TCA9548A I2C Multiplexer Module 1-to-8 Channel PCA9548A IIC Expansion Board

Description �� TCA9548A I2C Multiplexer Module – 1-to-8 Channel I²C Expansion Board PCA9548A | AuscomTech Expand your I²C bus the right way with the TCA9548A 1-to-8 Channel I2C Multiplexer Module, perfect for projects where multiple devices share the same I²C address.This module allows you to connect up to 8 identical I²C sensors or peripherals to a single microcontroller, completely eliminating address conflicts and bus overload. Whether you’re working with Arduino, ESP32, Raspberry Pi, STM32, or MicroPython, the TCA9548A makes advanced multi-sensor setups far simpler and more reliable. ⚙️ Key Features �� 1-to-8 Channel I2C Expansion Routes I²C communication to any of 8 selectable downstream channels Only one I²C device is active on the bus at a time → prevents address conflicts Perfect for: Multiple OLED displays Arrays of sensors (e.g., multiple BME280, MPU6050, MLX90614, ADS1115, etc.) Robotics & automation Data acquisition systems �� Simple Control via I²C The multiplexer itself uses address 0x70–0x77 (configurable via A0–A2).Just write one byte to choose which downstream channel to enable. Example:Write 0x04 → activates channel SC2/SD2Write 0x80 → activates channel SC7/SD7 �� Technical Specifications Parameter Details Chipset TCA9548A / PCA9548A compatible Supply Voltage 1.65V–5.5V Logic Level 3.3V / 5V compatible I²C Address Range 0x70 – 0x77 Frequency Up to 400 kHz I²C Fast-Mode Channels 8 completely isolated downstream buses Reset Pin Yes (RST pin available) Size 31.5 × 21.7 mm Weight 4.20 g �� Why Use a TCA9548A Multiplexer? ✔ Solve I²C address conflicts✔ Run long cables with reduced noise✔ Clean bus management for large sensor networks✔ Expand up to 64 devices using 8 multiplexers✔ Compatible with almost every microcontroller platform If you need more sensors than your microcontroller can natively support — this is the module you want. �� Compatible With Arduino UNO / Mega / Nano ESP8266 / ESP32 Raspberry Pi (all models) STM32 / Blue Pill / RP2040 BeagleBone MicroPython & CircuitPython Home Assistant (via ESPHome) �� Package Includes 1 × TCA9548A 1-to-8 I2C Expansion Board (PCA9548A Compatible)