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 PCA9306DP1 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 SCL and SDA lines, and place them as close to the PCA9306DP1 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, PCA9306DP1 can be used for bidirectional voltage translation. It can translate signals from a low-voltage side (e.g., 1.8 V) to a high-voltage side (e.g., 3.3 V) and vice versa. However, ensure that the voltage levels on both sides are within the recommended operating range specified in the datasheet.
To handle hot-swapping or insertion/removal of devices on the I2C bus, use a voltage supervisor or a power-on reset circuit to ensure that the PCA9306DP1 is properly initialized and configured before the I2C bus is activated. Additionally, consider using a bus buffer or repeater to isolate the bus segments and prevent backpowering or voltage conflicts.
To minimize noise and signal degradation, follow these layout and routing guidelines: keep the PCA9306DP1 close to the I2C bus lines, use a ground plane or shield to reduce electromagnetic interference, and route the SCL and SDA lines as differential pairs with a controlled impedance. Avoid routing the I2C bus lines near high-frequency or high-current signals.
PCA9306DP1 datasheet
by NXP Semiconductors
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