The PCA9548A is an eight-channel bidirectional I2C multiplexer, facilitating control of eight distinct I2C devices using a single host I2C bus. To integrate I2C sensors, simply connect them to the SC/SD multiplexed buses. Visualize the PCA9548A as a pivotal link between your Arduino and eight independent I2C buses. On one side, a solitary bus is connected to your Arduino. On the flip side, the PCA9548A branches out into eight I2C buses, with only one of these accessible to the Arduino at any given time. This configuration allows seamless management of multiple I2C devices through the convenience of a singular I2C bus connection.

Features

1. Efficient I2C Multiplexing
   The PCA9548A enables seamless communication with up to eight independent I2C buses, controlled by a single microcontroller. This capability eliminates the need for additional microcontroller pins, significantly simplifying circuit design while allowing multiple I2C devices to operate without interference.
2. Address Flexibility
   With configurable I2C addresses ranging from 0x70 to 0x77, the PCA9548A can be easily adapted for projects requiring multiple multiplexer modules on the same I2C bus. Address configuration is done via the A0, A1, and A2 pins, providing flexibility and scalability for advanced applications.
3. Wide Voltage Range
   Operating within a voltage range of 1.65V to 5.5V, the multiplexer ensures compatibility with various microcontrollers, from low-power 3.3V systems to standard 5V devices like Arduino. This makes it suitable for diverse electronic setups and ensures reliable performance across different platforms.
4. High-Speed Operation
   The device supports a maximum clock frequency of 400 kHz, enabling fast data transmission over the I2C bus. This feature is particularly beneficial for applications that require quick communication, such as real-time data monitoring or control systems.

Specifications

• Interface: I2C/IIC (Inter-Integrated Circuit protocol)
• Chip: TCA9548A multiplexer for I2C bus expansion
• Selectable I2C Address: Configurable from 0x70 to 0x77 via address pins (A0, A1, A2)
• Working Voltage: Operates within 1.65V to 5.5V range
• Max Clock Frequency: Supports up to 400 kHz clock speed for data transmission

Pinout :

Wiring with an Arduino board:

After connecting the PCA9548A multiplexer to the microcontroller using these configurations, sensors can be easily integrated by connecting them to the SCn / SDn pairs, where 'n' represents the channel number (e.g., SC1/SD1 for the first channel).

Package includes:

• 1 x Expansion Board PCA9548 8CH to 8 I2C Multiplexer