DS1775
SOT23-5 Digital Thermometer
and Thermostat
www.maxim-ic.com
FEATURES
PIN ASSIGNMENT
C Temperature measurements require no
external components
SCL
GND
O.S.
1
SDA
5
C Measures temperatures from –55LC to
+125LC. Fahrenheit equivalent is –67LF to
257LF
2
3
VDD
4
C Thermometer accuracy is M2.0LC
C Thermometer resolution is configurable from
9 to 12 bits (0.5LC to 0.0625LC resolution)
C Thermostat settings are user definable
C Data is read from/written to via a 2–wire
serial interface
DS1775R
SOT23-5
PIN DESCRIPTION
GND
SCL
SDA
VDD
Ground
2–Wire Serial Clock
2–Wire Serial Data Input/Output
Power Supply Voltage
Thermostat Output Signal
C Wide power supply range (2.7V – 5.5V)
C Software compatible with DS75 2–Wire
Thermal Watchdog in thermometer mode
C Space–conscious SOT23–5 package with
low thermal time constant
O.S.
ORDERING INFORMATION
Part Number
Address
000
Part Number
Address
100
DS1775R/TRL
DS1775R/TR1
DS1775R/TR2
DS1775R/TR3
DS1775R/TR4
001
DS1775R/TR5
DS1775R/TR6
DS1775R/TR7
101
010
011
110
111
* "R" denotes SOT 23-5 Package
DESCRIPTION
The DS1775 SOT23-5 Digital Thermometer and Thermostat provides temperature readings which
indicate the temperature of the device. Thermostat settings and temperature readings are all
communicated to/from the DS1775 over a simple 2–wire serial interface. No additional components are
required; the device is truly a “temperature–to–digital” converter.
For applications that require greater temperature resolution, the user can adjust the readout resolution
from 9 to 12 bits. This is particularly useful in applications where thermal runaway conditions must be
detected quickly.
The open–drain thermal alarm output, O.S., becomes active when the temperature of the device exceeds a
user–defined temperature TOS. The number of consecutive faults required to set O.S. active is
configurable by the user. The device can also be configured in the interrupt or comparator mode, to
customize the method which clears the fault condition.
As a digital thermometer, the DS1775 is software compatible with the DS75 2–Wire Thermal Watchdog.
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