PCA9509D,118 datasheet by NXP Semiconductors

PCA9509D,118 Frequently Asked Questions (FAQs)

• What is the maximum frequency of the I2C bus that PCA9509D,118 can support?
  The PCA9509D,118 can support I2C bus frequencies up to 400 kHz.
• How many devices can be connected to the PCA9509D,118 I2C bus?
  The PCA9509D,118 can support up to 112 devices on the I2C bus, assuming a 7-bit address space.
• What is the maximum cable length for the PCA9509D,118 I2C bus?
  The maximum cable length for the PCA9509D,118 I2C bus depends on the capacitance of the bus and the frequency of operation. As a general guideline, the maximum cable length is around 10-20 meters at 100 kHz and 1-2 meters at 400 kHz.
• Does the PCA9509D,118 support hot-swapping of devices on the I2C bus?
  Yes, the PCA9509D,118 supports hot-swapping of devices on the I2C bus, but it requires proper circuit design and device implementation to ensure reliable operation.
• What is the power consumption of the PCA9509D,118?
  The power consumption of the PCA9509D,118 depends on the operating frequency and the load on the I2C bus. Typically, the power consumption is around 1-2 mA at 100 kHz and 5-10 mA at 400 kHz.