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User-Definable Nonvolatile (NV) Alarm

Settings

Alarm Search Command Identifies and Addresses Devices Whose Temperature is Outside Programmed Limits

Available in 8-Pin SO (150 mils), 8-Pin µSOP,and 3-Pin TO-92 Packages

Applications Include Thermostatic Controls,Industrial Systems, Consumer Products,Thermometers, or Any Thermally Sensitive

System

2 Byte User-Programmable EEPROM

ESD Rating: HBM8000V, MM800V

Product Detail

The QT18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points.

The QT18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of -55°C to +125°C and is accurate to ±0.5°C over the range of -10°C to +85°C. In addition, the QT18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply.

Each QT18B20 has a unique 64-bit serial code,which allows multiple QT18B20s to function on QT18B20 Programmable Resolution ,1-Wire Digital Thermometer,User-Definable Nonvolatile (NV) Alarm

Settings

Alarm Search Command Identifies and Addresses Devices Whose Temperature is Outside Programmed Limits Available in 8-Pin SO (150 mils), 8-Pin µSOP, and 3-Pin TO-92 Packages

APPlications Include Thermostatic Controls,Industrial Systems, Consumer Products,Thermometers, or Any Thermally Sensitive

System

2 Byte User-Programmable EEPROM

ESD Rating: HBM8000V, MM800V

PIN CONFIGURATIONS

the same 1-Wire bus. Thus, it is simple to use one microprocessor to control many DS18B20s distributed over a large area. Applications that can benefit from this feature include HVAC environmental controls, temperature monitoring systems inside buildings, equipment, or machinery, and process monitoring and control systems.