DS2430AP datasheet by Maxim Integrated Products

DS2430AP Frequently Asked Questions (FAQs)

• What is the maximum number of DS2430AP devices that can be connected to a single 1-Wire bus?
  Up to 256 devices can be connected to a single 1-Wire bus, but the maximum number of devices that can be practically connected depends on the bus capacitance, wire length, and noise environment.
• How do I ensure reliable communication with the DS2430AP over long distances?
  To ensure reliable communication over long distances, use a twisted pair or shielded cable, keep the bus capacitance low, and use a 1-Wire bus repeater if necessary. Also, ensure that the 1-Wire bus voltage is within the recommended range.
• What is the purpose of the VPP pin on the DS2430AP?
  The VPP (Programming Voltage) pin is used to program the device's EPROM memory. It is not necessary for normal operation and can be left unconnected if programming is not required.
• How do I implement a 1-Wire bus reset?
  A 1-Wire bus reset can be implemented by pulling the 1-Wire bus low for a minimum of 480 μs. This resets all devices on the bus and prepares them for a new ROM function command.
• What is the difference between the DS2430AP and the DS2430A?
  The DS2430AP is a 1-kbit EPROM version, while the DS2430A is a 1-kbit EEPROM version. The main difference is that the EPROM version requires a programming voltage (VPP) to write data, whereas the EEPROM version can be written using a standard 1-Wire write protocol.