DS1920

Temperature iButton


Please check latest availability status for a specific part variant.

Description

The iButton® temperature logger (DS1920) provides direct-to-digital 9-bit temperature readings over a range of -55°C to +100°C in 0.5° increments. The iButton communicates with a processor using the 1-Wire® protocol through a hardware port interface. The port interface provides both the physical link and handles the communication protocols that enable the processor to access iButton resources with simple commands. Two bytes of EEPROM can be used either to set alarm triggers or for storing user data.

Armored in the DS1920, the thermometer can measure temperatures in demanding environments. Like every other iButton device, the DS1920 has a unique serial number. The 1-Wire interface reduces data output, address, and power to one line. A unique serial number allows multiple 1920s to share the same bus, with many sensors placed at different sites reporting to a single port on a processor. Multidropped DS1920s make the lowest-power temperature sensing network available inside buildings, equipment, or machinery and in process monitoring and control. With appropriate accessories the DS1920 easily attaches to an object or circuit board.
  Enlarge+

Key Features

  • Digital Thermometer Measures Temperatures from -55°C to +100°C in Typically 0.2s
  • Zero Standby Power
  • 0.5°C Resolution, Digital Temperature Reading is Two's Complement of °C Value
  • Access to Internal Counters Allows Increased Resolution Through Interpolation
  • Reduces control, Address, Data, and Power to a Single Data Contact
  • 8-Bit Device-Generated CRC for Data Integrity
  • 8-Bit Family Code Specifies DS1920 Communications Requirements to Reader
  • Special Command Set Allows User to Skip ROM Section and Perform Temperature Measurements Simultaneously for All Devices on the Bus
  • 2 Bytes of EEPROM to Be Used Either as Alarm Triggers or User Memory
  • Alarm Search Directly Indicates Which Device Senses Alarming Temperatures
Part NumberTechnologyApplicationsMemory TypeMemory SizeProg. AlarmUnique WareReal Time ClockBudgetary
Price
See Notes
DS1920 iButtonAsset ManagementEEPROM16 bitsTemperature High/LowNoNo$4.40 @1k
See All iButton Products (17)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

 
Status:
Package:
Temperature:

Related Resources


Belle Isle 2020
05/29/2020 - 05/31/2020, Detroit, MI
2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.

RSVP