LM77

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SNIS103F – JUNE 1999 – REVISED MARCH 2013

Note: Event Interrupt mode is drawn as if the user is reading the part. If the user doesn't read, the outputs would go

low and stay that way until the LM77 is read.

Figure 7. Temperature Response Diagram

TEMPERATURE DATA FORMAT

Temperature data can be read from the Temperature and Set Point registers; and written to the Set Point

registers. Temperature data can be read at any time, although reading faster than the conversion time of the

LM77 will prevent data from being updated. Temperature data is represented by a 10-bit, two's complement word

with an LSB (Least Significant Bit) equal to 0.5°C:

Digital Output

Temperature

Binary

Hex

+130°C

01 0000 0100

104h

+125°C

00 1111 1010

0FAh

+25°C

00 0011 0010

032h

+0.5°C

00 0000 0001

001h

0°C

00 0000 0000

000h

−0.5°C

11 1111 1111

3FFh

−25°C

11 1100 1110

3CEh

−55°C

11 1001 0010

392h

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