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GENERAL DESCRIPTION
The DS620 digital thermometer and thermostat
provides low-voltage (1.7V d V
DD
d 3.5V) temperature
measurements with ?.5癈 accuracy from 0癈 to
+70癈 and an operating temperature range of -55癈
to +125癈. The DS620 communicates over a 2-wire
digital interface. For distributed-sensing applications,
it is multidroppable with three address pins that allow
up to eight DS620s to operate on a single bus.
The DS620 has thermostat functionality with user-
defined thresholds stored in EEPROM registers, and
it can be configured for standalone thermostat
operation. The programmable output (PO) pin serves
as the thermostat output, and this pin can also be
configured to function as an active-low control for
peripheral devices.
 
 
APPLICATIONS
Portable Applications
Low-Voltage Temperature-Sensitive Applications
Computers/Servers
Test Equipment
Medical Instruments
Industrial Applications
 
 
 
TYPICAL OPERATING CIRCUIT
 
FEATURES
   Low-Voltage Operation: 1.7V to 3.5V 
   ?/SPAN>0.5?/SPAN>C Accuracy from 0?/SPAN>C to +70?/SPAN>C 
   Operating Temperature Range: -55?/SPAN>C to +125?/SPAN>C 
(-67癋 to +257癋)
   Temperature Measurements Require No 
External Components
   Resolution is User-Selectable to 10-, 11-, 12-, or 
13-Bits (0.5癈, 0.25癈, 0.125癈, and 0.0625癈
LSb Weight, Respectively)
   Multidroppable 
   Fast (200ms max) Temperature-to-Digital 
Conversion Time
   Thermostatic Settings are User-Definable and 
Nonvolatile
   Standalone Thermostat Capability 
   Data is Read/Written Through a 2-Wire Serial 
Interface
   Package: 8-Pin ?/SPAN>SOP  
 
ORDERING INFORMATION
PART
TEMP RANGE
PIN-PACKAGE
DS620U
-55癈 to +125癈
8 礢OP,
Exposed Pad
DS620U/T&R
-55癈 to +125癈
8 礢OP
Exposed Pad
Tape-and-Reel
 
PIN CONFIGURATION
 
 
 
 
.
DS620
Low-Voltage, ?/SPAN>0.5癈 Accuracy
Digital Thermometer and Thermostat
www.maxim-ic.com
 
VDD 
PO 
SDA 
SCL
0 
1 
2 
GND
1.7V to 3.5V 
HOST 
SDA 
SCL 
1.7V to 3.5V
Thermostat
DS620
PAD
PAD
8-Pin ?/SPAN>SOP Package
Exposed Pad
SD
SCL
PO
GND
VDD
0
1
2
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