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DS1821T Datasheet

  • DS1821T

  • IC-DIGITAL THERMOMETER

  • 15頁

  • ETC

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DS1821
PRELIMINARY
DS1821
Programmable Digital Thermostat
FEATURES
PIN ASSIGNMENT
DALLAS
DALLAS
DS2434
DS1821
鈥?/div>
Requires no external components
鈥?/div>
Measures temperatures from 鈥?5擄C to +125擄C in 1擄C
increments. Fahrenheit equivalent is 鈥?7擄F to +257擄F
in 1.8擄F increments
1
2
3
鈥?/div>
Converts
(max.)
BOTTOM VIEW
DS1821
temperature to digital word in 1 second
鈥?/div>
Thermostatic settings are user definable and nonvol-
atile
鈥?/div>
Available in 3鈥損in PR35, TO鈥?20, and 8鈥損in SOIC
packages
systems, consumer products, thermometers, or any
thermally sensitive system
GND
DQ
VDD
DS1821
PR35 PACKAGE
See Mech. Drawing
Section
DQ
GND
NC
DNC
1
2
3
4
8
7
6
5
V
DD
NC
NC
DNC
鈥?/div>
Applications include thermostatic controls, industrial
VDD
DS1821T
TO鈥?20 PACKAGE
See Mech. Drawing
Section
DS1821S
8鈥揚IN SOIC (208 MIL)
See Mech. Drawing
Section
PIN DESCRIPTION
GND
DQ
V
DD
NC
DNC
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Ground
Data In/Out
Power Supply Voltage +5V
No Connect
Do Not Connect
DESCRIPTION
The DS1821 Programmable Digital Thermostat pro-
vides a thermal alarm logic output when the tempera-
ture of the device exceeds a user鈥揹efined temperature
TH. The output remains active until the temperature
drops below user defined temperature TL, allowing for
any hysteresis necessary.
User鈥揹efined temperature settings are stored in non鈥?/div>
volatile 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 pro-
gramming mode; this same pin is used in operation as
the thermostat output.
ECopyright
1995 by Dallas Semiconductor Corporation.
All Rights Reserved. For important information regarding
patents and other intellectual property rights, please refer to
Dallas Semiconductor data books.
021497 1/15
GND
DQ

DS1821T 產(chǎn)品屬性

  • 1

  • 集成電路 (IC)

  • PMIC - 熱管理

  • 1-Wire®

  • 溫度計，恒溫計

  • 內(nèi)部

  • -55°C ~ 125°C

  • ±1°C（最小值）

  • 數(shù)字

  • 無

  • 無

  • 2.7 V ~ 5.5 V

  • -55°C ~ 125°C

  • 通孔

  • TO-220-3

  • TO-220-3

  • -

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