Overview

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 microcontroller. 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 microcontroller to control multiple 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.

Features

• Operating temperature range of -55°C to +125°C.
• Accurate to ±0.5°C over the range of -10°C to +85°C.
• Provides 9-bit Celsius temperature measurements.
• 1-Wire bus allows for only two (using parasite power) or three connections.
• Unique 64-bit serial code allowing multiple DS1820s on same 1-Wire bus.
• Ideal for use with any microcontroller - requires just one digital I/O line.
• TO-92 package.
• Plugs into socket fitted to most MikroElektronika development boards.