Digital Temperature Sensor and Thermal

Watchdog with 2-Wire Interface

6

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SCL

SDA

ACKNOWLEDGE

(A)

STOP

CONDITION

(P)

START

CONDITION

(S)

START

CONDITION

(S)

REPEATED START

CONDITION

(SR)

PARAMETERS ARE MEASURED FROM 10% TO 90%.

Figure 2. Serial Bus Timing

UPPER BYTE

LOWER BYTE

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Sign bit

1= Negative

0 = Positive

MSB

64

32°C

16°C

8°C

4°C

2°C

1°C

LSB

0.5°C

XXXXX

XX

X

= Don’t care.

X

= Don’t care.

DIGITAL OUTPUT

TEMPERATURE (°C)

BINARY

HEX

+125

0111 1101 0XXX XXXX

7D0X

+25

0001 1001 0XXX XXXX

190X

+0.5

0000 0000 1XXX XXXX

008X

0

0000 0000 0XXX XXXX

000X

-0.5

1111 1111 1XXX XXXX

FF8X

-25

1110 0111 0XXX XXXX

E70X

-55

1100 1001 0XXX XXXX

C90X

Table 4. Temperature Data Output Format

0111 1101 0

0001 1001 0

0000 0000 1

0000 0000 0

1111 1111 1

1110 0111 0

1100 1001 0

-55

-25

-0.5 0 +0.5

+25

+125

LOCAL

TEMPERATURE (C)

Figure 3. Temperature-to-Digital Transfer Function