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DS18S20 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS18S20 Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 23 page AVAILABLE Functional Diagrams Pin Configurations appear at end of data sheet. Functional Diagrams continued at end of data sheet. UCSP is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. FEATURES Unique 1-Wire® Interface Requires Only One Port Pin for Communication Each Device has a Unique 64-Bit Serial Code Stored in an On-Board ROM Multidrop Capability Simplifies Distributed Temperature Sensing Applications Requires No External Components Can Be Powered from Data Line. 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 Programmed Limits (Temperature Alarm Condition) Applications Include Thermostatic Controls, Industrial Systems, Consumer Products, Thermometers, or Any Thermally Sensitive System PIN CONFIGURATIONS DESCRIPTION The DS18S20 digital thermometer provides 9-bit Celsius 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. In addition, the DS18S20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply. 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. 1-Wire is a registered trademark of Maxim Integrated Products, Inc. TO-92 (DS18S20) 1 (BOTTOM VIEW) 2 3 MAXIM DS1820 1 2 3 SO (150 mils) (DS18S20Z) N.C. N.C. N.C. N.C. GND DQ VDD N.C. 6 8 7 5 3 1 2 4 19-5474; Rev 8/10 DS18S20 High-Precision 1-Wire Digital Thermometer |
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