Product Introduction
You have 12C sensors and you want to connect two or three or more to your 12C sensor, when you realize "Oh, this chip has a fixed 12C address, and from what I know about 12C, you can't 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 super cool CJMCU-9548 to 812C multiplexer! Finally, a way to reach 8 identically addressed, 12C devices connected to a microcontroller - this multiplexer acts as a gatekeeper, shuttling commands to the selected 12C pin with your commands.
Using it is pretty simple: the multiplexer itself is on 12C address 0x70 (but can be adjusted from 0x70 to 0x77), you just write a byte to the desired number of multiplexed output ports, and BAM - any future 12C packets will be sent to that port. In theory you could have 8 multiplexers, each with 0x70-0x77 addresses in order to control 64 same-i2c-addressed-partos. Like all Adafruit breakouts, we put this nice chip on a breakout, so you can use it on a breadboard for capacitance and resistance detection, and use the card. Some headers are required, and once soldered can be plugged into a breadboard. The chip itself is 3v and 5v compatible so you can use it with any logic level.
Product Parameters
● Product name: TCA9548A module
● Operating voltage: 1.65V-5.5V
● 0 to 400kHz clock frequency
Supports voltage level conversion between 1.8V, 2.5V, 3.3V and 5V buses
● Three address pins [default 0x70] I2C bus supports up to eight TCA9548A devices
● Supports hot insertion
● Low standby current
● Output interface: 2.54mm pitch pin header
● Size: 31.5mm* 21.4mm (length*width)
Product Notes
1. Do not connect the power supply in reverse, otherwise there is a risk of burning the chip.
2. This module can only provide information, but does not provide technical support. Those who purchase the module must have the ability to read the chip documentation and self-study.
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