DS1821

更新时间： 2024-01-29 14:27:05

品牌	Logo	应用领域
达拉斯 - DALLAS		/
页数	文件大小	规格书
16页	572K
描述
Programmable Digital Thermostat

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数据手册

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DS1821 数据手册

DS1821

Programmable Digital Thermostat

www.dalsemi.com

FEATURES

ꢀ Requires no external components

PIN ASSIGNMENT

ꢀ Measures temperatures from -55°C to +125°C

in 1°C increments. Fahrenheit equivalent is -

67°F to +257°F in 1.8°F increments DS1821

ꢀ Converts temperature to digital word in 1

second (max.)

ꢀ Thermostatic settings are user definable and

nonvolatile

ꢀ Available in 3-pin PR35, TO-220, and 8-pin

SOIC packages

DS1821

PR35 PACKAGE

See Mech. Drawing

Section

ꢀ Applications include thermostatic controls,

industrial systems, consumer products,

thermometers, or any thermally sensitive

system

DS1821T

TO-220 PACKAGE

See Mech. Drawing

Section

GND

V_DD

DNC

DS1821S 8-Pin SOIC (208-mil)

See Mech Drawings Section

PIN DESCRIPTION

GND

- Ground

- Data In/Out

V_DD

- Power Supply Voltage +5V

- No Connect

DNC

- Do Not Connect

DESCRIPTION

The DS1821 Programmable Digital Thermostat provides a thermal alarm logic output when the

temperature of the device exceeds a user-defined temperature TH. The output remains active until the

temperature drops below user defined temperature TL, allowing for any hysteresis necessary.

User-defined temperature settings are stored in nonvolatile memory, so parts can be programmed prior to

insertion in a system. Communication to/from the DS1821 is accomplished through the DQ pin in a

programming mode; this same pin is used in operation as the thermostat output.

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DS1821S	MAXIM	Serial Switch/Digital Sensor, 8 Bit(s), 1Cel, Rectangular, 8 Pin, Surface Mount, 0.208 INC	获取价格