DS2401+T&R datasheet by Maxim Integrated Products

DS2401+T&R Frequently Asked Questions (FAQs)

• What is the maximum number of DS2401 devices that can be connected to a single 1-Wire bus?
  Theoretically, up to 256 devices can be connected to a single 1-Wire bus, but in practice, the number is limited by the bus capacitance and the signal quality.
• How do I ensure reliable communication with the DS2401 over long cables?
  Use a twisted pair cable, keep the cable length as short as possible, and add a 1 kΩ pull-up resistor to the DQ pin to improve signal integrity.
• What is the purpose of the VPP pin, and how should it be connected?
  The VPP pin is used for programming the device. It should be connected to a 12V programming voltage or left unconnected if not used.
• Can I use the DS2401 with a 3.3V power supply?
  Yes, the DS2401 can operate with a 3.3V power supply, but the VPP pin should be connected to a 12V programming voltage if programming is required.
• How do I handle the CRC error detection in the DS2401?
  The DS2401 calculates a 16-bit CRC for each data byte. The host should verify the CRC and retry the transaction if an error is detected.