Name: I2C Multiplexer Module TCA9548A
SKU: 13971
Price: 500.00 ETB
Availability: InStock

I2C Multiplexer Module TCA9548A

Br 500.00

The TCA9548A is an I2C multiplexer that allows up to 8 devices with the same I2C address to be hooked up to an MCU or permits up to 8 separate I2C buses to be controlled.
The CJMCU TCA9548A I2C 8 Channel Multiple Extensions Development Board is interesting in that it has an I2C address (0x70 by default) – and you basically send it a command to tell it which I2C multiplexed output you want to talk to, then you can address the board you want to address.
1-to-8 Bidirectional Translating Switches
Supports Hot Insertion
Low Standby Current
Active-Low Reset Input
Power Up With All Switch Channels Deselected
I2C Bus and SMBus Compatible
3.3 & 5V operation
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II

CJMCU TCA9548A I2C 8 Channel Multiple Extensions Development Board
The adapter is connected to an I2C device with multiple identical addresses on the same I2C port on the main control board for normal communication and use.�There are 8 I2C interfaces on one expander, and there are eight bidirectional transfer switches that can be controlled by I2C bus.

Vin – this is the power pin. Since the sensor chip uses 3-5 VDC. To power, the board, give it the same power as the logic level of your microcontroller – e.g. for a 5V micro like Arduino, use 5V.
GND – common ground for power and logic.

SCL�– this is the I2C clock pin for the chip itself, connect to your microcontrollers I2C clock line.
SDA�– this is the I2C data pin for the chip itself, connect to your microcontrollers I2C data line.
RST�– this is the reset pin, for resetting the multiplexer chip. Pulled high by default, connect to ground to reset
A0 A1 A2 – these are the address selection pins for the multiplexer. By default, the multiplexer is at address 0x70 and these three pins are pulled low. Connect them to Vin to set the address to 0x71 – 0x77.
A0 is the lowest-significant bit (if it is pulled high, it will increase the address by 1).
A1 is the 2nd-lowest-significant bit (if it is pulled high, it will increase the address by 2).
A2 is the 3rd-lowest-significant bit (if it is pulled high, it will increase the address by 4).

I2C Multiplexed-Side pins:

SDx and SCx: There are 8 sets of SDx and SCx pins, from SD0/SC0 to SD7/SC7. These are the multiplexed pins. Each one is a completely separate I2C bus set. So you have 8 I2C devices with identical addresses, as long as they are on one I2C bus each.
These pins do not have any pullups installed, so if you are using a chip or breakout without I2C pull-ups be sure to add them! Nicely, you can have Vin be 3.3V and have these pins pulled up to 5V (that is, they are 5V compliant).