BUY U666B https://www.utsource.net/itm/p/713489.html
GHz prescaler factor = 256
Description: U666B is an 8-pin DIP (dual in-line package) transistor from TFK. Features: Low collector-emitter saturation voltage High current gain Low noise High frequency operation High switching speed Applications: Audio amplifiers Switching circuits Motor control Power supplies Signal processing circuits (For reference only)