Micrel, Incorporated, doing business as Micrel Semiconductor, engages in the design, development, manufacture, and marketing of analog power, mixed-signal, and digital integrated circuits (ICs) primarily in North America, Europe, and Asia. It offers power conversion products, including LDOs, DC/DC converters, analog power switches, PMIC devices, RF PA bias products, solid state lighting products, and FET drivers; supervisory and reference products; and general linear parts, such as op amps, thermal measurement devices, timers, and other general devices. The company also offers power analog circuits for notebook computers, tablet PCs, and smart phones; and radio frequency (RF) data communications products, including QwikRadio family of RF receivers and transmitters for use in garage door openers, lighting and fan controls, automotive keyless entry, and remote controls, as well as RadioWire transceivers for applications, such as remote metering, security systems, and factory automation. In addition, it develops and produces timing, clock management, high speed physical media devices, and interface integrated circuits for communications products targeted at fiber optic modules, active cables, backplane management, and data and clock management applications; and offers Ethernet products, including physical layer transceivers, media access controllers, switches, and system-on-chip devices for use in the digital home, enterprise, industrial, and automotive markets. Further, the company manufactures custom analog and mixed-signal circuits; and provides wafer foundry services for customers, who produce electronic systems for communications, consumer, and military applications. Its products are used in cellular handsets, portable computing, enterprise and home networking, wide area and metropolitan area networks, digital televisions, and industrial equipment. The company was founded in 1978 and is headquartered in San Jose, California.