• TCA9548A I2C 8-channel multiplexer module for Arduino, showing header pins and component side.
  • Close-up of the purple PCB back side of the TCA9548A I2C multiplexer module, showing solder pads.
  • Internal block diagram of the TCA9548A I2C switch, showing bus control and connection logic.
  • Typical application circuit diagram for TCA9548A, connecting an I2C master to 8 separate channels.
  • TCA9548A Pin Functions table, listing pin name, number, type, and description.
  • TCA9548A I2C Slave Address table, showing how A0-A2 inputs determine the address.
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TCA9548A 1-to-8 I2C Multiplexer Module IIC 8-Channel Expansion Board

TCA9548A 1-to-8 I2C Multiplexer Module IIC 8-Channel Expansion Board

HK$20.00
HK$20.00
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Delivery Options

  • Local delivery within Hong Kong and in-store pickup.​
  • Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.​
  • Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).​
  • Estimated delivery time: 1–3 business days after dispatch (Hong Kong).​
  • In-store pickup details (location and time) will be confirmed by email or phone message.​
  • Delivery times are estimates and may be affected by weather or unforeseen circumstances.​

The TCA9548A 1-to-8 I2C Multiplexer Module allows you to connect multiple I2C devices with the same address to a single I2C port—ideal for Arduino, ESP32, Raspberry Pi, and other microcontroller projects.
This module solves I2C address conflicts and expands your system’s capability to handle up to 64 identical I2C devices when cascading multiple boards.

Key Features

  • TCA9548A Chip —Stable I2C switching with eight bidirectional channels.
  • 1-to-8 Expansion —Each board provides 8 independent I2C channels.
  • Address Selectable (0x70–0x77) —Supports cascading up to 8 expanders.
  • Wide Operating Voltage —1.65V–5.5V; ideal for 1.8V, 3.3V, and 5V systems.
  • 400kHz I2C Clock —Compatible with fast-mode I2C communication.
  • Level Shifting Support —Different voltage buses can coexist across channels.
  • Reset & Protection —Active-low reset, no glitch during power-up, SMBus compatibility.
  • Built-In Pull-Up Resistors —/RESET, SDA, SCL, A0–A2 pins already include 10K pull-ups.

Applications

  • Projects with multiple identical sensors
  • Robotics & automation
  • Multi-channel data acquisition
  • IoT devices
  • Prototyping and development boards

Product Specifications

  • Chipset: TCA9548A
  • Interface: I2C / IIC
  • Address Range: 0x70–0x77
  • Operating Voltage: 1.65V–5.5V
  • I2C Clock: 0–400kHz
  • Operating Temperature: −40°C to +85°C
  • Board Size: 31.5mm × 21.4mm
  • Mounting Holes: 2 × M3

Package Includes

  • 1 × TCA9548A I2C Multiplexer Breakout Board
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