This part is a kind of semiconductor called TT6061A.

Function of this product has TOUCH DIMMER.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

CIRCUIT IDEAS touch signal is connected to the counter/ decoder via a resistor and clock input CK is connected to the counter/decoder via a frequency generator. Line frequency signal is taken through R4 at pin 2 of IC TT6061A. At zero crossing, the triac (BT136) triggers to drive a 200W bulb. The 6.8V power supply is taken directly from mains through resistors R1 and R3, diode D3, capacitor C4, and zener diode and fed to power-input pin 3 of the IC. Capacitors C1, C2, and C3 connected between touch input pin 4 and touch plate Pin Assignments of IC TT6061A Pin No. 1 2 3 4 5 6 7 8 Pin name CK FI VDD TI CI NC VSS AT Function description System clock input 50Hz line frequency Power input pin for VDD Touch input Sensor control input Not connected Power input pin for VSS Angle-trigger output TO [ ... ]

TT6061A PDF Datasheet Download