This part is a kind of semiconductor called TDA1905.

Function of this product has 5W AUDIO AMPLIFIER WITH MUTING.

Manufacturers : ST Microelectronics

Image and pinout :

Some of the text within the PDF file :

TDA1905 5W AUDIO AMPLIFIER WITH MUTING DESCRIPTION The TDA1905 is a monolithic integrated circuit in POWERDIP package, intended for use as low frequency power amplifier in a wide range of applications in radio and TV sets: – muting facility – protection against chip over temperature – very low noise – high supply voltage rejection – low ”switch-on” noise – voltage range 4V to 30V The TDA 1905 is assembled in a new plastic package, the POWERDIP, that offers the same assembly ease, space and cost saving of a normal dual in-line package but with a power dissipationof up to6W and a thermal resistance of 15°C/W (junction to pins). ABSOLUTE MAXIMUM RATINGS Symbol Vs Io Io Vi Vi V11 Ptot Tstg, Tj Supply voltage Output peak current (non repetitive) Output peak current (repetitive) [ ... ]

TDA1905 PDF Datasheet Download