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DS1921H Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1921H Datasheet(HTML) 1 Page - Dallas Semiconductor |
1 / 45 page DS1921H/Z High-Resolution Thermochron iButton Range H: +15°C to +46°C; Z: -5°C to +26°C www.maxim-ic.com SPECIAL FEATURES Digital thermometer measures temperature in 1/8°C increments with ±1°C accuracy Built-in real-time clock (RTC) and timer has accuracy of ±2 minutes per month from 0°C to 45°C Water resistant or waterproof if placed inside DS9107 iButton ® capsule (Exceeds Water Resistant 3 ATM requirements) Automatically wakes up and measures temperature at user-programmable intervals from 1 to 255 minutes Logs up to 2048 consecutive temperature measurements in protected nonvolatile (NV) random access memory Records a long-term temperature histogram with 1/2°C resolution Programmable temperature-high and temperature-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 random access memory Communicates to host with a single digital signal at 15.4kbits or 125kbits per second using 1-Wire ® protocol Fixed range: H: +15 °C to +46°C; Z: -5 °C to +26°C 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 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 Designed to meet UL#913 (4th Edit.). Intrinsically Safe Apparatus: under Entity Concept for use in Class I, Division 1, Group A, B, C, and D Locations, contact Dallas Semiconductor for certification schedule F5 MICROCAN IO GND 0.51 5.89 16.25 17.35 D6 21 3B2000FBC52B 1-Wire ® ® ® Thermochron® All dimensions are shown in millimeters. ORDERING INFORMATION DS1921H-F5 +15 °C to +46°C F5 iButton DS1921Z-F5 -5 °C to +26°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 of 45 120407 1-Wire, Microcan, and iButton are registered trademarks of Dallas Semiconductor Corp, a wholly owned subsidiary of Maxim Integrated Products, Inc. |
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