DS1921H-F5# Maxim Integrated Products, DS1921H-F5# Datasheet - Page 42

• Manufacturer Part Number: DS1921H-F5#
• Description: IBUTTON THERMOCHRON F5
• Manufacturer: Maxim Integrated Products
• Series: iButton®r

Specifications of DS1921H-F5#

• Rohs Information: IButton RoHS Compliance Plan
• Memory Size: 512B
• Memory Type: NVSRAM (Non-Volatile SRAM)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1) Intentional change, longer recovery time between time slots.
10) The I-V characteristic is linear for voltages less than 1V.
11) ε represents the time required for the pull-up circuitry to pull the voltage on IO up from V
12) δ represents the time required for the pull-up circuitry to pull the voltage on IO up from V
13) This number was derived from a test conducted by Cemagref in Antony, France, in July of 2000.
14) The number of temperature conversions (= Samples) possible with the built-in energy source
15) Highlighted numbers are not in compliance with the published iButton standards. See comparison
16) These values are derived from simulation across process, voltage, and temperature and are not
17) Total accuracy is ∆ϑ plus 1/16°C quantization due to the 1/8°C digital resolution of the device.
18) WARNING: Not for use as the sole method of measuring or tracking temperature and/or humidity
Parameter
Name
t
t
t
t
t
SLOT
RSTL
PDH
PDL
W0L
9) Voltage above which, during a rising edge on IO, a logic 1 is detected.
(incl. t
V
input high threshold of the bus master.
http://www.cemagref.fr/English/index.htm
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 device should be stored at a temperature not
exceeding +25°C. Under this condition the shelf life time is 10 years minimum.
table below.
production tested.
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 and/or humidity
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
Dallas Semiconductor/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.
TH
.
REC
)
61µs
480µs
15µs
60µs
60µs
Standard Speed
min
(undef.)
(undef.)
60µs
240µs
120µs
Standard Values
max
7µs
48µs
2µs
8µs
6µs
Overdrive Speed
min
42 of 45
Test Report No. E42
(undef.)
80µs
6µs
24µs
16µs
max
65µs
540µs
15µs
60µs
60µs
Standard Speed
min
1)
DS1921H/Z Values
(undef.)
640µs
60µs
270µs
120µs
max
8µs
48µs
1.1µs
7.5µs
6µs
Overdrive Speed
min
1)
(undef.)
80µs
6µs
24µs
15µs
DS1921H/Z
IL
IL
max
to
to the