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Renesas Electronics Corporation (Japanese:ルネサス エレクトロニクス株式会社,Hepburn:Runesasu Erekutoronikusu Kabushiki Gaisha) is a Japanesesemiconductor manufacturer headquartered inTokyo. The name "Renesas" is a contraction of "Renaissance Semiconductor for Advanced Solutions." The company was established in 2002 asRenesas Technology through the merger of the semiconductor divisions ofHitachi andMitsubishi Electric, excluding theirDRAM businesses.[4] In 2010, Renesas Technology merged withNEC Electronics to form the current company and adopting its present name.[5]
Renesas was among the world's six largest semiconductor companies during the 2000s and early 2010s.[6] As of 2023, it ranked 16th globally in semiconductor sales and second in Japan. In 2024, it ranked second in the automotivemicrocontroller (MCU) market behindInfineon Technologies, and third in the overall MCU market behindNXP Semiconductors and Infineon.
Renesas Electronics was established in April 2010 through the merger of Renesas Technology and NEC Electronics.[7] Renesas Technology had been formed in 2003 as a joint venture betweenHitachi andMitsubishi Electric, combining their non-DRAM semiconductor businesses.[4][8]NEC had earlier spun off its semiconductor division as NEC Electronics in 2002.[9][10] The companies had previously separated their DRAM operations intoElpida Memory, which filed for bankruptcy in 2012 and was acquired byMicron Technology.[11]
In December 2010, Renesas Mobile Corporation was formed by integrating Renesas’s mobile business with assets acquired fromNokia.[12] However, the company later exited the mobile sector, transferringLTE assets toBroadcom in 2013 and dissolving the subsidiary in 2014.[13][14]
The2011 Tōhoku earthquake and flooding in Thailand severely impacted Renesas’s operations.[15] A major restructuring followed, involving the sale of domestic factories and a capital infusion from theInnovation Network Corporation of Japan (INCJ), which became the company's largest shareholder in 2013.[16][17][18][19] Renesas returned to profitability in fiscal year 2013.[20]
From 2016 onward, Renesas embarked on a series of acquisitions to strengthen its automotive and industrial semiconductor portfolio. It acquiredIntersil in 2017[21] andIntegrated Device Technology (IDT) in 2019.[22][23] In 2021, it purchasedDialog Semiconductor for $5.9 billion,[24][25] followed by additional acquisitions including Celeno Communications,[26] Reality AI,[27] and Steradian Semiconductors.[28]
In March 2021, a fire at the Naka Factory temporarily disrupted production, but operations resumed the following month.[29][30] The company also reopened its Kofu fabrication facility to support power semiconductor production, with operations expected to begin in 2024.[31]
In April 2023, Renesas was added to theNikkei 225 index,[39] and in December 2022, it received the “Outstanding Asia-Pacific Semiconductor Company Award” from the Global Semiconductor Alliance.[40]
RL78 is the family name for a range of 16-bit microcontrollers. These were the first new MCU to emerge from the new Renesas Electronics company after the merger of NEC Electronics and Renesas Technology.[41] These microcontrollers incorporate the core features of the NEC 78K0R (150 nm MF2 flash process) and many familiar peripherals from legacy Renesas R8C microcontrollers. The RL78 core variants include the S1, S2, and S3 type cores which evolved from the NEC 78K0R core. The basic S1 core support 74 instructions, the S2 core addsregister banking and supports 75 instructions, while the S3 core adds an on-chip multiplier / divider /multiple-accumulate and supports 81 instructions.
The RL78 was developed to address extremely low power but highly integrated microcontroller applications,[42] to this end the core offered a novel low power mode of operation called “snooze mode”[43] where theADC orserial interface can be programmed to meet specific conditions to wake the device from the extreme low power STOP mode of 0.52uA.
The RX, an acronym for Renesas Xtreme, is the family name for a range of 32-bitmicrocontrollers developed by Renesas, as opposed to the H family and the MC family, launched by Hitachi and Mitsubishi respectively.[44][45]
The RX family was launched in 2009 by Renesas Technology with the first product range designated the RX600 series[46] and targeting applications such as metering, motor control, human–machine interfaces (HMI), networking, and industrial automation. Since 2009 this MCU family range has been enlarged with a smaller variant the RX200 series[47] and also through enhanced performance versions.
The RA, an acronym for Renesas Advanced, is the family name for a range of 32-bitmicrocontrollers with Arm Cortex processor cores.[48] The RA family's key features are the stronger embedded security, high-performance, and CoreMark ultra-low power operation. It also has a comprehensive partner ecosystem and Flexible Software Package[49] for the users.
The Renesas RZ family is a high-end 32 & 64 bitmicroprocessors[50] that is designed for the implementations of high resolution human machine interface (HMI), embedded vision, real-time control, andindustrial Ethernet connectivity.[51] It supports 6 protocols:PROFINET RT/IRT,EtherNET/IP, POWERLINK, Modbus/TCP, EtherCAT, TSN, and Sercos III.
The family includes, RZ/A and RZ/G for HMI, RZ/T for high-speed real-time control, and RZ/N for the network.[51]
At the beginning of June 2022, Renesas announced its completion of an approx. 200 billion yen worth buyback of its shares.[55]
At the end of September 2013, Renesas issued new shares through third-party allotment resulting in INCJ becoming the new largest shareholder and non-parental controlling shareholder.[56]
In early May 2012, NEC transferred part of its stake in Renesas to its employee pension trust. As a result, the NEC pension fund held 32.4 percent of Renesas while NEC had 3.0 percent.[57]
As of 2022, the in-house wafer fabrication of the semiconductor device is conducted by Renesas Electronics and Renesas Semiconductor Manufacturing, a wholly owned subsidiary, operating five front-end plants in the following areas:[64]
Naka, Takasaki, Saijo, Kawashiri, Palm Bay
The back-end facilities, directly affiliated to Renesas Electronics and its subsidiaries, are located in:[64][65]
Yonezawa, Oita, Nishiki, Beijing, Suzhou, Kuala Lumpur, Penang
In May 2022 Renesas announced the re-opening of the "Kofu"fab, which will utilize the 300mm geometry for the fabrication of power semiconductors. The facility is scheduled to be online in 2024.[31]
¥1.35 trillion (2024)[2]
¥4.49 trillion (2024)[2]
