STCN75DS2F Просмотр технического описания (PDF) - STMicroelectronics

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STCN75DS2F

Digital temperature sensor and thermal watchdog

STMicroelectronics 

STCN75

Operation

2.1

Applications information

STCN75 digital temperature sensors are optimal for thermal management and thermal

protection applications. They require no external components for operations except for pull-

up resistors on SCL, SDA, and OS/INT outputs. A 0.1 µF bypass capacitor on VDD is

recommended. The sensing device of STCN75 is the chip itself. The typical interface

connection for this type of digital sensor is shown in Figure 4 on page 11.

Intended applications include:

● System thermal management

● Computers/disk drivers

● Electronics/test equipment

● Power supply modules

● Consumer products

● Battery management

● Fax/printers management

● Automotive

Figure 4. Typical 2-wire interface connections diagram

Pull-up

VDD

10kΩ

VDD

Pull-up

VDD

VDD

STCN75

0.1µF

10kΩ

10kΩ

O.S./INT(1) SCL

A0

SDA(1)

A1

A2

GND

1. SDA and OS/INT are open drain.

Master

Device

I2C Address = 1001000 (1001A2A1A0)

AI12200

2.2

Thermal alarm function

The STCN75 thermal alarm function provides user-programmable thermostat capability and

allows the STCN75 to function as a standalone thermostat without using the serial interface.

The OS/INT output is the alarm output. This signal is an open drain output, and at power-up,

this pin is configured with active-low polarity by default.

Doc ID 13307 Rev 9

11/36

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