DS1990R Datasheet (Maxim Integrated Products)

DS1990R, Serial Number IButton

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 gu

DS1990R 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