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DS1990R - Serial Number IButton

General 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.

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°C to +85°C COMMON iButton.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-4894; Rev 8/09 DS1990R Serial Number iButton www.maxim-ic.com GENERAL 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. 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.