iButton Products Selection Table
Note: All iButton® 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 | |