(China (Mainland))
Product Summary
The DS1990R-F5 Serial Number iButton is a rugged data carrier that acts as an electronic registration number for automatic identification. The DS1990A consists of a factory-lasered, 64-bit ROM that includes an unique 48-bit serial number, an 8-bit CRC and an 8-bit Family Code (01h). Data is transferred serially via the 1-Wire protocol which requires only a single data lead and a ground return. The DS1990R-F5 is fully compatible with the DS1990R-F5 Serial Number iButton but provides the additional 1-Wire protocol capability that allows the Search ROM command to be interpreted by the DS1990R-F5 and therefore allows multiple DS1990R-F5 devices to reside on a single data line.
Parametrics
Absolute maximum ratings: (1)Voltage on any Pin Relative to Ground: -0.5V to +7.0V; (2)Operating Temperature: -40℃ to +85℃; (3)Storage Temperature: -55℃ to +125℃.
Features
Features: (1)Upgrade of DS1990 allows multiple Serial Number iButtons to reside on a common bus; (2)Unique 48–bit serial number; (3)Low-cost electronic key for access control; (4)8-bit CRC for checking data integrity; (5)Can be read in less than 5 ms; (6)Operating temperature range of -40℃ to +85℃.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
Quantity | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 DS1990R-F5 |
Maxim Integrated Products |
Serial Number Registration |
Data Sheet |
Negotiable |
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DS1990R-F5# |
Maxim Integrated Products |
Serial Number Registration Serial Number iButton |
Data Sheet |
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DS1990R-F5+W |
Maxim Integrated Products |
Serial Number Registration |
Data Sheet |
Negotiable |
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