iButton with unchangeable 64 bit serial number

The iButton with unique and unchangeable 64 bit serial number is ideal for identification purposes


The serial number iButton DS1990 is a robust data carrier that can be used as a digital registration number, e.g. for automated identification of objects or persons. Data is transferred via the 1-wire protocol and a two-wire bus.

iButtons have a guaranteed unique and unchangeable 64-bit serial number. The housing is made of stainless steel and protects against dirt, moisture and vibration.

The iButton is pre-assembled with a holder (FOB) DG9093


  • Driver Identification
  • Time and presence control
  • Access systems

Technical Data

  • Maxim (Dallas) DS1990
  • Integrated multidrop controller for 1-Wire networks
  • Serial number stamped in the housing
  • 1Wire Protocol
  • Unique and unchangeable 64-bit serial number
  • Digital identification with short contact
  • Read access in less than 5ms
  • Operating range: 2.8V to 6.0V, -40°C to +85°C