JL Semi

JLSemi Limited is a fabless semiconductor company headquartered in Shanghai, China, specializing in the design of high-performance Ethernet physical layer (PHY) chips and SoCs. The company pushes the boundary of Ethernet technology through innovations in silicon architecture, advanced DSP, and mixed-signal design, delivering industry-leading performance in range, resilience, and power consumption for networking applications. JLSemi's products serve automotive Ethernet, industrial Ethernet, and broader data communications markets, with key specialties in Ethernet PHY, SoC design, and mixed-signal signal processing. Founded in 2009 and privately held, JLSemi has offices in Shanghai (Pudong), Nanjing, and Singapore.