PCA9515BDGKR datasheet by Texas Instruments

PCA9515BDGKR Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9515BDGKR can support?
  The PCA9515BDGKR can support I2C bus frequencies up to 400 kHz, but it's recommended to limit the frequency to 100 kHz for reliable operation.
• How do I configure the PCA9515BDGKR for bidirectional voltage translation?
  To configure the PCA9515BDGKR for bidirectional voltage translation, connect the VCC pin to the higher voltage supply, and the VCC2 pin to the lower voltage supply. Then, connect the SCL/SDA pins to the corresponding I2C bus signals.
• What is the maximum voltage difference that PCA9515BDGKR can handle?
  The PCA9515BDGKR can handle a maximum voltage difference of 5.5V between the VCC and VCC2 pins.
• Can I use PCA9515BDGKR for level shifting between 1.8V and 3.3V?
  Yes, the PCA9515BDGKR can be used for level shifting between 1.8V and 3.3V. However, ensure that the input voltage on the VCC pin is at least 1.2V higher than the input voltage on the VCC2 pin.
• How do I ensure that the PCA9515BDGKR operates in a hot-swappable environment?
  To ensure hot-swappability, add a 1kΩ pull-up resistor on the SCL and SDA lines, and use a 10nF capacitor on the VCC pin to filter out noise. Additionally, ensure that the power supply to the PCA9515BDGKR is stable and well-regulated.