DS1620
Digital Thermometer and Thermostat

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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. THIGH is driven high if the DS1620’s temperature is greater than or equal to a user–defined temperature TH. TLOW is driven high if the DS1620’s temperature is less than or equal to a user–defined temperature TL. TCOM is driven high when the temperature exceeds TH and stays high until the temperature falls below that of TL.

Voltage on Any Pin Relative to Ground    –0.5V to +6.0V
Operating Temperature                        –55 to +125
Storage Temperature                          –55 to +125
Soldering Temperature                  260 for 10 seconds
* This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
·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 750 ms (max)
·Thermostatic settings are user-definable and nonvolatile
·Data is read from/written via a 3-wire serial interface (CLK, DQ, RST )
·Applications include thermostatic controls, industrial systems, consumer products, thermometers, or any thermally sensitive system
·8-pin DIP or SOIC (208-mil) packages

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Datasheet

Size: 539.85KB
Page: 13
PDF: DS1620.pdf
  • Description:
    Digital Thermometer and Thermostat
  • MFG:
    DALLAS [Dallas Semiconducotr]
 

Abstract


1 of 13 072099
FEATURES
§ 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, RST )
§ Applications include thermostatic controls,
industrial systems, consumer products,
thermometers, or any thermally sensitive
system
§ 8-pin DIP or SOIC (208-mil) packages
PIN ASSIGNMENT
PIN DESCRIPTION
DQ - 3-Wire Input/Output
CLK/ CONV - 3-Wire Clock Input and
Stand-alone Convert Input
RST - 3-Wire Reset Input
GND - Ground
THIGH - High Temperature Trigger
TLOW - Low Temperature Trigger
TCOM - High/Low Combination Trigger
VDD - Power Supply Voltage (3V - 5V)
DESCRIPTION
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.
THIGH is driven high if the DS1620’s temperature is greater than or equal to a user–defined temperature
TH. TLOW is driven high if the DS1620’s temperature is less than or equal to a user–defined temperature
TL. TCOM is driven high when the temperature exceeds TH and stays high until the temperature falls
below that of TL.
DS1620
Digital Thermometer and Thermostat
www.dalsemi.com
63
1
2
4
8
7
5
DQ
CLK/CONV
RST
GND
VDD
THIGH
TLOW
TCOM
DS1620S 8-Pin SOIC (208-miil)
See Mech Drawings Section
63
1
2
4
8
7
5
DQ
CLK/CONV
RST
GND
VDD
THIGH
TLOW
TCOM
DS1620 8-Pin DIP (300-mil)
See Mech Drawings Section

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