TCA9548A I2C multiplexer
9,17 €
The TCA9548A is a bus multiplexer I2C, manufactured by Texas Instruments. It allows a microcontroller to communicate, through I2C, with 8 integrated circuits having the same address.
- Description
- Product information
Description
You just found the perfect one 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 multiplexers!
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 youhat 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, we 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 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.
We even wrote up 10 minutes with nice diagrams, schematics and examples to get you running!
TECHNICAL INFO:
Producer's page
Datasheet
Tutorial
Schematic
Product information
| Weight | 0,05 kg |
|---|---|
| Length | 5x1x3 cm |
| BRAND | Adafruit |
