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DS1820
DS1820 1–WireTM Digital Thermometer
FEATURES
PIN ASSIGNMENT
DALLAS DALLAS DS2434 DS1820 1 2 3
•
Unique 1–WireTM interface requires only one port pin for communication
• Multidrop capability simplifies distributed temperature
sensing applications
• Requires no external components • Can be powered from data line • Zero standby power required • 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
BOTTOM VIEW 1 2 3
• Temperature is read as a 9–bit digital value. • Converts temperature to digital word in 200 ms (typ.) • User–definable,
tings nonvolatile temperature alarm set-
DS1820 PR35 PACKAGE See Mech.
DS1820 Datasheet
