{"product_id":"tca9548a-i2c-multiplexer-breakout-board-8-channel-iic-module","title":"TCA9548A 8-Channel I2C Multiplexer Breakout Board for Arduino","description":"\n\u003ch2\u003eTCA9548A 8-Channel I2C Multiplexer Breakout Board\u003c\/h2\u003e\n\u003cp\u003eExpand your microcontroller projects effortlessly with the \u003cstrong\u003eCJMCU-9548 TCA9548A I2C Multiplexer Development Board\u003c\/strong\u003e. This compact breakout board lets you connect up to \u003cstrong\u003e8 I2C devices sharing the same address\u003c\/strong\u003e to a single microcontroller — eliminating address conflicts and simplifying complex multi-sensor builds. Whether you're working with Arduino, Raspberry Pi, or any other I2C-compatible platform, this board is the clean, reliable solution for scaling your electronics projects.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8 Independent I2C Channels:\u003c\/strong\u003e Connect up to 8 I2C peripherals — each channel is individually controlled via the I2C bus using bidirectional switching.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAddress Conflict Resolution:\u003c\/strong\u003e Easily connect multiple sensors or modules that share the same I2C address without any hardware modifications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlug-and-Play Compatibility:\u003c\/strong\u003e Works seamlessly with Arduino, Raspberry Pi, ESP32, STM32, and other popular development platforms.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCascadable Design:\u003c\/strong\u003e Chain multiple TCA9548A boards together for even greater expansion — up to 64 additional I2C devices on a single bus.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight:\u003c\/strong\u003e Measures just 32.00 × 22.00 × 3.00 mm (1.26 × 0.87 × 0.12 in), making it ideal for space-constrained enclosures and prototypes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBidirectional Voltage Translation:\u003c\/strong\u003e Supports both 3.3V and 5V logic levels, providing flexibility across different hardware ecosystems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfigurable Address Pins:\u003c\/strong\u003e Three onboard address selection pins (A0, A1, A2) allow up to 8 boards to coexist on one bus.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChip:\u003c\/strong\u003e TCA9548A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e I2C \/ IIC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Channels:\u003c\/strong\u003e 8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 1.8V – 5.5V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDefault I2C Address:\u003c\/strong\u003e 0x70 (configurable up to 0x77)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 32.00 × 22.00 × 3.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Platforms:\u003c\/strong\u003e Arduino, Raspberry Pi, ESP32, STM32, and more\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × CJMCU-9548 TCA9548A I2C Multiplexer Breakout Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho Is This For?\u003c\/h3\u003e\n\u003cp\u003eThis board is a must-have for hobbyists, students, engineers, and makers who build multi-sensor systems, robotics, IoT devices, or any project requiring multiple I2C components. It's a small board with a big impact on your workflow.\u003c\/p\u003e\n\n\u003cp\u003eFor more information on I2C bus standards and best practices in embedded systems, visit the \u003ca href=\"https:\/\/www.nist.gov\/publications\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eNIST Publications Library\u003c\/a\u003e for technical standards references.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eQ: What does the TCA9548A I2C Multiplexer Breakout Board do?\u003c\/h4\u003e\n\u003cp\u003eA: The TCA9548A is an 8-channel I2C multiplexer that allows you to connect up to 8 I2C devices — even ones that share the same I2C address — to a single microcontroller's I2C bus. Each channel is independently enabled via the I2C interface, so your controller can communicate with each device without address conflicts.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the CJMCU-9548 TCA9548A compatible with Arduino and Raspberry Pi?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The TCA9548A multiplexer breakout board is fully compatible with Arduino, Raspberry Pi, ESP32, STM32, and virtually any microcontroller or single-board computer that supports the I2C\/IIC protocol. It supports both 3.3V and 5V logic levels for broad compatibility.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I chain multiple TCA9548A boards together?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The CJMCU-9548 features three configurable address pins (A0, A1, A2), allowing up to 8 boards to be used on the same I2C bus simultaneously. This means you can expand your system to communicate with up to 64 additional I2C devices from a single master controller.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I select which I2C channel is active on the TCA9548A?\u003c\/h4\u003e\n\u003cp\u003eA: You communicate with the TCA9548A over I2C and write a control byte to it specifying which channel(s) to enable. Channels are individually selectable via bits in the control register, and multiple channels can be active simultaneously if needed.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What are the dimensions of this breakout board?\u003c\/h4\u003e\n\u003cp\u003eA: The CJMCU-9548 TCA9548A breakout board measures 32.00 × 22.00 × 3.00 mm (approximately 1.26 × 0.87 × 0.12 inches), making it very compact and easy to integrate into any project enclosure or breadboard setup.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the TCA9548A I2C Multiplexer Breakout Board do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The TCA9548A is an 8-channel I2C multiplexer that allows you to connect up to 8 I2C devices — even ones that share the same I2C address — to a single microcontroller's I2C bus. 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