DS1990R Description
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.
DS1990R Key Features
- Upgrade of DS1990A Guarantees Presence Pulse on Contact Can be Read in Less Than 5ms Operating Range: 2.8V to 6.0V, -40°
- Unique Factory-Lasered 64-Bit Registration Number Assures Error-Free Device Selection and Absolute Traceability Because