TCA9548 TCA9548A 1-to-8 I2C 8 -way Multi-Channel IIC I2C Expansion Board

Features :
• 1-to-8 Bidirectional Translating Switches.
• Supports Hot Insertion.
• Low Standby Current.
• 1-to-8 Bidirectional Translating Switches.
• Active-Low Reset Input.
• Power Up with All Switch Channels Deselected.
• I2C Bus and SMBus Compatible.
• 5-V Tolerant Inputs.
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
Pin Description :
Power Pins:
• 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 UNO, use 5V.
• GND – common ground for power and logic.
• I2C Control-Side pins :
• 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.
&bull