General Description
The DS1977 is a 32Kbyte EEPROM in a rugged, iButton enclosure. Access to the memory can be password-protected with different passwords for read-only and full access. Data is transferred serially via the 1-Wire protocol, which requires only a single data lead and a ground return. Every DS1977 is factory lasered with a guaranteed unique 64-bit registration number that allows for absolute trace-ability. The durable stainless steel iButton package is highly resistant to environmental hazards such as dirt and shock. Accessories permit the DS1977 iButton to be mounted on almost any object, including containers, pallets and bags.
   
Features
• 32KB EEPROM memory
• Durable, stainless-steel iButton package
• Built-in multi-drop controller ensures
    compatibility with other Dallas Semiconductor
    1-Wire net products
• Unique factory lasered 64-bit registration
    number assures error free device selection
    and absolute part identity
• Supports Overdrive mode
• Operating range: 2.8V to 5.25V, -40 to +85°C
   
Applications
• Maintenance and Inspection of equipment
• Medical Information / Health
• Data Shuttle for Fleet Management and Vending
    applications