device addresses. This nifty multiplexer acts as a bridge, allowing up to 8 I2C devices with identical addresses to coexist on a single bus. The magic lies in its 8 configurable addresses, effectively creating virtual I2C lanes for each device. Universally compatible with both I2C and SMBus protocols, it seamlessly integrates with a vast range of sensors and I2C modules. Furthermore, the Qwiic Mux offers additional features like voltage translation for different power levels and hot-swapping for convenient device insertion/removal. This makes it a powerful asset for I2C enthusiasts working on complex sensor networks or projects requiring expanded I2C device connectivity.

 

Features

• Bidirectional Translating Switches: Facilitates communication between multiple I2C devices.
• Configurable Addresses: Offers eight jumper-selectable addresses for customization.
• I2C Compatibility: Supports I2C bus and SMBus, ensuring compatibility with a wide range of devices.
• Active-Low Reset Input: Allows resetting of the device via a dedicated input.
• Voltage-Level Translation: Enables voltage translation between different buses, accommodating various voltage levels (1.8V to 5V).
• Hot Insertion Support: Supports hot insertion of devices without affecting functionality.
• Low Standby Current: Ensures energy efficiency during standby mode.
• Wide Operating Voltage Range: Operates between 1.65V and 5.5V, suitable for diverse applications.
• ESD Protection: Provides robust protection against electrostatic discharge, ensuring reliability.
• Temperature Range: Operates reliably in temperatures ranging from -40°C to 85°C.

Specifications

• Operating Voltage: 1.65V - 5.5V
• Operating Temperature: -40°C to 85°C
• I2C Address: 0x70 (default), configurable up to 0x77
• Connectors: 10x Qwiic connectors, 2x Pass-through connectors (daisy chain)
• Channels: 8x bidirectional translating switches

Pinout:

The SparkFun Qwiic Mux Breakout doesn't utilize individual pins for specific functions like traditional I2C breakouts. Instead, it functions as a multiplexer for existing I2C devices:

• I2C Interface: It uses the standard I2C protocol (SCL, SDA) for communication with the microcontroller.
• Qwiic Connectors: It offers 10 Qwiic connectors (5 on each side) for daisy-chaining multiple I2C devices or connecting them to the microcontroller via a Qwiic cable. These connectors follow the standard Qwiic pinout with:
  • Yellow wire - SCL
  • Blue wire - SDA
  • Red wire - 3.3V
  • Black wire - Ground
• Pass-Through: It includes 2 additional pass-through connectors specifically for daisy-chaining multiple Qwiic Muxes if needed.

Applications

• Sensor networks: Manage and communicate with multiple sensors on a single I2C bus.
• I2C device expansion: Connect more I2C devices than your microcontroller can handle natively.
• Prototyping: Easily test and integrate various I2C devices during development.

Dimensions

Documents:

• SparkX (R&D)
  • Schematic (PDF)
  • Eagle Files (ZIP)
  • Product GitHub Repo
• Version 1.0
  • Schematic (PDF)
  • Eagle Files (ZIP)
  • Product GitHub Repo
• Version 1.1
  • Schematic (PDF) (v1.1)
  • Eagle Files (ZIP) (v1.1)
  • Board Dimensions - (v1.1) Dimensions are in inches and the mounting holes are for M3 screws (x4).
  • Product GitHub Repo (v1.1)
  • Product Video
• Datasheet:
  • TCA9548A
  • PCA9548A
• Arduino Example Code:
  • Arduino Example (ZIP)
  • I2C Mux Arduino Library
  • MMA8452Q Arduino Library
• TCA9548A Python Package
  • ReadtheDocs Documentation
• Product GitHub Repo
• SparkFun Product Showcase: Qwiic Mux
  • Gist: Light Spectrogram
• Qwiic Landing Page

Package Includes

• 1x SparkFun Qwiic Mux Breakout