--- product_id: 528023990 title: "DollaTek TCA9548A I2C IIC Multiplexer Breakout Board 8 Channel Expansion Board" brand: "dollatek" price: "51.57 DT" currency: TND in_stock: true reviews_count: 5 category: "Dolla Tek" url: https://www.desertcart.tn/products/528023990-dollatek-tca9548a-i2c-iic-multiplexer-breakout-board-8-channel-expansion store_origin: TN region: Tunisia --- # 1.65-5.5V wide voltage range 8-channel I2C expansion 400KHz max clock speed DollaTek TCA9548A I2C IIC Multiplexer Breakout Board 8 Channel Expansion Board **Brand:** dollatek **Price:** 51.57 DT **Availability:** ✅ In Stock ## Summary > 🔗 Unlock 8x I2C power — Expand smarter, not harder! ## Quick Answers - **What is this?** DollaTek TCA9548A I2C IIC Multiplexer Breakout Board 8 Channel Expansion Board by dollatek - **How much does it cost?** 51.57 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/528023990-dollatek-tca9548a-i2c-iic-multiplexer-breakout-board-8-channel-expansion) ## Best For - dollatek enthusiasts ## Why This Product - Trusted dollatek brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Expand Your I2C Universe:** Seamlessly connect up to 8 devices with a single multiplexer, eliminating address conflicts and boosting your project’s scalability. - • **Precision Timing at 400KHz:** Enjoy high-speed data communication with a max clock frequency of 400KHz, ensuring smooth and efficient signal multiplexing. - • **Customizable I2C Addressing:** Select from 8 unique I2C addresses (0x70-0x77) to tailor your device network and avoid bus collisions with ease. - • **Compact & Lightweight Design:** At just 20g and under 10x7 cm, this breakout board fits neatly into any workspace or prototype, keeping your setup sleek and professional. - • **Flexible Voltage Compatibility:** Operates effortlessly between 1.65V and 5.5V, perfect for diverse hardware setups and future-proofing your builds. ## Overview The DollaTek TCA9548A I2C Multiplexer Breakout Board is an 8-channel expansion board designed to simplify complex I2C device networks. Featuring a TCA9548A chip, it supports selectable I2C addresses from 0x70 to 0x77, operates across a wide voltage range of 1.65V to 5.5V, and delivers fast communication speeds up to 400KHz. Compact and lightweight, it’s ideal for professional-grade electronics projects requiring scalable and reliable I2C multiplexing. ## Description DollaTek trademark Reg.NO:013726393Specification:Interface: I2C IICChip: TCA9548ASelectable I2C address: 0x70-0x77Working Voltage: 1.65-5.5VMax Clock Frequency: 400KHzPackaged included:1x DollaTek TCA9548A I2C IIC Multiplexer Breakout Board 8 Channel Expansion Board Review: Really good multiplexer! - I have been testing the AS5600 rotation sensor which I am going to be using on a project, the sensor has a fixed address which means that only one of the devices can be connected at a time, this caused me a problem because I needed to connect 3 at once. This multiplexer takes i2c clock and data and breaks it out to 8 channels. This device (the multiplexer) appears on the i2c address 0x70 and has a register that allows you to enable and disable specific i2c channels. This allowed me to put an AS5600 on 3 different channels, and I can then simply select which i2c bus is active at any time and read the information from the sensor. You can have multiple "buses" connected at once, but in my case I simply needed one at a time so that I could read all 3 sensors as if they were the only connected device. It's a really good device for this kind of situation and works perfectly, it's also incredibly easy to drive so there's no tedious writing of drivers for it before you even get to the meat of your project. Good board. Good device. Good value! Review: Good - as described ## Features - Interface: I2C IIC - Chip: TCA9548A - Selectable I2C address: 0x70-0x77 - Working Voltage: 1.65-5.5V - Max Clock Frequency: 400KHz ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07DK63GMK | | Manufacturer | DollaTek | | Package Dimensions | 9.91 x 7.11 x 0.6 cm; 20 g | ## Images ![DollaTek TCA9548A I2C IIC Multiplexer Breakout Board 8 Channel Expansion Board - Image 1](https://m.media-amazon.com/images/I/61850c4YrHL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Really good multiplexer! *by A***E on 30 December 2021* I have been testing the AS5600 rotation sensor which I am going to be using on a project, the sensor has a fixed address which means that only one of the devices can be connected at a time, this caused me a problem because I needed to connect 3 at once. This multiplexer takes i2c clock and data and breaks it out to 8 channels. This device (the multiplexer) appears on the i2c address 0x70 and has a register that allows you to enable and disable specific i2c channels. This allowed me to put an AS5600 on 3 different channels, and I can then simply select which i2c bus is active at any time and read the information from the sensor. You can have multiple "buses" connected at once, but in my case I simply needed one at a time so that I could read all 3 sensors as if they were the only connected device. It's a really good device for this kind of situation and works perfectly, it's also incredibly easy to drive so there's no tedious writing of drivers for it before you even get to the meat of your project. Good board. Good device. Good value! ### ⭐⭐⭐⭐⭐ Good *by C***X on 25 April 2025* as described ### ⭐⭐⭐⭐⭐ Station météo 3 écrans *by J***. on 10 May 2025* Fonctionne parfaitement avec 3 écrans bicolore OLED 0,96" (temp. - Humi. - P Atm. ), un BME280 et un Arduino Nano. ## Frequently Bought Together - DollaTek TCA9548A I2C IIC Multiplexer Breakout Board 8 Channel Expansion Board - ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects - TUOFENG 28 awg Solid Wire-Solid Wire Kit-6 Different Colored 15 Meter spools 28 Gauge Jumper Wire -Hook up Wire Kit --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/528023990-dollatek-tca9548a-i2c-iic-multiplexer-breakout-board-8-channel-expansion](https://www.desertcart.tn/products/528023990-dollatek-tca9548a-i2c-iic-multiplexer-breakout-board-8-channel-expansion) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-28*