HS401x Datasheet

R36DS0023EU0103 Rev.1.03

Jun 6, 2022

Page 15

Figure 18. Alert Pin Function

4.6.2.

Alert Pin – Humidity and Temperature Threshold Detection

The Alert pin can also be configured to send a signal when a humidity / temperature threshold is exceeded, and

the system needs to take action. In this mode, the Alert feature has a programmable threshold, polarity, and

hysteresis, and can apply to both temperature and humidity measurements. An example of the functionality of

the Alert feature can be seen in Figure 19.

Time

State

of Alert

pin at

power-

up

Periodic

Measurement

Mode Activated

Measurementin Progress

Figure 19. Alert Pin Functionality Example

Trigger Threshold - High Alert

Reset Threshold - High Alert

Trigger Threshold - Low Alert

Reset Threshold - Low Alert