Datasheet

STLM75 Operation
Doc ID 13296 Rev 12 15/40
2.7 Temperature data format
Table 3 shows the relationship between the output digital data and the external temperature.
Temperature data for the temperature, T
OS
, and T
HYS
registers is represented as a 9-bit,
two’s complement word.
The left-most bit in the output data stream contains temperature polarity information for
each conversion. If the sign bit is '0', the temperature is positive and if the sign bit is '1,' the
temperature is negative.
2.8 Bus timeout feature
The STLM75 supports an SMBus compatible timeout function which will reset the serial
I
2
C/SMBus interface if SDA is held low for a period greater than the timeout duration
between a START and STOP condition. If this occurs, the device will release the bus and
wait for another START condition.
Table 3. Relationship between temperature and digital output
Temperature
Digital output
Binary HEX
+125 °C 0 1111 1010 0FAh
+25 °C 0 0011 0010 032h
+0.5 °C 0 0000 0001 001h
0 °C 0 0000 0000 000h
–0.5 °C 1 1111 1111 1FFh
–25 °C 1 1100 1110 1CEh
–40 °C 1 1011 0000 1B0h
–55 °C 1 1001 0010 192h