STLM75 datasheet(15/37 Pages) STMICROELECTRONICS

No. de pieza	STLM75

Descripción Electrónicos	Digital temperature sensor and thermal watchdog

PDF	37 Pages

Scroll/Zoom	100%

Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

Página de inicio	http://www.st.com

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STLM75

Operation

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2.7

Temperature data format

Table 3 shows the relationship between the output digital data and the external temperature.

Temperature data for the temperature, TOS, and THYS 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

I2C/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

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