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`Maxim › Products › Digital › Memory Products
`
`› DS1996
`
`DS1996
`iButton 64Kb Memory
`
`Data Sheet
`
`Subscribe
`
`Active: In Production.
`
`OVERVIEW
`
`KEY SPECS
`
`DESIGN RESOURCES
`
`ORDER
`
`Enlarge+
`
`Description
`The iButton 64Kb memory (DS1996) is a
`®
`rugged read/write data carrier that acts as a
`localized database that can be easily accessed
`with minimal hardware. The nonvolatile
`memory offers a simple solution to storing and
`retrieving vital information pertaining to the
`object to which the iButton device is attached.
`Data is transferred serially via the 1-Wire
`®
`protocol which requires only a single data lead
`and a ground return. The scratchpad is an
`additional page that acts as a buffer when
`writing to memory. Data is first written to the
`scratchpad where it can be read back. After
`the data has been verified, a copy scratchpad
`command will transfer the data to memory.
`This process ensures data integrity when
`modifying the memory. A 48-bit serial number
`is factory lasered into each DS1996 to provide
`a guaranteed unique identity which allows for
`absolute traceability. The durable MicroCan
`package is highly resistant to environmental
`hazards such as dirt, moisture, and shock. Its
`compact button-shaped profile is self-aligning
`with mating receptacles, allowing the DS1996
`to be easily used by human operators.
`Accessories permit the DS1996 to be mounted
`on almost any surface including plastic key
`fobs, photo-ID badges and printed circuit
`boards. Applications include access control,
`work-in-progress tracking, electronic travelers,
`storage of calibration constants, and debit
`tokens.
`
`Key Features
`
`https://www.maximintegrated.com/en/products/digital/memory-products/DS1996.html
`
`12/8/2015
`
`Ex. 2037-0001
`
`
`
`DS1996 iButton 64Kb Memory - Maxim
`
`Page 2 of 2
`
`• 65,536 bits of read/write nonvolatile
`memory
`• Overdrive mode boosts communication
`speed to 142 kbits per second
`• 256-bit scratchpad ensures integrity of
`data transfer
`• Memory partitioned into 256-bit pages for
`packetizing data
`• Data integrity assured with strict
`read/write protocols
`• Operating temperature range from -40°C
`to +70°C
`• Over 10 years of data retention
`
`© 2015 Maxim Integrated | Contact us | Careers | Legal | Privacy | Cookie Policy | Site Map
`
`https://www.maximintegrated.com/en/products/digital/memory-products/DS1996.html
`
`12/8/2015
`
`Ex. 2037-0002
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