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DS1921H Datasheet(PDF) 1 Page - Dallas Semiconductor

Part # DS1921H
Description  High-Resolution Thermochron iButton
Download  45 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1921H Datasheet(HTML) 1 Page - Dallas Semiconductor

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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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