1 Wire Maxim Dallas IC DS18B20 Temperature Probe 900mm For Fleet Management Devices

The DS18B20 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 DS18B20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. In addition, the DS18B20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply. Each DS18B20 has a unique 64-bit serial code, which allows multiple DS18B20s to function on 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.

- Unique 1-Wire® Interface Requires Only One PortPin for Communication

- Reduce Component Count with IntegratedTemperature Sensor and EEPROM

- Measures Temperatures from -55°C to +125°C(-67°F to +257°F)• ±0.5°C Accuracy from -10°C to +85°C• Programmable Resolution from 9 Bits to 12 Bits• No External Components Required

- Parasitic Power Mode Requires Only 2 Pins forOperation (DQ and GND)

- Simplifies Distributed Temperature-SensingApplications with Multidrop Capability

- Each Device Has a Unique 64-Bit Serial CodeStored in On-Board ROM

- Flexible User-Definable Nonvolatile (NV) Alarm Settingswith Alarm Search Command Identifies Devices withTemperatures Outside Programmed Limits

-Available in 8-Pin SO (150 mils), 8-Pin µSOP, and3-Pin TO-92 Packages

- Thermostatic Controls

- Industrial Systems

- Consumer Products

- Thermometers

- Thermally Sensitive Systems