DS1720

• Requires no external components
• Supply voltage range covers from 2.7V to 5.5V
• Measures temperatures from 55°C to +125°C in 0.5°C increments. Fahrenheit equivalent is 67°F to +257°F    in 0.9°F increments
• Temperature is read as a 9bit value
• Converts temperature to digital word in 1 second (max)
• Thermostatic settings are userdefinable and non volatile
• Data is read from/written via a 3wire serial interface (CLK, DQ, RST)
• Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally    sensitive system
• 8pin SOIC (208 mil) package

The DS1720 Digital Thermometer and Thermostat provides 9bit temperature readings which indicate the temperature of the device. With three thermal alarm outputs, the DS1720 can also act as a thermostat. THIGH is driven high if the DS1720's temperature is greater than or equal to a userdefined temperature TH. TLOW is driven high if the DS1720's temperature is less than or equal to a userdefined temperature TL. T_COM is driven high when the temperature exceeds TH and stays high until the temperature falls below that of TL.

Userdefined temperature settings are stored in non volatile memory, so parts can be programmed prior to insertion in a system, as well as used in standalone applications without a CPU. Temperature settings and temperature readings are all communicated to/from the DS1720 over a simple 3wire interface.