This part is a kind of semiconductor called AN6650.

Function of this product has Motor Speed Control Circuit.

Manufacturers : Unisonic Technologies

Image and pinout :

Some of the text within the PDF file :

UNISONIC TECHNOLOGIES CO., LTD. AN6650 LINEAR INTEGRATED CIRCUIT MOTOR SPEED CONTROL CIRCUIT  DESCRIPTION The UTC AN6650 is a monolithic integrated circuit, designed for the tape recorder.  FEATURES *Wide Operating Supply Voltage: VCC=1.8V-7V *Few External Components *Easy Speed Control Mode  ORDERING INFORMATION Ordering Number Lead Free Halogen Free AN6650L-D08-T AN6650G-D08-T - AN6650G-S08-R Package DIP-8 SOP-8 Packing Tube Tape Reel  MARKING DIP-8 SOP-8 www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 5 QW-R109-002.E AN6650  BLOCK DIAGRAM Comp. Input 4 1k Motor 7 10k LINEAR INTEGRATED CIRCUIT VREF- 1 VREF+ 2 Reference Voltage 10k VCC 3 Start Circuit 8 Phase 5 GND 6 GND UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com [ ... ]

AN6650 PDF Datasheet Download