Special Features
•Real-time clock/calendar in binary format
•Uses the same binary time/daterepresentation as the DS1994 but with1 second resolution
•Clock accuracy is better than ±2 minutes permonth at +25°C
•Operating temperature range from -40°C to+85°C
•Over 10 years of operation

Common iButton Features
•Unique, factory-lasered and tested 64-bitregistration number (8-bit family code +48-bit serial number + 8-bit CRC tester)assures absolute traceability because no twoparts are alike
•Multidrop controller for MicroLAN
•Digital identification and information bymomentary contact
•Chip-based data carrier compactly storesinformation
•Data can be accessed while affixed to object
•Economically communicates to host with asingle digital signal at 16.3kbps
•Standard 16mm diameter and 1-Wire®protocol ensure compatibility with iButton®device family
•Button shape is self-aligning with cup-shapedprobes
•Durable stainless steel case engraved withregistration number withstands harshenvironments
•Easily affixed with self-stick adhesive backing,latched by its flange, or locked with a ringpressed onto its rim
•Presence detector acknowledges whenreader first applies voltage