Catalyst Semiconductor, Inc. was a fabless semiconductor company founded in 1985 and headquartered in Santa Clara, California. It specialized in designing and marketing analog and mixed-signal integrated circuits. Its product portfolio included non-volatile digital potentiometers (e.g., CAT51xx series), white LED drivers (e.g., CAT32, CAT42xx series), analog-to-digital converters, and power management ICs. The company also offered EEPROM memory products and supervisory circuits. Catalyst's digital potentiometers were widely used in industrial controls, consumer electronics, and automotive applications. In 2008, Catalyst Semiconductor was acquired by ON Semiconductor, expanding ON Semiconductor's analog and mixed-signal product offerings. Today, the Catalyst brand is integrated into ON Semiconductor's portfolio of standard and custom analog devices.