Datasheet

STCN75 Operation
Doc ID 13307 Rev 9 11/36
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
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.
AI12200
Pull-up
V
DD
O.S./INT
(1)
V
DD
V
DD
Master
Device
0.1µF
STCN75
SCL
GND
SDA
(1)
Pull-up
V
DD
10kΩ
10kΩ 10kΩ
A
0
A
1
A
2
I
2
C Address = 1001000 (1001A
2
A
1
A
0
)