--- product_id: 128241216 title: "– TCA9548A I2C IIC Multiplexer Breakout Board 8 Channel Expansion Board" brand: "dollatek" price: "7790CFA" currency: XOF in_stock: true reviews_count: 7 category: "Dolla Tek" url: https://www.desertcart.sn/products/128241216-tca9548a-i2c-iic-multiplexer-breakout-board-8-channel-expansion-board store_origin: SN region: Senegal --- # 1.65-5.5V wide voltage range 8-channel I2C expansion 400KHz max clock speed – TCA9548A I2C IIC Multiplexer Breakout Board 8 Channel Expansion Board **Brand:** dollatek **Price:** 7790CFA **Availability:** ✅ In Stock ## Summary > 🔗 Unlock 8x the I2C power — connect smarter, build bigger! ## Quick Answers - **What is this?** – TCA9548A I2C IIC Multiplexer Breakout Board 8 Channel Expansion Board by dollatek - **How much does it cost?** 7790CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/128241216-tca9548a-i2c-iic-multiplexer-breakout-board-8-channel-expansion-board) ## 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 - • **Trusted by Pros:** Top-ranked in analog multiplexers, powering everything from flight sim panels to multi-sensor arrays—join the innovators. - • **Precision at Speed:** Supports up to 400KHz clock frequency, ensuring fast and reliable data communication for demanding applications. - • **Plug & Play Simplicity:** No complex driver coding needed—get your sensors and displays running instantly with straightforward channel selection. - • **Expand Your I2C Universe:** Seamlessly connect up to 8 devices with a single multiplexer, eliminating address conflicts and boosting your project’s scalability. - • **Flexible Voltage Compatibility:** Operates smoothly from 1.65V to 5.5V, perfect for diverse hardware setups and future-proofing your builds. ## Overview The DollaTek TCA9548A I2C Multiplexer Breakout Board expands your I2C bus into 8 selectable channels, resolving address conflicts and enabling multiple identical devices on one bus. Operating between 1.65V and 5.5V with a max clock speed of 400KHz, it’s ideal for complex sensor arrays and multi-display projects. Easy to integrate and highly reliable, it’s a must-have for professional-grade electronics prototyping. ## 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: Perfect Multiplexer - I use this board to allow me to use 6 OLED screens on a panel I am making for DCS F18C flight sim. Have tested the board with 5 screens working on a breadboard. Not enough room for the 6th screenon the breadboard. Worked perfectly. Now I just need to finish building the panel !! ## 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 | | Best Sellers Rank | 8,473 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 2 in Analog Multiplexers | | Guaranteed software updates until | unknown | | Manufacturer | DollaTek | | Package Dimensions | 9.91 x 7.11 x 0.6 cm; 20 g | ## Images ![– 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! ### ⭐⭐⭐⭐⭐ Perfect Multiplexer *by K***R on 7 October 2019* I use this board to allow me to use 6 OLED screens on a panel I am making for DCS F18C flight sim. Have tested the board with 5 screens working on a breadboard. Not enough room for the 6th screenon the breadboard. Worked perfectly. Now I just need to finish building the panel !! ### ⭐⭐⭐⭐⭐ Review *by C***X on 25 April 2025* as described ## 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.sn/products/128241216-tca9548a-i2c-iic-multiplexer-breakout-board-8-channel-expansion-board](https://www.desertcart.sn/products/128241216-tca9548a-i2c-iic-multiplexer-breakout-board-8-channel-expansion-board) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-05-22*