This part is a kind of semiconductor called LA4224.

Function of this product has 1W Monaural Power AMplifier.

Manufacturers : Sanyo Electric

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Some of the text within the PDF file :

Ordering number : ENA0317 Monolithic Linear IC LA4224 Overview Audio Output for TV application 1W Monaural Power Amplifier LA4224 is a 1W monaural power amplifier intended for television audio output. This IC requires only two external components (capacitors) to construct amplifiers and is ideal for realizing substantial cost reduction of electronic devices. Functions • 1W monaural power amplifier (VCC = 9V, RL = 8Ω). • Built-in Mute transistor. Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Collector-to-emitter voltage Emitter-to-collector voltage Operating temperature Storage temperature Symbol VCC max VCEO VECO Topr Tstg No signal Voltage between 3pin-6pin of mute transistor Voltage between 6pin-3pin of mute transistor Conditions Ratings 1 [ ... ]

LA4224 PDF Datasheet Download