Electrical and Functional Specifications
Voltage compatibility: 3.3V and 5V logic levels
Signal direction: Bidirectional
Number of channels: 4
Maximum stable communication baud rate: 28800 bps
Supported protocols: UART, I2C (IIC), SPI, 1-Wire
Conversion mode: Supports bidirectional level shifting between LV(1-4) and HV(1-4); also supports unidirectional down-conversion from HV to LVPhysical Specifications
Module dimensions: 15 mm × 12.8 mm (0.59 in × 0.50 in)
Weight per module: 1.9 g (0.07 oz)
Package quantity: 20 pcsPin Definitions (per module)
AVCC: Connect to 5V system power supply
ASCL: Connect to 5V system SCL signal line
ASDA: Connect to 5V system SDA signal line
AGND: Connect to 5V system ground
BVCC: Connect to 3.3V system power supply
BSCL: Connect to 3.3V system SCL signal line
BSDA: Connect to 3.3V system SDA signal line
BGND: Connect to 3.3V system groundUsage Characteristics
Compatible with standard breadboards; no soldering required
Enables serial communication between 5V and 3.3V devices
Suitable for applications such as: communication between 5V and 3.3V microcontrollers, interfacing a 3.3V programmer with a 5V microcontroller, and connecting 5V host controllers to 3.3V peripheral modulesImportant Notes
If the high-voltage and low-voltage power supplies share a common ground, only one GND connection is required
This module is intended solely for digital signal level shifting and must not be used as a voltage regulator, power converter, or isolation device
Designed only for low-current signal transmission; not suitable for high-power or power-line applicationsCompatible Platforms
Arduino (including Uno, Mega, Nano, and other variants)
ESP32, ESP8266
Raspberry Pi (in scenarios requiring logic level matching)
Other microcontroller systems operating at 3.3V or 5V logic levelsPackage Contents
20 individual 4-channel bidirectional logic level converter modules