Datasheet
DS1921G
Thermochron iButton
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in
the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
42
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© 2012 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
Added bullet “Water resistant or waterproof if placed inside DS9107 iButton capsule (Exceeds Water
Resistant 3 ATM requirements)”
Deleted “application pending” from UL bullet and safety statement
120407
Added text to Detailed Description section: Note that the initial sealing level of DS1921G achieves
IP56. Aging and use conditions can degrade the integrity of the seal over time, so for applications
with significant exposure to liquids, sprays, or other similar environments, it is recommended to
place the Thermochron in the DS9107 i
Button capsule. The DS9107 provides a watertight enclosure
that has been rated to IP68 (See www.maxim-ic.com/AN4126
)
1, 2
4/09 Created newer template-style data sheet All
4/10
Overdrive specifications for t
RSTL
, t
PDL
, and t
W0L
split into range V
PUP
> 4.5V and full range. New
values for the full range
2–4
4/11
Updated UL certificate reference; deleted from the t
W1L
specification in the Electrical Characteristics
table; applied note 13 to the t
W0L
specification in the Electrical Characteristics table; added more
details to Electrical Characteristics table notes 7, 13, and 14
1, 3, 4
9/11
DS1921G-F5N# part number added to the Ordering Information; branding information updated in the
Pin Configuration
1, 41
3/12
Added terminology updates for consistency with similar products; added more details to the Parasite
Power section
1, 7, 8,
9, 14