CJMCU TCA9548A I2C 8 Channel Multiple Extensions Development Board

CJMCU TCA9548A I2C 8 Channel Multiple Extensions Development Board is a highly versatile I2C multiplexer module based on the TCA9548A chip. It allows up to eight I2C devices with the same address to be connected to a single microcontroller by dynamically switching channels via I2C commands.

Key Features of CJMCU TCA9548A Module:

• • 8 Channel Expansion: Controls up to 8 I2C buses individually.
  • Address Conflict Resolution: Allows multiple devices with the same I2C address to coexist.
  • Dynamic Switching: Channels can be switched via I2C commands during runtime.
  • Wide Compatibility: Works with Arduino, ESP32, Raspberry Pi, and other platforms.
  • Compact Design: Easy integration into projects due to small form factor.

Technical Specifications of CJMCU TCA9548A Module:

• • IC: TCA9548A
  • Operating Voltage: 1.65V – 5.5V
  • Communication Protocol: I2C
  • Default Address: 0x70 (adjustable via A0, A1, A2 pins)
  • Number of Channels: 8
  • Current Consumption: <2 mA (typical)
  • Dimensions: 28mm x 20mm

Mechanical Characteristics of CJMCU TCA9548A Module:

• • PCB Material: FR-4
  • Pin Header: 2.54mm standard pitch
  • Mounting Holes: 4 corner holes for screw mounting
  • Connector Type: Solderable male/female header support
  • Weight: Approximately 5g

Wiring Diagram and Connection of CJMCU TCA9548A:

• • Pin Configuration:
    • VCC: Power supply input (1.65V–5.5V)
    • GND: Ground
    • SDA/SCL: I2C data and clock from microcontroller
    • SDx/SCx: Individual channel SDA/SCL outputs (x = 0 to 7)
    • A0, A1, A2: I2C address configuration pins
  • Connection Notes:
    • Connect VCC and GND to microcontroller power lines
    • Connect SDA/SCL to I2C master lines
    • Configure address if using multiple modules
    • Select channels via I2C write command (0x01 to 0x80)

Applications of CJMCU TCA9548A Module:

• • Sensor Hubs: Connect multiple I2C sensors with identical addresses
  • Multi-Display Projects: Use multiple OLED or LCD I2C displays
  • IoT Gateways: Expand I2C sensors across different environments
  • Robotics: Manage multiple motor drivers or sensors on a single bus
  • Educational Platforms: Useful for complex microcontroller learning setups

Equivalent Models of CJMCU TCA9548A:

• • Adafruit TCA9548A: Premium version with Qwiic compatibility
  • GY-TCA9548A: Similar module with minor layout variation

Datasheet:

• • Download TCA9548A Datasheet (Texas Instruments)

Keywords for CJMCU TCA9548A:

• • CJMCU TCA9548A Module
  • I2C Multiplexer
  • 8 Channel I2C Switch
  • Multiple I2C Devices Same Address
  • I2C Expansion Board

Package Includes:

• • 1 x CJMCU TCA9548A I2C 8 Channel Expansion Module
  • 1 x Set of Male Header Pins