HT1990A
The HT1990A serial number iButton® is a rugged data carrier that serves as an electronic registration number for automatic identification. Data is transferred serially through the 1-Wire® protocol, which requires only a sin- gle data lead and a ground return. Every HT1990A is factory lasered with a guaranteed unique 64-bit regis- tration number that allows for absolute traceability. The durable stainless-steel iButton package is highly resis- tant to environmental hazards such as dirt, moisture, and shock. Its compact coin-shaped profile is self- aligning with mating receptacles, allowing the HT1990A to be used easily by human operators. Accessories enable the HT1990A iButton to be mounted on almost any object, including containers, pallets, and bags.
Unique Factory-Lasered 64-Bit Registration Number Ensures Error-Free Device Selection and
Absolute Traceability Because No Two Parts are Alike
♦ Built-In Multidrop Controller for 1-Wire Net
♦ Digital Identification by Momentary Contact
♦ Data Can Be Accessed While Affixed to Object
♦ Economically Communicates to Bus Master with a Single Digital Signal at 16.3kbps
♦ Button Shape is Self-Aligning with Cup-Shaped Probes
♦ Durable Stainless-Steel Case Engraved with Registration Number Withstands Harsh Environments
♦ Easily Affixed with Self-Stick Adhesive Backing, Latched by its Flange, or Locked with a Ring Pressed Onto its Rim PIN TO PIN DS1990A