Adafruit
Adafruit LTC4316 I2C Address Translator
· MPN: ADA5914
The Adafruit LTC4316 I2C Address Translator solves one of I2C's most frustrating limitations: address conflicts. When two devices share the same fixed I2C ad...
Get notified when back in stock
The Adafruit LTC4316 I2C Address Translator solves one of I2C's most frustrating limitations: address conflicts. When two devices share the same fixed I2C address, this chip performs on-the-fly address translation — devices on the output side appear at a different address to the controller on the input side, with no code changes needed on the device itself.
The translation works by XOR-ing the device address with a configurable bitmask. Two onboard DIP switches let you flip address bits A4, A5, and A6, giving you four translation options per device. For even more flexibility, a solder pad accepts an XOR_LOW resistor to set the bottom 3 address bits according to the datasheet values.
Key Features
- On-the-Fly Address Translation – Transparently remaps I2C addresses using XOR logic
- Two DIP Switches – Four address translation options by flipping bits A4, A5, and A6
- Optional XOR_LOW Resistor – Solder pad for setting bottom 3 address bits for additional options
- Transparent to Devices – Connected devices still see their original address; only the controller sees the translated address
- STEMMA QT / Qwiic – Solderless I2C connectors on both sides (input and output)
Ideal For
- Resolving I2C address conflicts between identical sensors
- Running multiple copies of fixed-address I2C devices on one bus
- Expanding I2C sensor networks without multiplexer code overhead
- Projects where device drivers support configurable addresses
Package Contents
- 1× Adafruit LTC4316 I2C Address Translator (STEMMA QT)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- I2C address
- An I2C address is the number a device uses so a microcontroller can tell it apart from other devices on the same I2C bus. It matters because two devices with the same fixed address may conflict if used together.
- multiplexer
- A multiplexer (mux) is a chip or circuit that selects one of several input signals and routes it to a single shared output, with select lines choosing which input is connected; running the same idea in reverse, to send one input to a chosen output, gives a demultiplexer. Multiplexers let a single controller or line work with several signals or devices that would otherwise clash on a shared connection.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
- STEMMA QT
- A small plug-in connector system for I2C boards that lets you connect compatible sensors and controllers without soldering. It matters because it can make wiring faster and less error-prone, especially when adding several small modules to a project.
working with i2c devices
Document · 1.6 MB · Click any page to view full size
introducing adafruit stemma qt
Document · 1.5 MB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
