This part is a kind of semiconductor called TDA1554Q.

Function of this product has 4 x 11 W single-ended or 2 x 22 W power amplifier.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

INTEGRATED CIRCUITS DATA SHEET TDA1554Q 4 x 11 W single-ended or 2 x 22 W power amplifier Product specification File under Integrated Circuits, IC01 May 1992 Philips Semiconductors Product specification 4 x 11 W single-ended or 2 x 22 W power amplifier GENERAL DESCRIPTION TDA1554Q The TDA1554Q is an integrated class-B output amplifier in a 17-lead single-in-line (SIL) plastic power package. The circuit contains 4 x 11 W single-ended or 2 x 22 W bridge amplifiers. The device is primarily developed for car radio applications. Features • Requires very few external components • Flexibility in use − Quad single-ended or stereo BTL • High output power • Low offset voltage at outputs (important for BTL) • Fixed gain • Good ripple rejection • Mute/stand-by switch • Load [ ... ]

TDA1554Q PDF Datasheet Download