DS1904 Datasheet

Real-time clock/calendar in binary format
Uses the same binary time/date representation as the DS1994 but with 1 second resolution
Clock accuracy is better than ą 2 minutes per month at +25°C
Operating temperature range from -40°C to +70°C
Over 10 years of operation
Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number + 8-bit CRC tester) assures absolute traceability because no two parts are alike
Multidrop controller for MicroLAN
Digital identification and information by momentary contact
Chip-based data carrier compactly stores information
Data can be accessed while affixed to object
Economically communicates to host with a single digital signal at 16.3kbits per second
Standard 16mm diameter and 1-Wire protocol ensure compatibility with iButton device family
Button shape is self-aligning with cup-shaped probes
Durable stainless steel case engraved with registration number withstands harsh environments
Easily affixed with self-stick adhesive backing, latched by its flange, or locked with a ring pressed onto its rim
Presence detector acknowledges when reader first applies voltage
Meets UL#913 (4th Edit.); Intrinsically Safe Apparatus, approved under Entity Concept for use in Class I, Division 1, Group A, B, C and D locations (application pending)

DS1904