iButton Temperature Loggers
with 8KB Datalog Memory
DS1922L/DS1922T
General Description
• .ꢀ2 Bytes of General-Purpose Memory Plus
64 Bytes of Calibration Memory
• Two-Level Password Protection of All Memory and
Configuration Registers
• Individually Calibrated in a NIST-Traceable
Chamber
• Complies to Standard ENꢀ283±
®
The iButton temperature loggers (DS1922L/DS1922T)
are rugged, self-sufficient systems that measure tempera-
ture and record the result in a protected memory section.
The recording is done at a user-defined rate. A total of
8192 8-bit readings or 4096 16-bit readings, taken at
equidistant intervals ranging from 1s to 273hr, can be
stored. Additionally, 512 bytes of SRAM store application-
specific information and 64 bytes store calibration data. A
mission to collect data can be programmed to begin
immediately, after a user-defined delay, or after a tempera-
ture alarm. Access to the memory and control functions
can be password protected. The DS1922L/DS1922T are
configured and communicate with a host-computing
• Rugged Construction Survives Harsh Environments
• Water Resistant Enclosure (IP.6) or Waterproof if
Placed Inside DS9ꢀ±ꢁ iButton Capsule (Exceeds
Water Resistant 3 ATM Requirements)
• CE, FCC, and UL9ꢀ3 Certifications
• Simple Serial Port Interfaces to Most Microcontrollers
®
for Rapid Data Transfer
device through the serial 1-Wire protocol, which requires
• Communicates to Host with a Single Digital Signal
Up to ꢀ.04kbps at Standard Speed or Up to
ꢀ2.kbps in Overdrive Mode Using ꢀ-Wire Protocol
• Quick Access to Alarmed Devices Through ꢀ-Wire
Conditional Search Function
only a single data lead and a ground return. Each
DS1922L/DS1922T is factory lasered with a guaranteed
unique 64-bit registration number that allows for absolute
traceability. The durable stainless-steel package is highly
resistant to environmental hazards such as dirt, moisture,
and shock. Accessories permit the DS1922L/DS1922T to
be mounted on almost any object, including containers,
pallets, and bags.
Ordering Information
PART
TEMP RANGE
-40°C to +85°C
0°C to +125°C
PIN-PACKAGE
F5 Can
Applications
DS1922L-F5#
DS1922T-F5#
High-Temperature Logging (Process Monitoring,
Industrial Temperature Monitoring)
F5 Can
#Denotes a RoHS-compliant device that may include lead(Pb)
that is exempt under the RoHS requirements.
Temperature Logging in Cold Chain, Food Safety, Bio
Science, and Pharmaceutical and Medical Products
Benefits and Features
Examples of Accessories
• High Accuracy, Full-Featured Digital Temperature
Logger Simplifies Temperature Data Collection and
Dissemination of Electronic Temperature Record
• Temperature Accuracy of ±±0.5C from -ꢀ±5C to
+6.5C (DSꢀ922L), ±±0.5C from +2±5C to +ꢁ.5C
(DSꢀ922T), with Software Corrections
PART
ACCESSORY
Self-Stick Adhesive Pad
Multipurpose Clip
Mounting Lock Ring
Snap-in FOB
DS9096P
DS9101
DS9093RA
DS9093A
DS9092
• Measures Temperature with 8-Bit (±0.5C) or ꢀꢀ-Bit
(±0±62.5C) Resolution
• Operating Temperature Range: DSꢀ922L: -4±5C to
+8.5C; DSꢀ922T: ±5C to +ꢀ2.5C
• Automatically Wakes Up, Measures Temperature,
and Stores Values in 8kB of Data-Log Memory in
8- or ꢀ6-Bit Format
• Sampling Rate from ꢀs Up to 2ꢁ3hr
• Programmable High and Low Trip Points for
Temperature Alarms
• Programmable Recording Start Delay After Elapsed
Time or Upon a Temperature Alarm Trip Point
iButton Probe
Common iButton Device Features and Pin Configuration
appear at end of data sheet.
iButton and 1-Wire are registered trademarks of Maxim
Integrated Products, Inc.
19-4990; Rev 13; 3/15