Dallas Semiconductor Corporation

Automatic Information
iButton Products Selection Table

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Note: All iButtonTM products described below have a 64-bit ROM Registration Number and are 1-Wire® Network-compatible products. Related technical information, including Automatic Information application notes, technical briefs and articles, standards, and related articles, is also available.

Device Description Memory Packages
DS1920 Temperature iButton 16 Bits EEPROM F5
DS1921 Thermochron iButton 16,384 Bits temperature log + 1024 bits histogram + 768 bits alarm time stamps & duration + 4096 bits general-purpose NV RAM F5
DS1954 Crypto iButton Secure coprocessor with 6 Kbyte RAM and 32 Kbyte ROM F5
DS1963L Monetary iButton 4096 Bits NV RAM with Write Cycle Counters F5
DS1963S SHA iButton 4096 Bits NV RAM with Write Cycle Counters + 512 bits Secrets + SHA-1 engine F5
DS1971 EEPROM iButton 256+64 Bits EEPROM F3, F5
DS1973 EEPROM iButton 4096 Bits EEPROM F3, F5
DS1982 Add-only iButton 1024 Bits EPROM F3, F5
DS1982U UniqueWare iButton 1024 Bits EEPROM F3, F5
DS1985 Add-only iButton 16,384 Bits EPROM F3, F5
DS1985U UniqueWare iButton 16,384 Bits EPROM F3, F5
DS1986 Add-only iButton 65,536 Bits EPROM F3, F5
DS1986U UniqueWare iButton 65,536 Bits EPROM F3, F5
DS1990A Serial Number iButton not applicable F3, F5
DS1991 Multikey iButton 1344 Bits NV RAM F5
DS1992 Memory iButton 1024 Bits NV RAM F5
DS1993 Memory iButton 4096 Bits NV RAM F5
DS1994 Memory iButton + Time 4096 Bits NV RAM F5
DS1995 Memory iButton 16,384 Bits NV RAM F5
DS1996 Memory iButton 65,536 Bits NV RAM F5
iButton is a trademark of Dallas Semiconductor Corp.
Updated 2000/03/02
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