What are iButtons?

iButtons are small integrated circuits, embedded in a rugged stainless steel case. The name iButton originates in its similarity to button cell batteries. iButtons are available in different types, amongst others with the function as a data logger or as a universal memory.

DS1925L-F5# Temperature Logger - buy iButtons online at

Key Features Digital thermometer measures temperature 1/8°C increments with ±1°C accuracy. Built-in real-time clock (RTC) and timer has accuracy of ±2

DS1921Z-F5# - Thermochron iButton -5°C thru +26°C

iButton disassembly // Professor Steven J. Murdoch

Readable and Writable Dallas iButton RW1990 Tag - China RFID Card

Hands-on with the Thermochron iButton Starter Kit

The Maxim iButton temperature logger is a self-contained, self-powered, and field-rugged package that measures just over 0.5 inches in diameter.

Maxim iButton Temperature Loggers

iButton internals –

What are iButtons?

Plastic fobs for iButton® devices allow you to hang your iButtons® on hooks, carry them on key chains, easily hold them to insert into readers, and

DS9093AB+ iButton Fob - Blue

Accessory Type:iButton Key Ring Mount Fob; For Use With:Analog Devices F5 MicroCan iButtons; Product Range:-; MSL:- RoHS Compliant: Yes

iButton Accessories, Key Ring Mount, For Use with Analog Devices F5 MicroCan iButtons

Can I Copy The DS1990A-F5/F3 iButtons?