LaskaKit logic level converter I2C 5V to µShup 3.3V

Product detailed description

The LaskaKit I2C logic level converter 5V to uSup 3.3V is a miniature board that allows connecting 3.3V sensors and modules with a uSup connector to control boards with 5V logic, such as Arduino Uno or Arduino Mega. The 5V side features a pin header for connection to the control board, and the 3.3V side features a uSup connector for the sensor connection. Bidirectional level translation on the SDA and SCL lines is ensured by two MOSFET transistors, and 3.3V power for the connected sensor is produced by an integrated LDO regulator directly from 5V. The uSup connector is pin-compatible with SparkFun Qwiic and Adafruit STEMMA QT, so the converter also works for modules from these systems.

Specifications:

• Function: bidirectional I2C logic level converter 5V ↔ 3.3V
• Translated signals: SDA, SCL
• Level translation: 2× MOSFET BSS138, 10 kΩ pull-up resistors on both sides (SDA and SCL)
• Power Supply:
  • Input (5V side): 5V from the control board
  • Output for sensor (3.3V side): 3.3V from ME6211C33 LDO regulator, max. 500 mA
• Connection:
  • 5V side (control board): 4-pin header, 2.54 mm pitch – 5V, GND, SCL, SDA
  • 3.3V side (sensor/module): uSup connector (JST-SH 4-pin, 1 mm pitch, locking)
• Connector compatibility: uSup, SparkFun Qwiic, Adafruit STEMMA QT
• Dimensions:
  • PCB: approx. 12.7 × 16.5 × 1.6 mm
  • Mounting hole: 1× Ø 2.5 mm in the centre of the board
• Suitable for control boards with 5V logic, e.g.:
  • Arduino Uno rev3, original
  • LaskaKit Mega ADK 2560 R3
• Suitable sensors and modules with uSup, e.g.:
  • LaskaKit BME688 - Pressure, Temperature, Humidity and Air Quality Sensor
  • LaskaKit SGP41 - VOC and NOx Air Quality Sensor
  • LaskaKit SHT40 Air temperature and humidity sensor
  • LaskaKit BME280 Air pressure, temperature and humidity sensor
  • LaskaKit OLED Display - 128x64 1.3" I²C
• uSup connection cables:
  • uSup, STEMMA QT, Qwiic JST-SH 4-pin cable – 5 cm
  • μŠup, STEMMA QT, Qwiic JST-SH 4-pin cable – 10 cm
  • uSup, STEMMA QT, Qwiic JST-SH 4-pin cable – 20 cm

Package contents:

• 1× LaskaKit I2C logic level converter 5V to uSup 3.3V

Note:

• If your control board has 3.3V logic (e.g. ESP32, ESP8266), you do not need a converter – a μŠup – dupont female cable is sufficient.
• This product is not a standalone functional unit and may require professional installation.
• Product images are for illustrative purposes only and may sometimes differ from the actual appearance of the item. However, this does not change their basic properties.