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DS1921H-F5 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1921H-F5 Datasheet(HTML) 1 Page - Dallas Semiconductor |
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1 / 40 page  1 of 40 121003 DS1921L-F5X Thermochron iButton www.maxim-ic.com SPECIAL FEATURES* § Digital thermometer measures temperature in 0.5°C increments (accuracy ±1.0 °C) § Built-in real-time clock (RTC) and timer has accuracy of ±2 minutes per month from 0°C to 45°C § Automatically wakes up and measures tem- perature at user-programmable intervals from 1 to 255 minutes § Logs up to 2048 consecutive temperature measurements in protected nonvolatile (NV) memory § Records a long-term temperature histogram with 2.0°C resolution § Programmable temperature-high and tem- perature-low alarm trip points § Records up to 24 time stamps and durations when temperature leaves the range specified by the trip points § 512 bytes of general-purpose read/write NV memory § Typical lifetime more than 9 years § Communicates to host with a single digital signal at 14.1kbits or 125kbits per second using 1-Wire® protocol COMMON iButton FEATURES § Digital identification and information by momentary contact § Unique, factory-lasered and tested 64-bit reg- istration number (8-bit family code + 48-bit serial number + 8-bit CRC tester) assures ab- solute traceability because no two parts are alike § Multidrop controller for 1-Wire net § Chip-based data carrier compactly stores information § Data can be accessed while affixed to object § Button shape is self-aligning with cup-shaped probes § Durable stainless steel case engraved with registration number withstands harsh envi- ronments § Easily affixed with self-stick adhesive back- ing, 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) F5 MICROCAN IO GND 0.36 0.51 5.89 © 1993 YYWW REGISTERED RR xx 21 15C000FBC52B 16.25 17.35 All dimensions are shown in millimeters. ORDERING INFORMATION DS1921L-F51 -10 °C to +85°C F5 iButton® DS1921L-F52 -20 °C to +85°C F5 iButton DS1921L-F53 -30 °C to +85°C F5 iButton DS1921L-F50 -40 °C to +85°C F5 iButton EXAMPLES OF ACCESSORIES DS9096P Self-Stick Adhesive Pad DS9101 Multi-Purpose Clip DS9093RA Mounting Lock Ring DS9093A Snap-In Fob DS9092 iButton Probe 1-Wire, Microcan, and iButton are registered trademarks of Dallas Semiconductor *See ELECTRICAL CHARACTERISTICS table for details. |
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