Features
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Unique 1-Wire interface requires only one port pin for communication.
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Each device has a unique 64-bit serial code stored in an onboard ROM.
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Multidrop capability simplifies distributed temperature sensing applications.
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Requires no external components.
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Power supply range is 3.0V to 5.5V.
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Measures temperatures from -55°C to +125°C (-67°F to +257°F).
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±0.5°C accuracy from -10°C to +85°C.
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9-bit thermometer resolution.
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Converts temperature in 750ms (max.).
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User-definable nonvolatile (NV) alarm settings.
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Alarm search command identifies and addresses devices whose temperature is outside of programmed limits (temperature alarm condition).
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.
Applications
1-Wire is a registered trademark of Dallas Semiconductor Corporation.
