• One Wire products
  • DS2404 EconoRAM Time Chip with RTC, 512 bytes RAM
  • 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 C & R Monetary 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
  • 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 (168 Bytes) NV RAM F5
  • DS1992 Memory iButton 1024 Bits (128 Bytes) NV RAM F5
  • DS1993 Memory iButton 4096 Bits (512 Bytes) NV RAM F5
  • DS1994 Memory iButton + Time 4096 Bits (512 Bytes) NV RAM F5
  • DS1995 Memory iButton 16,384 Bits (2K Bytes) NV RAM F5
  • DS1996 Memory iButton 65,536 Bits (8K Bytes) NV RAM
  • DS1820 1-wire digital thermometer
    • PIC 16f84 code to read the temp and display it on an LCD

• Gary W. Tompkins says: I have finally found the cause of the problems I was having with the Dallas DS18S20. Turns out several shipments of parts with the date code 0014B5 were miss-marked. The silicon inside the package is actually that of the DS18B20!!!

The iButton interface.

See also:

• http://www.redsword.com/tjacobs/geeb/ibuttons.htm
• http://kitsrus.com/kits.html Peter Crowcroft's DIY Electronics K75 PIC Trainer uses a DS1620. You can download the source for it
• http://www.phanderson.com/PIC/16C84/crc.html Dallas 1820 1-wire digital thermometer

See:

Questions: