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DS1921G Datasheet(PDF) 4 Page - Maxim Integrated Products

Part # DS1921G
Description  Thermochron iButton
Download  42 Pages
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS1921G Datasheet(HTML) 4 Page - Maxim Integrated Products

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Note 17: WARNING: Not for use as the sole method of measuring or tracking temperature in products and articles that could affect
the health or safety of persons, plants, animals, or other living organisms, including but not limited to foods, beverages,
pharmaceuticals, medications, blood and blood products, organs, flammable, and combustible products. User shall
assure that redundant (or other primary) methods of testing and determining the handling methods, quality, and fitness of
the articles and products should be implemented. Temperature tracking with this product, where the health or safety of the
aforementioned persons or things could be adversely affected, is only recommended when supplemental or redundant
information sources are used. Data-logger products are 100% tested and calibrated at time of manufacture by Maxim to
ensure that they meet all data sheet parameters, including temperature accuracy. User shall be responsible for proper use
and storage of this product. As with any sensor-based product, user shall also be responsible for occasionally rechecking
the temperature accuracy of the product to ensure it is still operating properly.
Note 18: The number of temperature conversions (= samples) possible with the built-in energy source depends on the operating and
storage temperature of the device. When not in use for a mission, the RTC oscillator should be turned off and the device
should be stored at a temperature not exceeding +25°C. Under this condition the shelf life time is 10 years minimum.
Thermochron iButton
4
_______________________________________________________________________________________
COMPARISON TABLE
LEGACY VALUES
DS1921G VALUES
STANDARD SPEED (µs)
OVERDRIVE SPEED (µs)
STANDARD SPEED (µs)
OVERDRIVE SPEED (µs)
PARAMETER
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
tSLOT (including
tREC)
61
(undefined)
7
(undefined)
65*
(undefined)
8*
(undefined)
tRSTL
480
(undefined)
48
80
540
640
58
80
tPDH
15
60
2
6
15
60
1.1
6
tPDL
60
240
8
24
60
270
7.5
32
tW0L
60
120
6
16
60
120
8.5
15
iButton CAN PHYSICAL SPECIFICATION
SIZE
See the Package Information section.
WEIGHT
Ca. 3.3g
SAFETY
Meets UL 913, 5th Ed., Rev. 1997-02-24; Intrinsically Safe Apparatus, approval under Entity Concept for use in
Class I, Division 1, Group A, B, C, and D Locations.
*
Intentional change; longer recovery time between time slots.
Note: Numbers in bold are not in compliance with the published iButton standards.
ELECTRICAL CHARACTERISTICS (continued)
(VPUP = +2.8V to +5.25V, TA = -40°C to +85°C.)


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