DS18S20 Datasheet – Digital Thermometer

Part Number: DS18S20

Function: High-Precision 1-Wire Digital Thermometer

Package: 8-Pin SO (150 mils) and 3-Pin TO-92

Manufacturer: Dallas, Maxim


DS18S20 Thermometer


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. In addition, the DS18S20 can derive power directly from the data line (“parasite power”), eliminating the need for an external power supply



DS18S20 datasheet pdf


0. Unique 1-Wire Interface Requires Only One Port Pin for Communication
1. Parasite Power Mode Requires Only 2 Pins for Operation (DQ and GND)
2. Simplifies Distributed Temperature-Sensing Applications with Multidrop Capability
(1) Each Device Has a Unique 64-Bit Serial Code Stored in On-Board ROM
3. Flexible User-Definable Nonvolatile (NV) Alarm Settings with Alarm Search Command Identifies Devices with Temperatures Outside Programmed Limits


1. Thermostatic Controls
2. Industrial Systems
3. Consumer Products
4. Thermometers
5. Thermally Sensitive Systems

DS18S20 Datasheet

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