QuickView - DS1620 Digital Thermometer and Thermostat

Description

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The DS1620 Digital Thermometer and Thermostat provides 9-bit temperature readings which indicate the temperature of the device. With three thermal alarm outputs, the DS1620 can also act as a thermostat. T_HIGH is driven high if the DS1620's temperature is greater than or equal to a user-defined temperature TH. T_LOW is driven high if the DS1620's temperature is less than or equal to a user-defined temperature TL. T_COM is driven high when the temperature exceeds TH and stays high until the temperature falls below that of TL.

User-defined temperature settings are stored in nonvolatile 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 DS1620 over a simple 3-wire interface.

Key Features		Applications/Uses
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 9-Bit Value Converts Temperature to Digital Word in 1 Second (max) Thermostatic Settings are User-Definable and Nonvolatile Data is Read from/Written via a 3-Wire Serial Interface (CLK, DQ, active-low RST) Applications Include Thermostatic Controls, Industrial Systems, Consumer Products, Thermometers, or any Thermally Sensitive System 8-Pin DIP or SO (208-mil) Packages		Consumer Products Industrial Systems Thermally Sensitive Systems Thermometers Thermostatic Controls

Key Specifications: Temperature Sensors

Part Number

Sensor Type

Functions

Interface

Accuracy
(±°C)

Parasite Pwr.

Temp. Thresh.

Temp. Resolution
(bits)

Oper. Temp.
(°C)

Smallest Available Pckg.
(mm²)

Price

max w/pins

See Notes

DS1620

Local

Dual Output Temperature Switch

Dual Temperature Alarms

Standalone Thermostat

Temperature Switch/Temperature Comparator

3-Wire

Logic

0.5

Programmable (NV)

-55 to +125

44.1

$2.89 @1k

See All Temperature Sensors (99)

Key Specifications: Temperature Switches

Part Number

Switch Type

Functions

Interface

Accuracy
(±°C)

Temp. Thresh.
(°C)

Features

Package/Pins

Price

See Notes

DS1620

Local

Dual Output Temperature Switch

Dual Temperature Alarms

Standalone Thermostat

Temperature Switch/Temperature Comparator

3-Wire

Logic

0.5

Factory Programmed

Programmable

High Accuracy

Nonvolatile Thermostatic Settings

Push Pull Active High Output

Separate High and Low Temperature Thresholds

SOIC (W)/8

$2.89 @1k

See All Temperature Switches (25)