iButton

Maxim's iButton® devices are small, durably packaged modules with globally unique digital addresses. Enhanced by Maxim's 1-Wire communications protocol, they provide the ability to deliver or record data where other products cannot, such as in very harsh environments. An iButton device is ideal for any application where information needs to follow a person or object, such as temperature and humidity data logging, access control, asset tracking, and electronic cash (eCash) transactions. Learn more about iButton Devices

iButton Products By Application

iButton Design Resources

Also see:
NFC/RFID Products

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Resources


DS1964S
DeepCover Secure Authenticator iButton with SHA-256

  • Symmetric-Key-Based Bidirectional Secure Authentication Model Based on SHA-256
  • Strong Authentication with a High-Bit-Count User-Programmable Secret and Input Challenge
  • 512 Bits of User EEPROM Partitioned Into Two Pages of 256 Bits