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DS1991

Dallas Semiconductor
Part Number DS1991
Manufacturer Dallas Semiconductor
Description MultiKey iButton
Published Jul 5, 2008
Detailed Description DS1991 MultiKey iButtonTM www.dalsemi.com SPECIAL FEATURES 1,152-bit secure read/write, nonvolatile memory § Secure mem...
Datasheet PDF File DS1991 PDF File

DS1991
DS1991

Overview
DS1991 MultiKey iButtonTM www.
dalsemi.
com SPECIAL FEATURES 1,152-bit secure read/write, nonvolatile memory § Secure memory cannot be deciphered www.
DataSheet4U.
com without matching 64-bit password § Memory is partitioned into 3 blocks of 384 bits each § 64-bit password and ID fields for each memory block § 512-bit scratchpad ensures data transfer integrity § Operating temperature range: -40°C to +70°C § Over 10 years of data retention § § § § 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 F5 MICROCANTM 5.
89 0.
36 0.
51 c 1993 COMMON iButton FEATURES § Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48bit 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.
3k bits per second Standard 16 mm diameter and 1-Wire protocol ensure compatibility with iButton family Button shape is self-aligning with cupshaped probes Durable stainless steel case engraved with registration number withstands harsh environments 16.
25 YYWW REGISTERED RR 21 02 17.
35 000000FBC52B § § § § § § § § DATA GROUND All dimensions shown in millimeters ORDERING INFORMATION DS1991L-F5 DS9096P DS9101 DS9093RA DS9093F DS9092 F5 MicroCan Self-Stick Adhesive Pad Multi-Purpose Clip Mounting Lock Ring Snap-In Fob iButton Probe EXAMPLES OF ACCESSORIES 1 of 14 082099 DS1991 iButton DESCRIPTION The DS1991 MultiKey iButton is a rugged read/write data carrier that acts as three separate ...


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