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020106

FEATURES

Requires no external components

Supply voltage range covers from 2.7V to

5.5V

Measures temperatures from –5

5°C to

+12

5°C in 0.5°C increments. Fahrenheit

equivalent is –6

7°F to +257°F in 0.9°F

increments

Temperature is read as a 9–bit value

Converts temperature to digital word in 1

second (max)

Thermostatic settings are user–definable and

non–volatile

Data is read from/written via a 3–wire serial

Applications include thermostatic controls,

industrial systems, consumer products,

thermometers, or any thermally sensitive

system

8–pin SOIC (208 mil) package

PIN ASSIGNMENT

PIN DESCRIPTION

DQ

– 3–Wire Input/Output

– 3–Wire Clock Input and

Stand–alone

Convert Input

RST

– 3–Wire Reset Input

GND

– Ground

– High Temperature Trigger

– Low Temperature Trigger

– High/Low Combination Trigger

– Power Supply Voltage (3V-5V)

DESCRIPTION

The DS1720 Digital Thermometer and Thermostat provides 9–bit temperature readings which indicate

the temperature of the device. With three thermal alarm out-puts, the DS1720 can also act as a thermostat.

that of TL.

User–defined temperature settings are stored in non–volatile memory, so parts can be programmed prior

to insertion in a system, as well as used in stand–alone applications without a CPU. Temperature settings

and temperature readings are all communicated to/from the DS1720 over a simple 3–wire interface.

DS1720

ECON-Digital Thermometer and

Thermostat

www.maxim-ic.com

DS1720S 8-Pin SOIC (208-mil)

1

2

3

4

8

7

6

5

DQ

CLK/CONV

RST

GND