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DS1621：Digital Thermometer and Thermostat

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.

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

DS1621: Functional Block Diagram Applications/Uses Medical Networking Personal Computing Routers/Switches Test Measurement Systems Wireless Base Stations

DataSheet

Parametrics

Quality and Environmental Data

• DS1621.pdf

Related Products

• DS1631：High-Precision Digital Thermometer and Thermostat
• DS1721：Digital Thermometer and Thermostat

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