Magnetic RW1990 iButton with Steel Ring

Magnetic RW1990 iButton with Steel Ring

Magnetic RW1990 iButton with Steel Ring

Place of Origin: China(Mainland)                   Part Number: MR1990-DG            Brand Name: CC
Min. Order Quantity: 100 Pieces                     Port: Guangzhou                             Payment Terms: T/T, Western Union, Paypal


Magnetic RW1990 iButton with Steel Ring


RW1990 is a rewritable iButton intended for copying the keys of the Dallas DS1990A-F5 family (TM1990A-F5). The most common blank for copying electronic keys (tablets) from door phones. It is an electronic rewritable medium of 64-bit identification code. After copying is a complete copy of the original Dallas key with the filter protection installed. Solves the problem of incomplete compatibility of the key RW2004 (TM2004). Data exchange is done via the 1-Wire Protocol. The information is transmitted over a single conductor (data bus – single-wire). The data transfer rate is sufficient to ensure data transfer at the time of contact with the contact device.

All blanks are made to strict standards. Each RW1990 consists of an electronic chip enclosed in a steel sealed cylindrical body. The body of the RW1990 key is made of polished stainless steel. Operating temperature range from -40 ° C to + 85 ° C, the key is not affected by magnetic and static fields, industrial atmosphere; Guaranteed to maintain the strength of the case for 10 years with 1 million contacts with the reader. Its compact form in the form of a coin provides self-alignment in the connector, which ensures ease of use.

Supported duplicators: CC1001S-G, CC1002H.


Key Features

  • Copy iButon for Magnetic DS1990A, Magnetic TM1990A;
  • Rewriting an enormous number of times;
  • Replace traditional keys (with the factory code);
  • Replace disposable workpiece;
  • Manufactured on the basis of high-quality and durable magnetic media;
  • The devices are compact and light in weight;
  • Can be used in any working position;
  • Average service life 10 years;
  • The eyelet holder is made of plastic;
  • Work at any temperature;
  • Instant reading: Transmit the code instantly to the reader;
  • Overwriting: support code change;
  • Working with door phones: Any system that support 1-Wire Protocol;
  • Instant reading: Transmit the code instantly to the reader.


Technical Characteristics


TM(Touch Memory) iButton

Identification code



More than 10 years

Dimensions(L / W)

 59/19 mm

Weight of the key (± 3%)

8 grams(with plastic fob)

Average number of readings

1000000 times

Code Overwrite


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℃



  • Driver Identification for GPS tracking devices
  • Door intercommunication systems
  • Security systems
  • Access control systems
  • Automated engineering systems (control)
  • Fire alarms
  • Working time recording systems


Compatible Readers/Probes:


Please refer to below links for iButton copying instructions:

Copy iButton’s 64-Bit Serial Number from DS1990A/TM1990 to RW1990


 Please Note: This so-called ‘Magnetic iButton’  does not have magnetism itself since it consists of an iButton, a steel ring and a plastic holder. It should work with a magnetic reader which has magnets inside.