Maxim DS1990A-F3+, iButton Serial Number for DS1990A

Can Be Read in Less Than 5msOperating Range: 2.8V to 6.0V, -40°C to +85°C Common iButton FeaturesUnique Factory-Lasered 64-Bit Registration Number Ensures Error-Free Device Selection and Absolute Traceability Because No Two Parts are AlikeBuilt-In Multidrop Controller for 1-Wire NetDigital Identification by Momentary ContactData Can Be Accessed While Affixed to ObjectEconomically Communicates to Bus Master with a Single Digital Signal at 16.3kbpsButton Shape is Self-Aligning with Cup-Shaped ProbesDurable Stainless-Steel Case Engraved with Registration Number Withstands Harsh EnvironmentsEasily Affixed with Self-Stick Adhesive Backing, Latched by its Flange, or Locked with a Ring Pressed Onto its Rim Applications/UsesAccess ControlInventory ControlTool ManagementWork-in-Progress Tracking