Zilog, Inc., previously known as ZiLOG, is an American manufacturer of 8-bit and 16-bit microcontrollers. Its most famous product is the Z80 series, 8-bit microprocessors that were compatible with the Intel 8080 but less expensive to use. The Z80 was widely used during the 1980s in many popular home computers such as the TRS-80 and the ZX81. Both 16- and 32-bit processors were also produced by the company, but these did not see widespread use. From the 1990s the company focused primarily on the microcontroller market.