> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # SparkFun Qwiic Mux Breakout - 8 Channel (TCA9548A) **Type:** Product page · **SKU:** BOB-16784 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia) **Page:** https://core-electronics.com.au/sparkfun-qwiic-mux-breakout-8-channel-tca9548a-47206.html ([markdown](https://core-electronics.com.au/sparkfun-qwiic-mux-breakout-8-channel-tca9548a-47206.html.md)) Do you have too many sensors with the same I2C address? Put them on the SparkFun Qwiic Mux Breakout to get them all talking on the same bus! The Qwiic Mux Breakout... ## Pricing - **Price:** $24.95 (inc GST) — $22.68 AUD, exc GST - **Quantity discounts:** 5+ $22.00 (exc GST) · 25+ $21.55 (exc GST) · 100+ $20.64 (exc GST) ## Availability & dispatch - Available with a lead time — expect dispatch between Aug 25 and Aug 31. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=BOB-16784:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/BOB-16784:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## Description Do you have too many sensors with the same I2C address? Put them on the SparkFun Qwiic Mux Breakout to get them all talking on the same bus! The Qwiic Mux Breakout enables communication with multiple I2C devices that have the same address that makes it simple to interface with. The Qwiic Mux also has eight configurable addresses of its own, allowing for up to 64 I2C buses on a connection. To make it even easier to use this multiplexer, all communication is enacted exclusively via I2C, utilizing our handy Qwiic system. The Qwiic Mux also allows you to change the last three bits of the address byte, allowing for eight jumper selectable addresses if you happen to need to put more than one Qwiic Mux Breakout on the same I2C port. The address can be changed by adding solder to any of the three ADR jumpers. Each SparkFun Qwiic Mux Breakout operates between 1.65V and 5.5V making it ideal for all of the Qwiic boards Sparkfun produce in house. *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.* [Get Started with the SparkFun Qwiic Mux Breakout Guide](https://learn.sparkfun.com/tutorials/qwiic-mux-hookup-guide)**Features** - Operating Voltage: 1.65V - 5.5V - Operating Temperature: -40 - 85° C - I2C Address: 0x70 (default) up to 0x77 - 10x Qwiic Connectors - 2x Pass Through (*Daisy Chain*) - 8x Channels **Revision Changes:** With this revision of the SparkFun Qwiic Mux Breakout, Sparkfun have only made one change to improve the ease of use of the board, listed below. If users are unsure about which version they purchased, please refer to the product pictures. - The SparkFun Qwiic Mux Breakout includes an additional Qwiic connector with a pass through trace to bypass the MUX and daisy chain other Qwiic boards. **Documents** - [Schematic (v1.1)](https://core-electronics.com.au/attachments/localcontent/Qwiic_Mux_Schematic_16494f3d0d9.pdf) - [Eagle Files (v1.1)](https://core-electronics.com.au/attachments/localcontent/Qwiic_Mux_Eagle_Files_15249120bd2.zip) - [Hookup Guide](https://learn.sparkfun.com/tutorials/qwiic-mux-hookup-guide) - [Board Dimensions (v1.1)](https://core-electronics.com.au/attachments/localcontent/Qwiic_Mux_Dimensions_4300231de53.pdf) - [TCA9548A Datasheet](https://core-electronics.com.au/attachments/localcontent/tca9548a_2279022bb88.pdf) (TCA9548A) - [SparkFun I2C Mux Arduino Library](https://github.com/sparkfun/SparkFun_I2C_Mux_Arduino_Library) - [SparkFun TCA9548A Python Package](https://github.com/sparkfun/Qwiic_TCA9548A_Py) - [ReadtheDocs Documentation](https://qwiic-tca9548a-py.readthedocs.io/en/latest/?) - [Qwiic Resource Page](https://www.sparkfun.com/qwiic) - [GitHub Hardware Repository (v1.1)](https://github.com/sparkfun/Qwiic_Mux_TCA9548A/tree/v1.1) ## Images - [Product image 1](https://core-electronics.com.au/media/catalog/product/1/6/16784-sparkfun_qwiic_mux_breakout_v2_-_8_channel__tca9548a_-01.jpg)