PCA9517DGKR datasheet by Texas Instruments

PCA9517DGKR Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9517DGKR can support?
  The PCA9517DGKR can support I2C bus frequencies up to 400 kHz, but it's recommended to operate at 100 kHz or lower for reliable operation.
• How do I configure the PCA9517DGKR for bidirectional voltage translation?
  To configure the PCA9517DGKR for bidirectional voltage translation, connect VCC to the higher voltage supply, and VL to the lower voltage supply. Then, connect the I2C bus signals (SCL and SDA) to the corresponding pins on the PCA9517DGKR.
• What is the maximum voltage difference that the PCA9517DGKR can handle?
  The PCA9517DGKR can handle a maximum voltage difference of 5.5 V between VCC and VL.
• Can I use the PCA9517DGKR for level shifting between 1.8 V and 3.3 V?
  Yes, the PCA9517DGKR can be used for level shifting between 1.8 V and 3.3 V. However, ensure that the input voltage on the VL pin is within the recommended operating range of 1.65 V to 5.5 V.
• How do I ensure that the PCA9517DGKR operates reliably in a noisy environment?
  To ensure reliable operation in a noisy environment, use a decoupling capacitor (e.g., 0.1 μF) between VCC and GND, and another between VL and GND. Additionally, use a series resistor (e.g., 1 kΩ) on the SCL and SDA lines to reduce noise susceptibility.