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TCA9548A I2C Multiplexer

SKU: ADA2717

$11.95 AUD, inc GST
$10.86 AUD, exc GST

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TCA9548A I2C Multiplexer
11.95 AUD

SKU: ADA2717

$11.95 AUD, inc GST
$10.86 AUD, exc GST
2 reviews 0 5 5
In stock, with a short lead time. 109 units dispatch in 4 to 7 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Fri, 25th of Aug with Express Post within Australia.
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You just found the perfect I2C sensor, and you want to wire up two or three or more of them to your Arduino when you realize "Uh oh, this chip has a fixed I2C address, and from what I know about I2C, you cannot have two devices with the same address on the same SDA/SCL pins!" Are you out of luck? You would be, if you didn't have this ultra-cool TCA9548A 1-to-8 I2C multiplexer!

Finally, a way to get up to 8 same-address I2C devices hooked up to one microcontroller - this multiplexer acts as a gatekeeper, shuttling the commands to the selected set of I2C pins with your command.

Using it is fairly straight-forward: the multiplexer itself is on I2C address 0x70 (but can be adjusted from 0x70 to 0x77) and you simply write a single byte with the desired multiplexed output number to that port, and bam - any future I2C packets will get sent to that port. In theory, you could have 8 of these multiplexers on each of 0x70-0x77 addresses in order to control 64 of the same-I2C-addressed-part.

Like all Adafruit breakouts, Adafruit put this nice chip on a breakout for you so you can use it on a breadboard with capacitors, and pullups and pulldowns to make usage a snap. Some header is required and once soldered in you can plug it into a solderless-breadboard. The chip itself is 3V and 5V compliant so you can use it with any logic level.

They even wrote up a nice tutorial with wiring diagrams, schematics and examples to get you running in 10 minutes!

Technical Details

Weight: 1.8g

Product Dimensions: 30.6mm x 17.6mm x 2.7mm / 1.2" x 0.7" x 0.1"

This product is listed in:

Documentation and Resources:
  • The Maker Revolution
  • The Maker Revolution celebrates the creation of new devices and the modification of existing ones - the transition from a consumer buying goods to eventually having a major part in their creation. The Maker Revolution places strong emphasis on free (...

Product Comments


Customer Reviews

  1. Review by Michael verified purchaser
    Rating
    100

    Item as described. (Posted on 5/10/2016)

  2. Review by Terrence verified purchaser
    Rating
    100

    This is an amazing little unit, because I have so many modules that communicate via I2C I had a few with the same address and this multiplexer allowed me to overcome this problem with ease, it also gave me the option to add and extra sensor to the weather station, 10/10 for this one. (Posted on 10/03/2016)

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.32 for Express Post (1-2 days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address:

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Please checkout our customer service page if you have other frequently asked questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.