This part is a kind of semiconductor called AN7164.
Function of this product has 30 W BTL audio power amplifier.
Manufacturers : Panasonic Semiconductor
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ICs for Audio Common Use AN7164 30 W BTL audio power amplifier s Overview The AN7164 is an integrated circuit designed for 30 W (VCC = 21 V, 8 Ω) output power amplifier. High power output (BTL 30 W), low distortion and low noise are realized. High reliability is obtained due to various kinds of protectors built in. Furthermore, on-off of output is possible from standby terminal. 7.7±0.3 Unit : mm 12 (10.0) φ3.6 29.75±0.30 28.0±0.3 20.0±0.3 (1.27) (1.3) R1.8 • High power output • Low distortion, Low noise • Low shock noise when power supply is turned-on, off • Built-in standby function • Built-in protection circuits (Temperature, Overcurrent, Load short circuit, Output GND short circuit) 0.6 s Features +0.10 0.25 –0.05 2.54 1 0.6 –0.05 (1.27) (10.0) +0.1 [ ... ]