RW1990 Writable Tags for iButton TM Dallas Maxim 1-Wire DS1990A-F5

SKU: SF6020

Including Tax

iButton RW1990 Key Tag

RW1990 is an easy to use rewritable iButton intended for copying the keys of the Dallas DS1990A-F5 family (TM1990A-F5). It is a blank card writable with a 64-bit identification code. Following a 1-Wire Protocol, transmission of information is being done through a single conductor, ensuring a successful data transfer with the contact device.

RW1990 key is made of stainless steel with a high resistance to any magnetic and static fields. It is primarily used for Door Intercommunication Systems, Security Systems and Access Control Systems.


  • Format: TM(Touch Memory) iButton
  • Identification code: 64-bit
  • Lifetime: More than 10 years
  • Dimensions(L / W): 59/19 mm
  • Weight of the key (± 3%): 4g (with plastic fob)
  • Average number of readings: 1000000 times
  • Code Overwrite: rewritable
  • Door Phones: any with the DALLAS format
  • Colors of the holder: Main black, any color on request
  • Material of Cover and Holder: Cover- Stainless steel; Holder – ABS/POM
  • Operating Temperature: -40℃ to +85℃

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