ON Semiconductor Corporation (stylized and doing business as onsemi) is an American semiconductor supplier company, based in Scottsdale, Arizona. Products include power and signal management, logic, discrete, and custom devices for automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power applications. onsemi runs a network of manufacturing facilities, sales offices and design centers in North America, Europe, and the Asia Pacific regions. Based on its 2016 revenues of $3.907 billion, onsemi ranked among the worldwide top 20 semiconductor sales leaders, and was ranked No. 483 on the 2022 Fortune 500 based on its 2021 sales.
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History
The company was founded in 1999. It was originally a spinoff of Motorola's Semiconductor Components Group headquartered in Phoenix, Arizona. It continues to manufacture Motorola's discrete, standard analog, and standard logic devices. On April 28, 2000, Onsemi launched its initial public offering (IPO).
Steve Hanson was the first president and chief executive officer of the company until 2002. Keith Jackson from Fairchild Semiconductor replaced Hanson as the second leader for the next 20 years. Major acquisitions added SANYO Semiconductor in 2011 and Fairchild Semiconductor in 2016, with total workforce over 30,000 and expanded its product portfolio.
In April 2019, the company signed the UN Global Compact. In September 2020, chief executive officer Keith Jackson announced his retirement from the company. In December 2020, Hassane El-Khoury, previously the president and chief executive officer of Cypress Semiconductor, succeeded Jackson. In August 2021, to better reflect its broad technology portfolio, differentiated product lines, and market leadership, ON Semiconductor rebranded itself as onsemi. In February 2022, it was announced that BelGaN Group BV had completed the acquisition of all shares of ON Semiconductor Belgium BV from the onsemi group.
Acquisitions
In April 2000, onsemi completed the acquisition of Cherry Semiconductor Corp. (CSC) for $250 million. CSC was founded in 1972 as Micro Components Corporation (MCC). CSC was headquartered in East Greenwich, Rhode Island, USA.
In 2003, onsemi acquired TESLA SEZAM (manufacturer of semiconductor chips) and TEROSIL (production of silicon) in the Czech Republic. Both of these companies were the successors of the former state-owned company TESLA.
In May 2006, onsemi completed the acquisition of LSI Logic Gresham, Oregon Design & Manufacturing Facility.
In January 2008, onsemi completed the acquisition of the CPU Voltage and PC Thermal Monitoring Business from Analog Devices, Inc., for $184 million.
In December 2008, onsemi completed the acquisition of AMI Semiconductor (previously known as American Microsystems) for $915 million.
On July 17, 2008, onsemi and Catalyst Semiconductor, Inc. announced the acquisition of Catalyst Semiconductor, Inc. by onsemi for $115 million. On October 9, 2008, Catalyst Semiconductor, Inc. announced the approval of the acquisition. On October 10, 2008, onsemi announced the completion of the acquisition.
In November 2009, onsemi completed the acquisition of PulseCore Semiconductor for $17 million.
In December 2009, onsemi announced the acquisition of California Micro Devices.
In June 2010, onsemi completed the acquisition of Sound Design Technologies, Ltd., for $22 million.
In January 2011, onsemi completed the acquisition of SANYO Semiconductor.
In February 2011, onsemi completed the acquisition of the CMOS Image Sensor Business Unit from Cypress Semiconductor, for $31.4 million.
Products
onsemi manufactures products in the following areas:
Custom: ASICs; Custom Foundry Services; Custom ULP Memory; Custom CMOS Image Sensors; Integrated passive devices
Discrete: Bipolar Transistors; Diodes & Rectifiers; IGBTs & FETs; Thyristors; Silicon Carbide (SiC)
Power Management: AC/DC Controllers & Regulators; DC/DC Controllers, Converters, & Regulators; Drivers; Thermal Management; Voltage & Current Management
Logic: Clock Generation; Clock & Data Distribution; Memory; Microcontrollers; Standard Logic
Signal Management: Amplifiers & Comparators; Analog Switches; Audio/Video ASSP; Digital Potentiometers; EMI/RFI Filters; Interfaces; Optical, Image, & Touch Sensors
In 2013, the company introduced the industry's highest resolution optical image stabilization (OIS) integrated circuit (IC) for smartphone camera modules. As of December 2025, onsemi has more than 25,000 Portfolio SKUs.
Corporate responsibility
Onsemi plans to achieve net-zero emissions by 2040. The industrial and automotive sectors, which are among the company's most important end markets, are responsible for more than 65% of global greenhouse gas emissions. This highlights the need for climate initiatives.
In May 2024, the company's ESG risk rating was at 20.8%.
Operations
The company has three segments:
Analog and Mixed-Signal Group (AMG)
Intelligent Sensing Group (ISG)
Power Solutions Group (PSG)
Facilities
There are several Solution Engineering Centers (SEC) and Design Centers around the world. The company established the "onsemi Silicon Carbide Crystal Center" at the Penn State's Materials Research Institute in 2023. Solution Engineering Centers are in the United States, Germany, South Korea, China, Taiwan, Japan, Slovakia, and Sweden. Design centers are located in the United States, Canada, Belgium, Czech Republic, Germany, Ireland, Romania, Slovakia, Sweden, Switzerland, India, Israel, Italy, Japan, South Korea, and Taiwan. The company has manufacturing facilities in Canada, the United States, the Czech Republic, China, Japan, Malaysia, South Korea, the Philippines, and Vietnam. As of March 1, 2023, onsemi's headquarters was located in Scottsdale, Arizona.