The DS1973-F3 is a 4Kb Add-Only iButton from Dallas Semiconductor (now Maxim Integrated). It's a rugged, button-shaped data carrier that utilizes the 1-Wire protocol for communication. This iButton is designed to store permanent identification and information, making it suitable for a wide range of applications, including asset tracking, access control, and electronic registration.

Applications:

• Asset tracking and management
• Access control systems
• Electronic registration and identification
• Inventory management
• Medical device tracking
• Tool tracking and management

Features:

• 4Kb of add-only EEPROM memory
• Unique factory-lasered 64-bit registration number
• Built-in multidrop controller for 1-Wire net
• Button-shaped package for self-alignment with mating receptacle
• Durable stainless steel case with hermetic seal
• Operating temperature range: -40°C to +85°C

Benefits:

• Permanent identification: The unique 64-bit registration number ensures that each iButton is uniquely identifiable.
• Rugged and durable: The stainless steel case and hermetic seal protect the iButton from harsh environments.
• Easy to use: The button-shaped package allows for easy attachment and removal.
• Low cost: Provides a cost-effective solution for asset tracking and identification.
• Simple interface: The 1-Wire protocol simplifies integration into existing systems.

Additional Details:

The DS1973-F3 iButton communicates using the single-contact 1-Wire protocol, requiring only one data pin and a ground connection for communication. The 4Kb of EEPROM memory can be written to, but only bits can be changed from a '1' to a '0'. It can be read repeatedly. The unique 64-bit registration number is laser-etched during manufacturing, guaranteeing a unique identifier for each device. The durable stainless steel case protects the internal circuitry from moisture, dust, and other environmental hazards. Specific details about communication timing and memory organization can be found in the manufacturer's datasheet.