Dual bidirectional I2C-bus and SMBus voltage-level translator - Application: Voltage Translation ; Function: Open Drain Voltage Translation ; Number of bits: 2 ; Operating temperature: -40~85 Cel; Voltage Translation Range: 1.0 to 5.0 ~ 1.0 to 5.0 V
The maximum frequency of operation for PCA9306D is 400 kHz, as specified in the datasheet. However, it's recommended to operate at a frequency below 300 kHz to ensure reliable operation and minimize power consumption.
To ensure proper termination of the I2C bus, use a pull-up resistor on the SDA and SCL lines, and place them as close to the PCA9306D as possible. The recommended value for the pull-up resistor is between 1 kΩ and 10 kΩ, depending on the bus capacitance and operating frequency.
Yes, PCA9306D is a voltage-level translator, which means it can translate signals between 3.3V and 5V devices on the same I2C bus. However, ensure that the voltage levels on the SDA and SCL lines are within the specified range for each device, and use proper termination and pull-up resistors to ensure reliable operation.
To handle hot-swapping or insertion/removal of devices on the I2C bus, use a bus buffer or a switch with built-in bus hold functionality, such as the PCA9517A. This will help maintain the bus state and prevent data corruption or bus lockup during device insertion or removal.
The maximum cable length supported by PCA9306D depends on the operating frequency, cable capacitance, and signal quality. As a general guideline, the maximum cable length is around 10 meters at 100 kHz and 1 meter at 400 kHz. However, it's recommended to perform signal integrity analysis and testing to determine the maximum cable length for a specific application.
PCA9306D datasheet
by NXP Semiconductors
