PCA9546APW,112 datasheet by NXP Semiconductors

PCA9546APW,112 Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that the PCA9546APW,112 can support?
  The PCA9546APW,112 can support I2C bus frequencies up to 400 kHz, but it's recommended to limit it to 100 kHz for reliable operation.
• Can I use the PCA9546APW,112 as a level shifter for I2C signals?
  Yes, the PCA9546APW,112 can be used as a level shifter for I2C signals, but it's not recommended as it's primarily designed as a bus switch. For level shifting, it's better to use a dedicated level shifter IC.
• How do I ensure that the PCA9546APW,112 switches correctly between the two I2C buses?
  To ensure correct switching, make sure to use the EN (enable) pin to control the switch, and use the SCL (clock) and SDA (data) pins to connect to the I2C buses. Also, ensure that the voltage levels of the two buses are compatible.
• What is the maximum current that the PCA9546APW,112 can handle?
  The PCA9546APW,112 can handle a maximum current of 10 mA per channel, but it's recommended to limit it to 5 mA for reliable operation.
• Can I use the PCA9546APW,112 to switch between more than two I2C buses?
  No, the PCA9546APW,112 is designed to switch between only two I2C buses. If you need to switch between more than two buses, you'll need to use multiple PCA9546APW,112 devices or a different IC.