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-Wireprotocol, 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. If required inserted into a Plastic FOB, please refer to YSL90Rxxx for Non-Magnetic Key or YSL90RMAGxxx for Magnetic Key where xxx directs to a Colour choice. APPLICATIONS Access Control Work-In-Progress Tracking Tool Management Inventory Control 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 COMMON iButton FEATURES 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
