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Digital Thermometer and Thermostat

Product Details

Key Features

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 2-Wire/I2C/SMBus
Functions Single Temperature Alarm
Accuracy (±°C) 0.5
Parasite Pwr. No
Temp. Thresh. Programmable (NV)
Temp. Resolution (bits) 9
10
11
12
Oper. Temp. (°C) -55 to +125
Package/Pins PDIP/8
SOIC (N)/8
SOIC (W)/8
Budgetary
Price (See Notes)
2.37
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Simplified Block Diagram

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Parameters

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 2-Wire/I2C/SMBus
Functions Single Temperature Alarm
Accuracy (±°C) 0.5
Parasite Pwr. No
Temp. Thresh. Programmable (NV)
Temp. Resolution (bits) 9
10
11
12
Oper. Temp. (°C) -55 to +125
Package/Pins PDIP/8
SOIC (N)/8
SOIC (W)/8
Budgetary
Price (See Notes)
2.37

Key Features

  • Simply Adds Temperature Monitoring and Control to Any System
    • 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)
    • Converts Temperature to Digital Word in Less than 1s
    • Thermostatic Settings are User Definable And Nonvolatile
  • Can Be Used in a Wide Variety of Applications
    • Power Supply Range (2.7V to 5.5V)
    • Data is Read From/Written Via a 2-Wire Serial Interface (Open Drain I/O Lines)
  • Saves Space
    • Temperature Measurements Require No External Components
    • 8-pin DIP or SO package (208-mil) Packages

Applications/Uses

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

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.

Simplified Block Diagram

DS1621: Functional Block Diagram DS1621: Functional Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .