 The DS1990R 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 single
data lead and a ground return. Every DS1990R is factory lasered with a
guaranteed unique 64-bit registration number that allows for absolute
traceability. The durable stainless-steel iButton package is highly resistant to
environmental hazards such as dirt, moisture, and shock. Its compact coin-shaped
profile is self-aligning with mating receptacles, allowing the DS1990R to be
used easily by human operators. Accessories permit the DS1990R iButton to be
mounted on almost any object, including containers, pallets, and bags. The
DS1990R is a fully compatible variant of the DS1990A. In applications where a
presence pulse on contact is critical the DS1990R should be preferred over the
DS1990A.
Special Features
- Upgrade of DS1990A Guarantees Presence Pulse on Contact
- Can be Read in Less Than 5ms
- Operating Range: 2.8V to 6.0V, -40°C to +85°C
Key Features
- Supports both 33h and 0Fh Read-ROM Commands for Legacy Systems
- Unique Factory-Lasered 64-Bit Registration Number Assures 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
- Presence Detector Acknowledges when Reader First Applies Voltage
- Meets UL#913 (4th Edit.); Intrinsically Safe Apparatus: Approved Under
Entity Concept for use in Class I, Division 1, Group A, B, C, and D
Locations
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