DS1921L-F5X Datasheet, PDF (1/40 Pages) Dallas Semiconductor – Thermochron iButton

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DS1921L-F5X
Thermochron iButton
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
§ 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
5.89
0.36
0.51
© 1993
YYWW REGISTERED RR
xx
21
15C000FBC52B
16.25
17.35
IO
GND
All dimensions are shown in millimeters.
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
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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