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Data Sheet

FULL DATA SHEET (PDF, 208kB) Download   E-Mail

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. 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

Application Notes

Application Note 67: Applying and Using the DS1620 in Temperature Control Applications - DS1620 Application Note 85: Interfacing the DS1620 to the Motorola SPI Bus - DS1620 Application Note 134: Interfacing the DS1620 with a DS5000/8051 Microcontroller - DS1620 Application Note 1771: Microcontrollers Improve Power Efficiency of 8051-Based Designs - DS1620 Application Note 3489: Installing the DS9123O USB Adapter on Windows® 98 - DS1620 Application Note 3930: Package Thermal Resistance Values (Theta JA, Theta JC) for Dallas Semiconductor Temperature Sensors - DS1620

Evaluation Kits

none

Design Guides

TEMP SENSORS (PDF)

Reliability Reports

Reliability Report: DS1620.pdf

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-6 of 6
DS1620	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1620			PDIP;8 pin;80 mm² Dwg: 56-G5005-000A (PDF) Use pkgcode/variation: P8-9*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS1620+			PDIP;8 pin;80 mm² Dwg: 56-G5005-000A (PDF) Use pkgcode/variation: P8+9*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1620S			SOIC;8 pin;44 mm² Dwg: 56-G4010-001B (PDF) Use pkgcode/variation: W8-3*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS1620S/T&R			SOIC;8 pin;44 mm² Dwg: 56-G4010-001B (PDF) Use pkgcode/variation: W8-3*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS1620S+			SOIC;8 pin;44 mm² Dwg: 56-G4010-001B (PDF) Use pkgcode/variation: W8+3*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1620S+T&R			SOIC;8 pin;44 mm² Dwg: 56-G4010-001B (PDF) Use pkgcode/variation: W8+3*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis

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