This part is a kind of semiconductor called TDA3505.

Function of this product has Video control combination circuit with automatic cut-off control.

Manufacturers : NXP

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Some of the text within the PDF file :

INTEGRATED CIRCUITS DATA SHEET TDA3505 TDA3506 Video control combination circuit with automatic cut-off control Product specification File under Integrated Circuits, IC02 November 1987 Philips Semiconductors Product specification Video control combination circuit with automatic cut-off control GENERAL DESCRIPTION TDA3505 TDA3506 The TDA3505 and TDA3506 are monolithic integrated circuits which perform video control functions in a PAL/SECAM decoder. The TDA3505 is for negative colour difference signals −(R-Y), −(B-Y) and the TDA3506 is for positive colour difference signals +(R-Y), +(B-Y). The required input signals are: luminance and colour difference (negative or positive) and a 3-level sandcastle pulse for control purposes. Linear RGB signals can be inserted from an external [ ... ]

TDA3505 PDF Datasheet Download