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TTP223 Capacitive Touch Sensor (HCSENS0039) 
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Joined: Sun Aug 05, 2012 4:02 pm
Posts: 716
Post TTP223 Capacitive Touch Sensor (HCSENS0039)

A capacitive touch sensor module based on the dedicated TTP223 touch sensor IC. The module provides a single integrated touch sensing area of 11 x 10.5mm with a sensor range of ~5mm. An on-board LED will give a visual indication of when the sensor is triggered. When triggered the modules output will switch from its idle low state to high (default operation). Solder jumpers allow for reconfiguring its mode of operation to be either active low or toggle output.



Product Code: HCSENS0039
Supply Voltage: 2.5 to 5.5V
Supply current: (Vcc = 5V): 6uA (Idle) 16mA (Active)
Sensor area: 11 x 10.5mm
Max sensor range: ~5mm
Module dimensions: 14.5mm x 11mm


Will this module work if the sensor is placed behind a piece of perspex?

Yes, the module will work behind most types of material so long as they don't block or interfere with electromagnetic signals and the materials thickness does not exceed the maximum sensor range.



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Tue Apr 25, 2017 11:29 am

Joined: Fri Sep 22, 2017 3:35 am
Posts: 1
Post Re: TTP223 Capacitive Touch Sensor (HCSENS0039)

Can someone please explain to me as I'm a bit thick when it comes to electronics how to switch this module to low power toggle mode?


Sat Sep 23, 2017 6:54 pm
Site Admin

Joined: Sun Aug 05, 2012 4:15 pm
Posts: 781
Post Re: TTP223 Capacitive Touch Sensor (HCSENS0039)
Although the TP223 has a low power/ fast mode feature the SOT-23 version of the device used in these modules does't have the pin (LPMB) to select it. If I understand the datasheet correctly I believe the device is permanently fixed to fast mode.

To switch the module to toggle mode you need to bridge the two pads marked 'B' with a small blob of solder. This will pull the TOG pin high switching it to toggle mode.

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Mon Sep 25, 2017 8:39 am
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