Vehicle-mounted SerDes chip, automobile accessory comprising same and automobile

The invention relates to a vehicle-mounted SerDes chip, an automobile accessory comprising the vehicle-mounted SerDes chip and an automobile. The vehicle-mounted SerDes chip comprises a high-speed clock generation system, and the high-speed clock generation system comprises a phase-locked loop which carries out frequency multiplication on an input reference clock signal and then generates a high-speed clock signal as an intermediate frequency source; the multi-phase clock generator is used for receiving the high-speed clock signal from the phase-locked loop and generating a same-frequency multi-phase clock signal; and the high-speed clock synthesizer receives the same-frequency multi-phase clock signal from the multi-phase clock generator and synthesizes a multi-phase synthesized clock signal with higher frequency than the high-speed clock signal and the same-frequency multi-phase clock signal. According to the invention, a high-speed multiphase clock with an accurate phase relation can be generated by using