BUY U665B https://www.utsource.net/itm/p/158561.html
IC for Headphone Stereos Monolithic IC LAG 665
The U665B is a 8-pin dual-in-line package (DIP) transistor from TFK. It is a NPN silicon epitaxial planar transistor designed for general purpose switching and amplification applications. Features: * Collector-emitter voltage: 40V * Collector current: 0.2A * Power dissipation: 500mW * Transition frequency: 100MHz Applications: * Audio amplifiers * Motor control * Switching circuits * General purpose amplification (For reference only)