MultiKey Chip

Please check latest availability status for a specific part variant.


The DS1205S MultiKey Chip is an enhanced version of the DS1204U Electronic Key which has both a standard 3-wire interface (data, clock, and reset) and a 1-Wire® interface. The DS1205S MultiKey has three secure read/write subkeys which are each 384 bits in length. In addition, there is a 512-bit read/write scratchpad which can be used as a non-secure data area or as a holding register for data transfer to one of the three subkeys. Each subkey within the part is uniquely addressable on byte boundaries.

Key Features

  • Three secure read/write data partitions of 384 bits each
  • One non-secure read/write data partition of 512 bits
  • Secure data cannot be deciphered by reverse engineering
  • Guaranteed unique, 48-bit, laser etched serial number
  • 64-bit password and I.D. fields provide positive identification and security for each secure data partition
  • Maximum data transfer rate of 2 million bits/second
  • Low-power CMOS circuitry
  • Access via 3-wire or 1-Wire interface


  • Financial Transactions
  • Proprietary Data
  • Secure Personnel Areas
  • Systems Access Control

Quality and Environmental Data

Request Reliability Report for: DS1205S 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


Related Resources

Belle Isle 2020
05/29/2020 - 05/31/2020, Detroit, MI
2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.