This part is a kind of semiconductor called TEA5591A.
Function of this product has AM/FM radio receiver circuit.
Manufacturers : NXP
Image and pinout :

Some of the text within the PDF file :
INTEGRATED CIRCUITS DATA SHEET TEA5591A AM/FM radio receiver circuit Product specification File under Integrated Circuits, IC01 February 1990 Philips Semiconductors Product specification AM/FM radio receiver circuit GENERAL DESCRIPTION TEA5591A The TEA5591A is a 24-pin integrated radio circuit, derived from the TEA5591 and is designed for use in AM/FM portable radios and clock radios. The TEA5591A differs from the TEA5591 in that it has: • Separate IF input pins for AM and FM • A split-up AM-IF stage (for distributed selectivity) • An LED driver indicator The main advantage of the TEA5591A is its ability to operate over a wide range of supply voltages (1.8 to 15 V) without any loss of performance. The AM circuit incorporates: • A double balance mixer • A ‘one-pin’ os [ ... ]
TEA5591A PDF Datasheet Download
