Overview: 

The ST04D is an upgrade from the ST04C. This touch sensor can detect capacitance changes at the sensing point using the average capacitance value as a reference. It can sense capacitance changes through any non-conductive medium. In this way, the sensor module can be well isolated from water and dust. The chip can be operated in a low-power environment. When the power supply is 5v, the current consumption is 110ua in normal operation under power saving mode, and less than 10ua in sleep standby mode.

 Features.

● 4-channel sensor chip with self-calibration function

● Can sense ‘key touch’ through any non-conductive medium.

● Adjustment of sensitivity by external capacitor

● Open-Drain output format

● Package (SOP-16) 

Applications.

●  Replacement switch.

●  Human Sensor Detection.

●  Human interface for toys and interactive games.

● light switch.

●Replacement diaphragm switch.

●Sealed Keyboard Panels.