4-channel I2C-safe Bi-directional Logic Level Converter - BSS138

The 4-channel I2C-safe Bi-directional Logic Level Converter is an essential tool for makers working with mixed-voltage systems. Designed especially for I2C, this board uses 4 BSS138 MOSFETs with 10K pullups, providing safe bi-directional level shifting between 1.8V and 10V signals.

This logic level converter is perfect for interfacing 3.3V devices with 5V systems, such as Arduino or Basic Stamp. It is compatible with I2C, TTL Serial, slow SPI (under 2MHz), and other digital signals requiring uni- or bi-directional level shifting.

Features:

• I2C-compatible bi-directional level shifting
• 4 channels for multiple signals
• Works between 1.8V (low side) and up to 10V (high side)
• Open-drain outputs with 10K pull-ups
• Fully assembled and tested PCB
• Includes 2 pieces of 6-pin headers for breadboard or perfboard use

Note: This board is not for driving loads from the high side; it is intended for logic level conversion only. The 10K pullups may make the interface a bit slower than some other level shifters (e.g., TXB0108, 74LVC245).