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DS1921G
Thermochron iButton Device
General Description
The Thermochron ? iButton ? device (DS1921G) is a
rugged, self-sufficient system that measures temperature
and records the result in a protected memory section.
The recording is done at a user-defined rate, both as a
direct storage of temperature values as well as in the
form of a histogram. Up to 2048 temperature values
taken at equidistant intervals ranging from 1 to 255min
can be stored. The histogram provides 63 data bins with
a resolution of 2.0°C. If the temperature leaves a user-
programmable range, the DS1921G also records when
this happened, for how long the temperature stayed out-
side the permitted range, and if the temperature was too
high or too low. An additional 512 bytes of battery-
backed SRAM allow storing information pertaining to the
object to which the DS1921G is associated. Data is
transferred serially through the 1-Wire ? protocol, which
requires only a single data lead and a ground return.
Every DS1921G is factory lasered with a guaranteed
unique, electrically readable, 64-bit registration number
that allows for absolute traceability. The durable stainless
steel package is highly resistant to environmental haz-
ards such as dirt, moisture, and shock. Accessories per-
mit the DS1921G to be mounted on almost any object
including containers, pallets, and bags.
Applications
Temperature Logging in Cold Chain, Food Safety,
Pharmaceutical, and Medical Products
Ordering Information
PART TEMP RANGE PIN-PACKAGE
Features
o Digital Thermometer Measures Temperature in
0.5°C Increments
o Accuracy ±1°C from -30°C to +70°C (See the
Electrical Characteristics for Accuracy
Specification)
o Built-In Real-Time Clock (RTC) and Timer Has
Accuracy of ±2 Minutes per Month from 0°C to +45°C
o Water Resistant or Waterproof if Placed Inside
DS9107 iButton Capsule (Exceeds Water
Resistant 3 ATM Requirements)
o Automatically Wakes Up and Measures Temperature
at User-Programmable Intervals from 1 Minute to
255 Minutes
o Logs Consecutive Temperature Measurements in
2KB of Data-Log Memory
o Records a Long-Term Temperature Histogram
with 2.0°C Resolution
o Programmable Temperature High and
Temperature Low Alarm Trip Points
o Records Up to 24 Timestamps and Durations
When Temperature Leaves the Range Specified
by the Trip Points
o 512 Bytes of General-Purpose Battery-Backed SRAM
o Communicates to Host with a Single Digital Signal
at 15.4kbps or 125kbps Using 1-Wire Protocol
Common iButton Device Features
o Digital Identification and Information by
Momentary Contact
o Unique, Factory-Lasered, and Tested 64-Bit
Registration Number (8-Bit Family Code + 48-Bit
DS1921G-F5#
DS1921G-F5N#
-40°C to +85°C
-40°C to +85°C
F5 Can
F5 Can
Serial Number + 8-Bit CRC Tester) Assures
Absolute Traceability Because No Two Parts are
Alike
#Denotes a RoHS-compliant device that may include lead(Pb)
that is exempt under the RoHS requirements.
A NIST traceability certificate is available for the DS1921G-F5N.
See Application Note 4629 for details.
Examples of Accessories
o Multidrop Controller for 1-Wire Net
o Chip-Based Data Carrier Compactly Stores Information
o Data Can Be Accessed While Affixed to Object
o Button Shape is Self-Aligning with Cup-Shaped
Probes
PART
DS9096P
DS9101
DS9093RA
DS9093A
DS9092
ACCESSORY
Self-Stick Adhesive Pad
Multipurpose Clip
Mounting Lock Ring
Snap-In Fob
iButton Probe
o Durable Stainless-Steel Case Engraved with
Registration Number Withstands Harsh
Environments
o Easily Affixed with Self-Stick Adhesive Backing,
Latched by Its Flange, or Locked with a Ring
Pressed Onto Its Rim
o Presence Detector Acknowledges When Reader
First Applies Voltage
Pin Configuration appears at end of data sheet.
Thermochron, iButton, and 1-Wire are registered trademarks of
Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
19-5101; Rev 8; 11/13
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相关代理商/技术参数
DS1921G-F5#W
功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A0C
功能描述:iButton
RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A12
功能描述:iButton
RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A12-W
功能描述:iButton
RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A14
功能描述:iButton
RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A15
功能描述:iButton
RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A17
功能描述:iButton
RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A1B
功能描述:iButton
RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated