Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Development, Learning, Evaluation & Industrial Control Boards |
| Origin | - |
| Chip Model | TCA9548A |
| Channel Count | 8 Independent I2C Channels |
| Operating Voltage | 3.3V to 5V DC |
| Interface Type | I2C / IIC Bus |
| Address Selection | Configurable via A0, A1, A2 Pins |
| Reset Function | Hardware Reset Pin Included |
| Board Dimensions | 45mm x 35mm |
| Mounting Holes | 4 x M3 Standard Holes |
| Compatibility | Arduino, Raspberry Pi, ESP32, STM32 |
| Package Contents | 1x TCA9548A Board, 1x Pin Header Set |
Anonymous
Mar 23, 2026
Rating: 5/5
Great for learning
Used this for my university embedded systems project. It made expanding the bus incredibly easy. The voltage levels work perfectly with both 3.3V and 5V microcontrollers.
Anonymous
Mar 20, 2026
Rating: 4/5
Solid build quality
Works exactly as described. The soldering on the pins was clean. Only minor issue is that the silk screen for the channel numbers is a bit small, but readable with a magnifier.
Anonymous
Mar 19, 2026
Rating: 5/5
No more address headaches
Finally, a simple solution for connecting multiple OLED displays and RTC modules on the same bus. The code library support for Arduino is excellent.
Anonymous
Mar 14, 2026
Rating: 5/5
Essential for complex projects
If you are building a robot with multiple I2C modules, this is a must-have. It handles the switching very fast and reliably. Documentation online is plentiful too.
Anonymous
Mar 10, 2026
Rating: 5/5
Perfect for sensor arrays
This board solved my address conflict issues immediately. I connected eight identical temperature sensors without any hassle. The reset function is a nice touch for debugging.
Anonymous
Mar 01, 2026
Rating: 4/5
Reliable multiplexer
We bought ten of these for our lab. They have been running continuously for weeks without dropping connections. Would give 5 stars if it came with standoffs included.
Q: Can this board handle 5V logic levels directly?
A: Yes, the TCA9548A supports operating voltages from 3.3V to 5V, making it compatible with most standard microcontrollers without level shifters.
Q: Does this support high-speed I2C modes?
A: The TCA9548A supports standard-mode (100 kHz) and fast-mode (400 kHz) I2C buses. It is not designed for high-speed (3.4 MHz) modes.
Q: Is there a library available for Python on Raspberry Pi?
A: Yes, you can use standard SMBus libraries in Python. There are also specific community-driven examples available on GitHub for controlling the channel selection.
Q: What happens if I pull the reset pin low?
A: Pulling the reset pin low will disable all channels and reset the internal register to its default state, effectively disconnecting all downstream devices until reconfigured.
Q: How do I change the I2C address of the board itself?
A: You can configure the board's address by setting the voltage levels on the A0, A1, and A2 pins. This allows up to 8 different addresses on the same bus.
ASY Gravure Printing Machine for Plastic Film, 6-Color Flexographic Printer for Shopping Bags
$86,400.00
Coil Refractory Cement for Medium-Frequency Furnace Repair - Fine High-Temperature Bonding Agent for Copper Coils (White/Red)
$7,800.00
Over-Toilet Storage Rack - No-Drill Bathroom Organizer Shelf for Restrooms and Washrooms, Space-Saving Storage Solution
$8.90
NIU NXT Instrument Cover for FXT/FX Electric Scooters – Waterproof Protective Case and Modification Accessory
$6.50
Anlin FK1 Cheyenne Tattoo Pen Silent Model All-in-One for Lining and Shading
$221.25
![[Osstem Dental Implants] Imported Dental Crowns and Bridges by Aizhier Oral Care for Partial Tooth Loss](https://www.gosteppe.com/cache/small/product/269993/legacy-main-02952134e1556f7660e1525f.webp)
[Osstem Dental Implants] Imported Dental Crowns and Bridges by Aizhier Oral Care for Partial Tooth Loss
$230.00
Heavy-Duty Multi-Layer Warehouse Shelving Unit for Storage, Retail, and Home Use
$252.00
Rattle Car Teether Wooden Bead Educational Soothing Teething Set Baby Photo Prop
$15.00
Roast Duck and BBQ Warmer Cabinet - Constant Temperature Heating Display Case for Crispy Pork Belly and Hanging Ducks
$710.00
Traditional Handmade Baby Rattle with Chewable Sheepskin for Newborns
$12.50
5pcs Lily tubular length 7cm fish tank aquarium glass
$9.90
Data Cable Interface Safety Case for iPhone, Apple, and Android Charging Cables - Child and Pet Proof
$16.80
Commercial Roast Duck Warmer Cabinet Constant Temperature Food Heater Display Counter for Cooked Meat
$1,494.00
Over-Toilet Storage Rack - Multi-Layer Bathroom Organizer with No-Drill Installation for Tank and Supplies
$17.92
Natural 7A White Azeztulite Loose Beads for DIY Handmade Bracelets, Spacer Beads, Multi-Gem Jewelry Accessories
$2.07
Hanyue Cordura N66 Rafting Bag Outdoor Swimming Trekking Clothes Storage Ultra-Light Waterproof Dry Bag
$35.70
Electromagnetic Planetary Stir-Fry Pot Sugar Fillings Pre-made Dish Cooking Equipment Tomato Sauce Chili Sauce Stir-Fry Machine
$3,940.00
Factory Direct 6L Stainless Steel Round Buffet Warmer - Electric Heating with Flip-Top Lid for Hotel and Restaurant Use
$764.00
Polishing Workshop Grinding Platform Plasma Cutting Welding Fume Dust Removal Environmental Equipment 3000 Airflow Grinding Platform
$6,000.00
Tongyue Food Warmer Cabinet - Large Capacity Home Kitchen Hot Dish Heater for Autumn and Winter
$607.20
Taikang Bybo Dental - Swiss Straumann ITI Dental Implants with Metal Abutments (TK)
$20,000.00
Marie's Sketching Blending Stump Set for Artists - Highlight, Shadow, and Detail Tools with Silicone Tips and Sponge Blenders
$15.30
Bottled Water Stand – Inverted Rack with Pump Dispenser for Large Mineral/Pure Water Jugs
$18.50
Sketching Blending Stump Set - Fine & Round Tip Tools with Replaceable Sponge Heads for Highlight Creation, Drawing Correction, and Tracing
$7.26
Automatic Retractable Air Hose Reel Auto Repair Car Wash Shop Electric Reel Water Drum PU Air Pipe Sandblasting Hose
$72.20
![[Live Stream Exclusive] Taikang Bybo Dental - South Korean Dentium Dental Implants for Tooth Loss Restoration](https://www.gosteppe.com/cache/small/product/269973/legacy-main-5e274b6981a80a22f7dc25a6.webp)
[Live Stream Exclusive] Taikang Bybo Dental - South Korean Dentium Dental Implants for Tooth Loss Restoration
$2,480.00
Food-Grade Silicone Soap Mold - Toast Shape with Little Angel Design zx228
$19.40
Ultra-Fast High-Adhesion Strong Clear Packing Tape 4.5/5.5 Width Packaging Tape Large Roll Free Shipping Extra Sticky Type
$729.50
Genuine Yokohama Tires 205/215/225/235/245 45/50/55/60/65 R16/17/18/19
$220.00
Marie's Paper Blending Pen Set for Soft Sketches and Pastels - Professional Art Student Tools Including Blending Knives, Balls, Sponges, and Egg-Shaped Blenders for Oil Pastels and Drawing on Newsprint or Xuan Paper
$3.80
![[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range](https://www.gosteppe.com/cache/medium/product/74667/legacy-main-4da8cadc5fc82afe91b124e3.webp)
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
