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DS1990 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1990 Datasheet(HTML) 1 Page - Dallas Semiconductor |
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1 / 10 page  1 of 10 081999 DS1990A SPECIAL FEATURES § Upgrade of DS1990 allows multiple Serial Number iButtons to reside on a common bus § Unique 48–bit serial number § Low-cost electronic key for access control § 8-bit CRC for checking data integrity § Can be read in less than 5 ms § Operating temperature range of -40 °C to +85 °C 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 by momentary contact § Chip-based data carrier compactly stores information § Data can be accessed while affixed to an object § Economically communicates to bus master with a single digital signal at 16.3k bits per second § Standard 16 mm diameter and 1-WireTM 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 § Meets UL#913 (4th Edit.); Intrinsically Safe Apparatus, Approved under Entity Concept for use in Class 1, Division 1, Group A, B, C and D locations F3 MICROCAN TM F5 MICROCAN TM All dimensions shown in millimeters ORDERING INFORMATION DS1990A-F3 F3 MicroCan DS1990A-F5 F5 MicroCan EXAMPLES OF ACCESSORIES DS9096P Self-Stick Adhesive Pad DS9101 Multi-Purpose Clip DS9093RA Mounting Lock Ring DS9093F Snap-In Fob DS9092 iButton Probe DS1990A Serial Number iButton TM www.dalsemi.com DATA GROUND 0.36 0.51 3.10 c 1993 YYWW REGISTERED RR 66 01 000000FBC52B 16.25 17.35 DATA GROUND 0.36 0.51 5.89 c 1993 YYWW REGISTERED RR E6 01 000000FBD8B3 16.25 17.35 |
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