This part is a kind of semiconductor called PT-8A978P.

Function of this product has 5-Function Remote Controller.

Manufacturers : Pericom Semiconductor Corporation

Image and pinout :

Some of the text within the PDF file :

Data Sheet PT8A977P/977W/978P/978LW 5-Function Remote Controller ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Features • PT8A977P/977W works as encoder and PT8A978P/978LW works as decoder • Five pins for five control functions • Operating power-supply voltage: 2.5V to 5.0V (977P, 977W, 978P), 2.0V to 5.0V (978LW) General Description The PTA977P (or 977W) and PT8A978P (or 978LW) provide a complete control functions to the remotecontrolled toy. The PT8A977P/977W has five input pins corresponding with the five function buttons i.e, f [ ... ]

PT-8A978P PDF Datasheet Download