STCN75_08 Datasheet, PDF (11/35 Pages) STMicroelectronics – Digital temperature sensor and thermal watchdog

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 V_DD 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
Master
Device
I2C Address = 1001000 (1001A2A1A0)
AI12200
1. SDA and OS/INT are open drain.
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.
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