DS1922T-F5# Maxim Integrated Products, DS1922T-F5# Datasheet - Page 4

• Manufacturer Part Number: DS1922T-F5#
• Description: IBUTTON TEMP LOGGER
• Manufacturer: Maxim Integrated Products
• Series: iButton®r

Specifications of DS1922T-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

Temperature Logger iButton with 8KB
Data-Log Memory
ELECTRICAL CHARACTERISTICS (continued)
(V
Note 8:
Note 9:
Note 10: The I-V characteristic is linear for voltages less than 1V.
Note 11: The earliest recognition of a negative edge is possible at t
Note 12: Numbers in bold are not in compliance with the published iButton standards. See the Comparison Table .
Note 13: Interval during the negative edge on IO at the beginning of a presence-detect pulse between the time at which the voltage
Note 14: ε in Figure 13 represents the time required for the pullup circuitry to pull the voltage on IO up from V
Note 15: δ in Figure 13 represents the time required for the pullup circuitry to pull the voltage on IO up from V
Note 16: To conserve battery power, use 8-bit temperature logging whenever possible.
Note 17: This number was derived from a test conducted by Cemagref in Antony, France, in July 2000:
Note 18: Includes +0.1/-0.2°C calibration chamber measurement uncertainty.
Note 19: Warning: Not for use as the sole method of measuring or tracking temperature in products and articles that could affect
Note 20: Assumes using calibration memory with calibration equations for error compensation. Includes +0.1/-0.2°C calibration
COMPARISON TABLE
iButton CAN PHYSICAL SPECIFICATION
* Intentional change; longer recovery time requirement due to modified 1-Wire front-end.
Note: Numbers in bold are not in compliance with the published iButton standards.
4
t
t
t
t
t
SIZE
WEIGHT
SAFETY
SLOT
RSTL
PDH
PDL
W0L
PUP
_______________________________________________________________________________________
PARAMETER
= +3.0V to +5.25V.)
(including t
Voltage above which, during a rising edge on IO, a logic 1 is detected.
After V
is 90% of V
threshold of the bus master.
www.cemagref.fr/English/index.htm Test Report No. E42.
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.
chamber measurement uncertainty. Guaranteed by design.
TH
REC
See the Package Information section.
Ca. 3.3 grams
Meets UL 913 (4th Edit.); Intrinsically Safe Apparatus, approval under Entity Concept for use in Class I,
Division 1, Group A, B, C, and D Locations.
is crossed during a rising edge on IO, the voltage on IO must drop by V
PUP
)
and the time at which the voltage is 10% of V
STANDARD SPEED
MIN
480
61
15
60
60
(μs)
(undefined)
(undefined)
LEGACY VALUES
MAX
240
120
60
OVERDRIVE SPEED
MIN
48
7
2
8
6
(μs)
(undefined)
REH
MAX
80
24
16
PUP
6
after V
.
TH
STANDARD SPEED
has been previously reached.
MIN
690
65
15
60
60
*
(μs)
DS1922L/DS1922T VALUES
HY
(undefined)
to be detected as logic 0.
MAX
63.5
720
287
120
OVERDRIVE SPEED
IL
IL
MIN
9.5
7.5
70
to V
to the input-high
2
7
TH
(μs)
.
(undefined)
MAX
80
28
12
7