This part is a kind of semiconductor called TDA3810.

Function of this product has Spatial/ stereo and pseudo-stereo sound circuit.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

INTEGRATED CIRCUITS DATA SHEET TDA3810 Spatial, stereo and pseudo-stereo sound circuit Product specification File under Integrated Circuits, IC02 January 1985 Philips Semiconductors Product specification Spatial, stereo and pseudo-stereo sound circuit DESCRIPTION TDA3810 The TDA3810 integrated circuit provides spatial, stereo and pseudo-stereo sound for radio and television equipment. Features • Three switched functions: – spatial (widened stereo image) – stereo – pseudo-stereo (artificial stereo from a mono source) • Offset compensated operational amplifiers to reduce switch noise • LED driver outputs to facilitate indication of selected operating mode • Start/stop circuit to reduce switch noise and to prevent LED-flicker • TTL-compatible control inputs QUICK REFE [ ... ]

TDA3810 PDF Datasheet Download