STM8T141 datasheet(17/50 Pages) STMICROELECTRONICS

Part #	STM8T141

Description	Single-channel capacitive sensor for touch or proximity detection with shielded sensing electrode

PDF	50 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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17 / 50 page

STM8T141

Typical application diagram

Doc ID 15699 Rev 7

17/50

Typical application diagram

Figure 10.

Typical application shematic

If the active shield is not used, The SHLDIN pin must be grounded, SHLDOUT should be left unconnected, and

RSHIELD

can be removed.

Use COG or NPO or higher grade capacitor.

The smaller the value of the RSHIELD resistor, the better its effect but, the greater the device

consumption.

Pin TOUT/POUT can directly drive a HV FET (as shown in Figure 11) that, in turn, can drive

any load.

Figure 11.

Possible load configurations

A touch or proximity detection is defined as an actuation (high = logical '1' and



low = logical '0').

GND

LED

LED as Load

Relay on Load

terminals to

Switch any High

Voltage Load

Low Voltage DC

Light Bulb as Load

TOUT/POUT

Load

voltage

Load POS

Load NEG

Load POS

Load NEG

Load POS

Load NEG

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STM8T141 Datasheet(PDF) 17 Page - STMicroelectronics