This part is a kind of semiconductor called TS01S.

Function of this product has 1-Ch Differential Sensitivity Calibration Capacitive Touch Sensor.

Manufacturers : ADSemiconductor

Image and pinout :

Some of the text within the PDF file :

www.DataSheet.co.kr TS01S 1-Ch Differential Sensitivity Calibration Capacitive Touch Sensor SPECIFICATION V2.4 February 2008 Datasheet pdf - http://www.net/ www.DataSheet.co.kr ADSemiconductor® TS01S (1-CH Differential Sensitivity Calibration Capacitive Touch Sensor) 1 Specification 1.1 General features          1-Channel capacitive touch sensor with differential sensitivity calibration Low power consumption Uniformly adjustable sensitivity Sync function for parallel operation Three steps sensitivity available without external component Open-drain digital output Internal power on reset Embedded common and normal noise elimination circuit RoHS compliant SOT-26 package 1.2 Application      Home appliance Mobile application (PMP, Navigation, MP3 etc) Membran [ ... ]

TS01S PDF Datasheet Download