PCA9548ABSHP datasheet by NXP Semiconductors

PCA9548ABSHP Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9548 can support?
  The PCA9548 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 PCA9548 to work in 8-bit or 16-bit mode?
  The PCA9548 is configured to work in 8-bit or 16-bit mode by setting the A0 and A1 address pins. For 8-bit mode, A0 and A1 should be connected to GND, and for 16-bit mode, A0 should be connected to VCC and A1 to GND.
• What is the maximum capacitance that the PCA9548 can drive on the I2C bus?
  The PCA9548 can drive up to 400 pF of capacitance on the I2C bus, but it's recommended to limit the capacitance to 200 pF for reliable operation.
• How do I reset the PCA9548?
  The PCA9548 can be reset by pulling the RESET pin low for at least 1 ms. This will reset the device to its default state.
• What is the power-on reset behavior of the PCA9548?
  The PCA9548 has a power-on reset feature that resets the device to its default state when the power supply voltage rises above 1.2 V.