Renesas Electronics

Last updated
Renesas Electronics Corporation
Native name
ルネサス エレクトロニクス株式会社
Type Public (KK)
TYO: 6723
Industry Semiconductor
Predecessor NEC Electronics, Renesas Technology (chip units of Hitachi and Mitsubishi)
FoundedNovember 1, 2002;18 years ago (2002-11-01) as Renesas Technology
April 1, 2010;11 years ago (2010-04-01) as Renesas Electronics
Key people
Hidetoshi Shibata (Representative Director, President and CEO)
Tetsuya Tsurumaru (Representative Director and Chairman) [1]
Products Semiconductors
Number of employees
19,546 (Consolidated, as of December 31, 2018) [2]

Renesas Electronics Corporation (ルネサス エレクトロニクス株式会社, Runesasu Erekutoronikusu Kabushiki Gaisha) is a Japanese semiconductor manufacturer headquartered in Tokyo, Japan, initially incorporated in 2002 as Renesas Technology, the consolidated entity of the semiconductor units of Hitachi and Mitsubishi excluding their dynamic random-access memory businesses, [3] to which NEC Electronics merged in 2010, resulting in a minor change in the corporate name and logo to as it is now. [4]


In the 2000s to early 2010s, Renesas had been one of the six largest semiconductor companies in the world. [5] As of 2014, it was the world's largest automotive semiconductor maker, [6] and the world's largest maker of microcontrollers. The company also has presences in the markets of analogue and mixed-signal integrated circuits, memory devices, and SoCs.

The brand Renesas is a contraction of "RenaissanceSemiconductor for Advanced Solutions". [3]


Renesas Electronics started operation in April 2010, through the integration of NEC Electronics, established in November 2002 as a spin-off of the semiconductor operations of NEC with the exception of the DRAM business, [7] [8] and Renesas Technology established on April 1, 2003, the non-DRAM chip joint venture of Hitachi and Mitsubishi, with their ownership percentage of 55 and 45 in order. [9] The DRAM businesses of the three had become part of Elpida Memory, which went bankrupt in 2012 before being acquired by Micron Technology. [10]

A basic agreement to merge was reached by April 2010 and materialized on the first day, forming the fourth largest semiconductor company by revenue according to an estimation from iSuppli. [11]

In December 2010, Renesas Mobile Corporation (RMC) was created by integrating the Mobile Multimedia Business Unit of Renesas with the acquired Nokia Wireless Modem Business Unit. [12]

In 2011, Renesas Electronics was adversely affected by the 2011 Tōhoku earthquake and tsunami [13] and flooding in Thailand. In 2012, the company, which had about 50 thousand employees of manufacturing, design and sales operations in about 20 countries in 2011, [14] decided to restructure its business, including the sale and consolidation of its Japanese domestic plants, to become profitable. [15] [16] In December 2012, INCJ, a Japanese public-private fund, and several key clients decided to invest in the company.[ citation needed ] Through the investment, Renesas aimed to secure 150 billion yen as fresh capital by September 2013 and make use of it for investment in development of the microcontroller and analog and power chips for automotive and industrial uses, plant improvements, and corporate acquisitions.[ citation needed ]

In January 2013, Renesas transferred some of its back-end plants to J-Devices. [17]

In September 2013, Broadcom acquired most of Renesas Mobile Communication. [18]

With the allotment of third-party shares to the nine investors completed in September 2013, INCJ became the largest shareholder in the company. [19] Renesas announced its new business direction and issued its corporate presentation titled "Reforming Renesas” in October 2013. [20]

In the fiscal year ended in March 2014, Renesas recorded its first ever net profit since it started operation as Renesas Electronics Corporation in 2010. [21]

Renesas Silicon Valley offices in the San Jose, California. Renesas Silicon Valley Offices in the Edenvale district of San Jose, California 2012.jpg
Renesas Silicon Valley offices in the San Jose, California.

In July 2014, the subsidiary Renesas Mobile Communication was consolidated, after the company had decided to withdraw from the 4G wireless business. [22]

In September 2014, the sale of the display driver IC unit of Renesas to Synaptics was completed. [23]

In September 2016, Renesas announced that it would acquire Intersil for $3.2 billion. [24] In February 2017, Renesas completed the acquisition. [25]

In April 2017, Renesas unveiled a self-driving concept car at a global developer conference, stating that it will start delivering a new line of products for self-driving cars in December 2017, as it takes on global giants such as Intel. The new technology acts as an onboard nerve center, coordinating and controlling vehicle functions. [26]

In September 2018, Renesas announced that it has agreed to buy Integrated Device Technology for $6.7 billion. [27] The acquisition was completed in March 2019. [28]

In 2020, Renesas announced its plans to wind down its production of diodes and the compound device. [29]

In February 2021, Renesas announced that it has agreed to buy Dialog Semiconductor for $5.9 billion. [30] The acquisition was completed in September 2021. [31]

In March 2021, a fire at a factory owned by a subsidiary of Renesas caused significant damage to equipment. [32] Renesas said that it would take at least a month to restart the damaged operations. [32]


The offerings of Renesas Electronics include:


The RX MCU family

The RX, an acronym for Renesas Xtreme, is the family name for a range of 32-bit microcontrollers developed by Renesas, as opposed to the H family and the MC family, launched by Hitachi and Mitsubishi respectively. [35] [36]

The RX family was launched in 2009 by Renesas Technology with the first product range designated the RX600 series 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 and also through enhanced performance versions.

Key to the high performance of the microcontroller is the CISC architecture with high performance integrated flash memory enabling the central processing unit (CPU) to operate at very high frequency, 100 MHz, without requiring wait-states for the memory accesses resulting in performance up to 1.65 DMIPS/MHz.

The RA MCU family

The RA, an acronym for Renesas Advanced, is the family name for a range of 32-bit microcontrollers with Arm Cortex processor cores. 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 [37] for the users.

MCU Family Specifications
FamilyCPUOperating FrequencyProgram Memory (KB)Data Flash (KB)RAM (KB)Lead CountSupply Voltage







32, 64, 128, 256, 384, 512,

768, 1024, 2048

4, 8, 32, 6316, 32, 64, 96, 128

256, 384, 640

25, 32, 36, 40, 48

56, 64, 80, 100

144, 145 176

1.6 - 5.5

1.8 - 3.6

2.7 - 3.6

2.7 - 3.7


The RZ Arm-based 32 & 64-bit family

The Renesas RZ family is a high-end 32 & 64 bit microprocessors that is designed for the implementations of high resolution human machine interface (HMI), embedded vision, embedded artificial intelligence (e-AI), real-time control, and industrial ethernet connectivity. [38] It supports 6 protocols: PROFINET, EtherNET/IP, POWERLINK, Modbus/TCP, EtherCAT, 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. [38]

MPU Family Specifications
FamilyBIt SizeRAM (KB)CPULead Count (#)Supply VoltageMax Operating Frequency (Mhz)


128 ~ 10240Cortex-A15










112, 176, 196

208, 233, 256, 272,

320, 324, 361, 400,

456, 501, 551, 552,

831, 841, 1022

3 - 3.6125 ~ 1500

Corporate affairs

The largest stockholders and their ownership ratio of Renesas are as follows as of December 31, 2018. [39] [40] [41]

Innovation Network Corporation of Japan 33.37%
GIC Private Limited -C5.79%
Denso 4.99%
Mitsubishi Electric 4.53%
Japan Trustee Services Bank

(Re-trust of Sumitomo Mitsui Trust Bank, Limited /

NEC Corporation pension and severance payments Trust Account)


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. [42]

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. [43]

Manufacturing sites

As of 2021, the in-house wafer fabrication of the semiconductor device is conducted by Renesas Semiconductor Manufacturing, a wholly owned subsidiary operating six front-end plants in the following areas: [44]

The back-end facilities, directly affiliated to Renesas Electronics, are located in: [44]

Related Research Articles

SuperH is a 32-bit reduced instruction set computing (RISC) instruction set architecture (ISA) developed by Hitachi and currently produced by Renesas. It is implemented by microcontrollers and microprocessors for embedded systems.

Hitachi Japanese multinational engineering and electronics company

Hitachi, Ltd. is a Japanese multinational conglomerate corporation headquartered in Chiyoda, Tokyo, Japan. It is the parent company of the Hitachi Group and had formed part of the Nissan zaibatsu and later DKB Group and Fuyo Group of companies before DKB and Fuji Bank merged into the Mizuho Financial Group. As of 2020, Hitachi conducts business ranging from IT, including AI, the Internet of Things, and big data, to infrastructure.

NEC Japanese technology corporation

NEC Corporation is a Japanese multinational information technology and electronics corporation, headquartered in Minato, Tokyo. The company was known as the Nippon Electric Company, Limited, before rebranding in 1983 as NEC. It provides IT and network solutions, including cloud computing, AI, IoT platform, and telecommunications equipment and software, to business enterprises, communications services providers and to government agencies, and has also been the biggest PC vendor in Japan since the 1980s, when it launched the PC-8000 series.

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Cypress Semiconductor American semiconductor company.

Cypress Semiconductor Corporation is an American semiconductor design and manufacturing company, and is now a subsidiary of Infineon Technologies. It offered NOR flash memories, F-RAM and SRAM Traveo microcontrollers, the industry's only PSoC programmable system-on-chip solutions, analog and PMIC Power Management ICs, CapSense capacitive touch-sensing controllers, Wireless BLE Bluetooth Low-Energy and USB connectivity solutions.

Infineon Technologies Semiconductor manufacturing company

Infineon Technologies AG is a German semiconductor manufacturer founded in 1999, when the semiconductor operations of the former parent company Siemens AG were spun off. Infineon has about 46,665 employees and is one of the ten largest semiconductor manufacturers worldwide. It is market leader in automotive and power semiconductors. In fiscal year 2020, the company achieved sales of €8.6 billion. Infineon bought Cypress in April 2020.

Semiconductor industry Industry

The semiconductor industry is the aggregate of companies engaged in the design and fabrication of semiconductors and semiconductor devices, such as integrated circuits. It formed around 1960, once the fabrication of semiconductor devices became a viable business. The industry's annual semiconductor sales revenue has since grown to over $481 billion, as of 2018. The semiconductor industry is in turn the driving force behind the wider electronics industry, with annual power electronics sales of £135 billion as of 2011, annual consumer electronics sales expected to reach $2.9 trillion by 2020, tech industry sales expected to reach $5 trillion in 2019, and e-commerce with over $29 trillion in 2017.

An integrated device manufacturer (IDM) is a semiconductor company which designs, manufactures, and sells integrated circuit (IC) products. As a classification, IDM is often used to differentiate between a company which handles semiconductor manufacturing in-house, and a fabless semiconductor company, which outsources production to a third-party. Due to the dynamic nature of the semiconductor industry, the term IDM has become less accurate than when it was coined.

Intersil is an American semiconductor company headquartered in Milpitas, California. As of February 24, 2017, Intersil is a subsidiary of Renesas. The previous Intersil was formed in August 1999 through the acquisition of the semiconductor business of Harris Corporation. Intersil is a power management IC business, with specialized capability in power management and precision analog technology for applications in industrial, infrastructure, mobile, automotive and aerospace.

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V850 is a 32-bit RISC CPU architecture produced by Renesas Electronics for embedded microcontrollers. It was designed by NEC as a replacement for their earlier NEC V60 family, and introduced shortly before NEC sold their designs to Renesas in the early 1990s. It continues to be developed by Renesas as of 2018.

Microchip Technology American integrated circuit company

Microchip Technology Inc. is a publicly-listed American corporation that manufactures microcontroller, mixed-signal, analog and Flash-IP integrated circuits. Its products include microcontrollers, Serial EEPROM devices, Serial SRAM devices, embedded security devices, radio frequency (RF) devices, thermal, power and battery management analog devices, as well as linear, interface and wireless products.

IEBus Communication bus specification

IEBus is a communication bus specification "between equipments within a vehicle or a chassis" of Renesas Electronics. It defines OSI model layer 1 and layer 2 specification. IEBus is mainly used for car audio and car navigations, which established de facto standard in Japan, though SAE J1850 is major in United States.
IEBus is also used in some vending machines, which major customer is Fuji Electric. Each button on the vending machine has an IEBus ID, i.e. has a controller.
Detailed specification is disclosed to licensees only, but protocol analyzers are provided from some test equipment vendors. Its modulation method is PWM with 6.00 MHz base clock originally, but most of automotive customers use 6.291 MHz, and physical layer is a pair of differential signalling harness. Its physical layer adopts half-duplex, asynchronous, and multi-master communication with CSMA/CD for access control. It allows for up to fifty units on one bus over a maximum length of 150 meters. Two differential signalling lines are used with Bus+ / Bus− naming, sometimes labeled as Data(+) / Data(−).

NXP Semiconductors Dutch semiconductor manufacturer

NXP Semiconductors N.V. is a Dutch semiconductor manufacturer with headquarters in Eindhoven, Netherlands that focuses in the automotive industry. The company employs approximately 31,000 people in more than 35 countries, including 11,200 engineers in 33 countries. NXP reported revenue of $9.4 billion in 2018.

ON Semiconductor American integrated circuit manufacturer

ON Semiconductor is a semiconductor supplier company, formerly in the Fortune 500, but dropping into the Fortune 1000 in 2020. 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. ON Semiconductor runs a network of manufacturing facilities, sales offices and design centers in North America, Europe, and the Asia Pacific regions. Headquartered in Phoenix, Arizona, ON Semiconductor has revenues of $3.907 billion (2016), which puts it among the worldwide top 20 semiconductor sales leaders.

Elpida Memory, Inc. was a corporation established in 1999 that developed, designed, manufactured and sold dynamic random-access memory (DRAM) products. It was also a semiconductor foundry. With headquarters in Yaesu, Chūō, Tokyo, Japan, it was initially formed under the name NEC Hitachi Memory in 1999 by the merger of the Hitachi and NEC DRAM businesses. In the following year it took on the name Elpida. In 2003, Elpida took over the Mitsubishi DRAM business. In 2004, it listed its shares in the first section of the Tokyo Stock Exchange. In 2012, those shares were delisted as a result of its bankruptcy. In 2013, Elpida was acquired by Micron Technology.

The Mitsubishi 740, also known as MELPS 740, is a series of 8-bit CMOS microcontrollers and microprocessors with an enhanced MOS Technology 6502 compatible core based on the expanded WDC 65C02. The ICs were manufactured by Mitsubishi Electric during the 1980s and 1990s.

Integrated Device Technology U.S. semiconductor manufacturer

Integrated Device Technology, Inc. is an American corporation headquartered in San Jose, California, that designs, manufactures, and markets low-power, high-performance mixed-signal semiconductor solutions for the advanced communications, computing, and consumer industries. The company markets its products primarily to original equipment manufacturers (OEMs). Founded in 1980, the company began as a provider of complementary metal-oxide semiconductors (CMOS) for the communications business segment and computing business segments. The company is focused on three major areas: communications infrastructure, high-performance computing, and advanced power management.

RL78 Family is a 16-bit CPU core for embedded microcontrollers of Renesas Electronics introduced in 2010.


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