Description
The 7Semi BSS138 4-channel logic level converter is a compact breakout board that enables safe and reliable bi-directional voltage level shifting between devices operating at different logic levels. Designed primarily for I2C communication, it uses BSS138 N-channel MOSFETs with pull-up resistors, allowing for smooth signal translation between low- and high-voltage domains.
Technical Specification:
- Channels: 4 bidirectional channels
- Voltage Range (Low Side): ~1.8 V and above
- Voltage Range (High Side): Up to ~10 V
- MOSFET Type: BSS138 N-channel
- Pull-up Resistors: 10 kΩ on each line
- Interface Compatibility: I2C, UART/TTL, slow SPI (<2 MHz)
- Board Type: Assembled breakout module with 6-pin headers
- Dimensions: Compact size suitable for breadboard/prototyping
Features:
- Bidirectional level shifting using MOSFETs
- Supports a wide voltage range (1.8 V to 10 V)
- Works seamlessly with I2C, UART, and other digital signals
- Pre-soldered headers for easy integration into breadboards
- No need for manual direction control
- Plug-and-play functionality for mixed-voltage setups
- Low cost and ideal for DIY and embedded applications
Applications:
- Interfacing 3.3 V and 5 V devices (e.g., Arduino, Raspberry Pi, ESP8266)
- Level shifting between low-voltage MCUs and high-voltage peripherals
- I2C bus extension between devices with different voltage requirements
- TTL logic communication bridging
- Prototyping, testing, and educational electronics projects
- Sensor and module interfacing across voltage domains