Datasheet

STCN75 Description
Doc ID 13307 Rev 9 7/36
1.2 Temperature sensor output
The STCN75 Temperature Sensor has a dedicated open drain overlimit 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 (T
OS
) READ/WRITE register), and the hysteresis temperature (which is stored in
the 16-bit (T
HYS
) 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
1. SDA and OS/INT are open drain.
Table 1. Signal names
Pin Sym Type/direction Description
1SDA
(1)
1. SDA and OS/INT are open drain.
Input/output Serial data input/output
2 SCL Input Serial clock input
3OS/INT
(1)
Output Overlimit signal/interrupt alert output
4 GND Supply ground Ground
5A
2
Input Address2 input
6A
1
Input Address1 input
7A
0
Input Address0 input
8V
DD
Supply power Supply voltage (2.7 V to 5.5 V)
AI11899
SDA
(1)
V
DD
STCN75
GND
SCL
OS/INT
(1)
A
0
A
1
A
2