This part is a kind of semiconductor called AN17831A.

Function of this product has Silicon Monolithic Bipolar IC / Audio.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

DataShee DataSheet 4 U .com etcom DataShee DataSheet 4 U .com Prepared Checked Approved Product Specifications Ref No. Total Page Page No. C-1 9 3 AN17831A Description of Test Circuits and Test Methods [Test Circuit 1] AN17831A 1 Vcc 2 3 4 10µ 5 + 51kΩ 20kΩ STB ON 6 7 8 33µ 9 + 10 11 V out2 RL 4Ω 12 + V out1 RL 4Ω 2200µ 8.2kΩ 20kΩ MUTE ON 3V OFF Vin1 5V Vin2 OFF Note : * STB 'OFF' means 5V . MUTE 'OFF' means 0V . Eff. Date 18-FEB-2002 Eff. Date Eff. Date Eff. Date Semiconductor Company, Matsushita Electric Industrial Co., Ltd. FMSC-PSDA-002-01 Rev.1 Prepared Checked Approved Product Specifications [ ... ]

AN17831A PDF Datasheet Download