SparkFun
SparkFun Logic Level Converter - Bi-Directional
The SparkFun Bi-Directional Logic Level Converter safely translates signals between different voltage levels — stepping 5V down to 3.3V and 3.3V up to 5V on ...
The SparkFun Bi-Directional Logic Level Converter safely translates signals between different voltage levels — stepping 5V down to 3.3V and 3.3V up to 5V on the same channel. It also works with 2.8V and 1.8V devices, making it a versatile bridge between mixed-voltage systems.
Each board provides 4 bi-directional channels with clearly labelled high-side and low-side pins. Simply connect your high voltage to HV, low voltage to LV, and a common ground — signals are shifted automatically in both directions.
Key Features
- Bi-Directional – Steps up and steps down on the same channel simultaneously
- 4 Channels – Convert 4 signals at once (2 inputs + 2 outputs per side)
- Flexible Voltage – Works with 1.8V, 2.8V, 3.3V, and 5V logic levels
- BSS138 MOSFETs – Reliable, proven level-shifting circuit
- Compact – 16.05 × 13.33 mm (0.63" × 0.52")
Ideal For
- Connecting 3.3V sensors to 5V Arduino boards
- Interfacing Raspberry Pi (3.3V) with 5V peripherals
- I²C and SPI bus level shifting
- Any project mixing different logic voltage levels
Package Contents
- 1× SparkFun Bi-Directional Logic Level Converter
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- SPI
- A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
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Brands
BSS138 Datasheet
Datasheet · 121.1 KB · Click any page to view full size
Logic Level Converter Schematic
Schematic · 42.9 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 670.1 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
