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DS1921G Datasheet

  • DS1921G

  • Thermochron iButton

  • 44頁(yè)

  • ETC

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DS1921G
Thermochron iButton
www.maxim-ic.com
SPECIAL FEATURES
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Digital thermometer measures temperature in
0.5擄C increments
Accuracy 鹵1擄C from -30擄C to +70擄C. See EC
table for accuracy specification
Built-in real-time clock (RTC) and timer has
accuracy of
鹵2
minutes per month per month
from 0擄C to 45擄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)
random access memory
Records a long-term temperature histogram
with 2.0擄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
廬
protocol
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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 I, Division 1, Group A, B, C
and D Locations (application pending)
F5 MICROCAN
5.89
0.51
芒
16.25
000000FBC52B
Thermochron
廬
89
芒
21
17.35
1-Wire
芒
COMMON iButton FEATURES
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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
IO
GND
All dimensions are shown in millimeters.
ORDERING INFORMATION
DS1921G-F5
-40擄C to +85擄C
F5 iButton
EXAMPLES OF ACCESSORIES
DS9096P
DS9101
DS9093RA
DS9093A
DS9092
Self-Stick Adhesive Pad
Multi-Purpose Clip
Mounting Lock Ring
Snap-In Fob
iButton Probe
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1-Wire, Microcan, and iButton are registered trademarks of Dallas Semiconductor
1 of 44
121003

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