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DS1985 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS1985 Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 26 page  1 of 26 SPECIAL FEATURES 16384 bits Electrically Programmable Read Only Memory (EPROM) communicates with the economy of one signal plus ground EPROM partitioned into 64 256-bit pages for randomly accessing packetized data records Each memory page can be permanently write protected to prevent tampering Device is an “add only” memory where additional data can be programmed into EPROM without disturbing existing data Architecture allows software to patch data by superseding an old page in favor of a newly programmed page Reduces control, address, data, power, and programming signals to a single data pin 8-bit family code specifies DS1985 communications requirements to reader Reads over a wide voltage range of 2.8V to 6.0V from -40°C to +85°C; programs at 11.5V to 12.0V from -40°C to +85°C F3 MicroCan F5 MicroCan COMMON iButton FEATURES 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 bus master with a single digital signal at 16.3kbps Standard 16mm diameter and 1-Wire® protocol ensure compatibility with iButton® 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 ORDERING INFORMATION PART PIN-PACKAGE DS1985-F3+ F3 MicroCan DS1985-F5+ F5 MicroCan +Denotes a lead(Pb)-free/RoHS-compliant package . EXAMPLES OF ACCESSORIES DS9096P Self-Stick Adhesive Pad DS9101 Multi-Purpose Clip DS9093RA Mounting Lock Ring DS9093F Snap-In Fob DS9092 iButton Probe iButton and 1-Wire are registered trademarks of Maxim Integrated Products, Inc. 19-4892; Rev 8/09 DS1985 16Kb Add-Only iButton |
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