DS1621

Digital Thermometer and Thermostat

 Overview   Design Resources   Ordering Info   Related Products   All   

Status Explanations for product status codes

Part Number Status
DS1621 Active: In Production. See Ordering Information for details.

Description

The DS1621 Digital Thermometer and Thermostat provides 9-bit temperature readings, which indicate the temperature of the device. The thermal alarm output, TOUT is active when the temperature of the device exceeds a user-defined temperature TH. The output remains active until the temperature drops below user defined temperature TL, allowing for any hysteresis necessary. User-defined temperature settings are stored in nonvolatile memory so parts may be programmed prior to insertion in a system. Temperature settings and temperature readings are all communicated to/from the DS1621 over a simple 2-wire serial interface.

Data Sheet

Download this datasheet in PDF formatDownload Rev 3 (PDF, 248kB)
Send this datasheet to any email addressEmail

My Maxim: Not Logged In
By logging in to My Maxim you can subscribe to alerts for this data sheet.

Login | Register

Key Features

  • Temperature measurements require no external components
  • Measures temperatures from -55°C to +125°C in 0.5°C increments. Fahrenheit equivalent is -67°F to 257°F in 0.9°F increments
  • Temperature is read as a 9-bit value (2-byte transfer)
  • Wide power supply range (2.7V to 5.5V)
  • Converts temperature to digital word in less than 1 second
  • Thermostatic settings are user definable and nonvolatile
  • Data is read from/written via a 2-wire serial interface (open drain I/O lines)
  • Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermal sensitive system
  • 8-pin DIP or SO package (150mil and 208mil)
 

Applications/Uses

  • Medical
  • Networking
  • Personal Computing
  • Routers/Switches
  • Test Measurement Systems
  • Wireless Base Stations
   

Key Specifications:

Temperature Sensors
Part Number Sensor Type Functions Interface Accuracy
(±°C)
Parasite Pwr. Temp. Thresh. Temp. Resolution
(bits)
Multi Droppable Oper. Temp.
(°C)
Budgetary
Price
See Notes
DS1621  Local Single Temperature Alarm 2-Wire/I2C/SMBus 0.5 No Programmable (NV)
9
10
11
12
Yes -55 to +125 $2.13 @1k
See All Temperature Sensors (111)

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.



Diagram

DS1621: Functional Block Diagram
Functional Block Diagram

More Information

Temperature Family by Product Type

Didn't Find What You Need?

Information Index

Overview

 

Design Resources

 

Ordering Info

 

Related Products

 
Description
Key Features
Applications/Uses
Key Specifications
Diagram
Notes and Comments
  Data Sheet
Technical Documents
Evaluation Kits
Reliability Reports
Software/Models
  Price and Availability
Samples
Buy Online
Package Information
Lead-Free Information
  Similar Products by Function
Similar Products by Application
Evaluation Kits
Products with Similar Part Numbers
Products Used With This
 
Rev 3; 2005-09-15
This page last modified: 2009-10-23