This part is a kind of semiconductor called TA8227P.

Function of this product has LOW FREQUENCY POWER AMPLIFIER.

Manufacturers : Toshiba

Image and pinout :

Some of the text within the PDF file :

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic TA8227P Low Frequency Power Amplifier TA8227P is an audio power IC with built-in two channels developed for portable radio cassette tape recorder with power ON/OFF switch. Because of the parts reduction and DIP (Dual Inline Package), space merit is remarkable. Thermal shut down protection circuit is built in. Features · High power : Pout = 2.5 W/CH (typ.) (VCC = 9 V, RL = 4 Ω, f = 1 kHz, THD = 10%) Weight: 1.4 g (typ.) : Pout = 3.0 W/CH (typ.) (VCC = 9 V, RL = 3 Ω, f = 1 kHz, THD = 10%) · Voltage gain : Gv = 45.0dB (typ.) (Rf = 120 Ω, f = 1 kHz) : Gv = 56.5dB (typ.) (Rf = 0 Ω, f = 1 kHz) · Small quiescent current : ICCQ = 21 mA (typ.) (VCC = 9 V, Vin = 0) · Ripple rejection ratio : R.R. = −52dB (typ.) ( [ ... ]

TA8227P PDF Datasheet Download