SparkFun
SparkFun Level Translator Breakout - PCA9306
The SparkFun PCA9306 Level Translator Breakout provides dual bidirectional voltage-level translation for I2C and SMBus lines. It lets you safely connect devi...
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The SparkFun PCA9306 Level Translator Breakout provides dual bidirectional voltage-level translation for I2C and SMBus lines. It lets you safely connect devices operating at different logic levels — for example, a 3.3V sensor to a 5V microcontroller — without a direction pin. Simply apply your reference voltages and enable the translator.
The PCA9306 supports a low-side voltage range of 1.2–3.3V and a high-side range of 1.8–5.5V. The breakout includes a broken-out enable pin and a second ground pin for convenient wiring.
Key Features
- Dual Bidirectional Translation – Two channels for SDA and SCL (or any two signals)
- No Direction Pin – Automatic bidirectional level shifting
- Low Side – 1.2V to 3.3V (VREF1)
- High Side – 1.8V to 5.5V (VREF2)
- I2C & SMBus Compatible – Open-drain bidirectional translation
- Enable Pin – Broken out for software control
Ideal For
- Connecting 3.3V I2C sensors to 5V Arduino boards
- Mixed-voltage I2C bus systems
- Interfacing between different logic-level devices
- Any project requiring bidirectional voltage translation
Package Contents
- 1× SparkFun PCA9306 Level Translator Breakout
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny contacts.
- 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.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
Find this product in
Brands
PCA9306 Level Translator Schematic
Schematic · 73.4 KB · Click any page to view full size
PCA9306DC Datasheet
Datasheet · 1.3 MB · Click any page to view full size
PCA9306 Breakout Schematic
Schematic · 29.8 KB · Click any page to view full size
PCA9306DC Datasheet
Datasheet · 439.6 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 581.8 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
