STCN75 datasheet(7/35 Pages) STMICROELECTRONICS

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STCN75

Summary description

7/35

1.2

Temperature sensor output

The STCN75 Temperature Sensor has a dedicated open drain Over-Limit Signal/Interrupt

(OS/INT) output which features a thermal alarm function. This function provides a user-

programmable trip and turn-off temperature. It can operate in either of two selectable

modes:

●

Section 2.3: Comparator mode

●

Section 2.4: Interrupt mode.

At power-up the STCN75 immediately begins measuring the temperature and converting

the temperature to a digital value.

The measured temperature value is compared with a temperature limit (which is stored in

the 16-bit (TOS) READ/WRITE register), and the hysteresis temperature (which is stored in

the 16-bit (THYS) READ/WRITE register). If the measured value exceeds these limits, the

OS/INT pin is activated (see Figure 3 on page 8).

Note:

See Pin descriptions on page 8 for details.

Figure 1.

Logic diagram

SDA and OS/INT are open drain.

Table 1.

Signal names

Sym

Type/direction

Description

1SDA(1)

SDA and OS/INT are open drain.

Input/ Output

Serial data input/output

SCL

Input

Serial clock input

3OS/INT(1)

Output

Over-limit signal/interrupt alert output

GND

Supply Ground

Ground

5A2

Input

Address2 Input

6A1

Input

Address1 Input

7A0

Input

Address0 Input

8VDD

Supply power

Supply voltage (2.7V to 5.5V)

AI11899

SDA(1)

VDD

STCN75

GND

SCL

OS/INT(1)

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