DS18S20 - 1-WIRE DIGITAL THERMOMETER 

DS18S20 - 1-Wire Digital Thermometer

Product Code: DS18S20 Price: Check Latest The DS18S20 digital thermometer provides 9-bit centigrade temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18S20 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. Each DS18S20 has a unique 64-bit serial code, which allows multiple DS18S20s to function on the same 1-Wire bus; thus, it is simple to use one microprocessor to control many DS18S20s 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. Key Features Unique 1-Wire interface requires only one port pin for communication. Each device has a unique 64-bit serial code stored in an onboard ROM. Multidrop capability simplifies distributed temperature sensing applications. Requires no external components. Power supply range is 3.0V to 5.5V. Measures temperatures from -55°C to +125°C (-67°F to +257°F). ±0.5°C accuracy from -10°C to +85°C. 9-bit thermometer resolution. Converts temperature in 750ms (max.). User-definable nonvolatile (NV) alarm settings. Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition). Applications Thermostatic controls Industrial systems Consumer products Thermometers Any thermally sensitive system. Part Number Accuracy (±°C) Supply Voltage Range (V) Optimal Range (°C) Temp. Thresh. (°C) Meas. Res. (Bits) Package DS18B20 0.5 3.0 to 5.5 -55 to +125 1, Prog. NV 9 - 12 3-Pin TO-92 DS18S20 0.5 3.0 to 5.5 -55 to +125 1, Prog. NV 9 3-Pin TO-92