UNISOC
Corporate brand
UnclaimedA Chinese fabless semiconductor company developing mobile, connectivity, artificial-intelligence, radio-frequency, computing and industrial IoT chipsets.
Last updated October 12, 2026
Overview
UNISOC (Shanghai) Technologies Co., Ltd., known in Chinese as Ziguang Zhanrui, is a Shanghai-based Chinese fabless semiconductor designer. The company develops integrated circuits and system-on-chip platforms rather than manufacturing wafers itself. Its principal business areas are consumer electronics and industrial electronics. Consumer-oriented products support smartphones, feature phones, tablets, smart audio equipment, smart wearables and related connected devices. Industrial applications include local-area and wide-area Internet of Things equipment, smart displays and other communication, computing and control systems. The company is the result of the consolidation of two Chinese chip-design businesses associated with Tsinghua Unigroup. Spreadtrum Communications began by developing chipsets for GSM mobile handsets and later devoted substantial resources to China's TD-SCDMA 3G standard. Its products supported GSM, GPRS, EDGE, TD-SCDMA, W-CDMA, HSPA+ and TD-LTE technologies, helping it participate in the expansion of China's domestic mobile-device ecosystem. During China Mobile's TD-SCDMA handset trials in 2008, Spreadtrum customers represented a substantial share of the handsets used in the trial program. Spreadtrum also supplied solutions associated with Chinese mobile-television standards including TD-MBMS and CMMB. Tsinghua Unigroup agreed in 2013 to acquire Spreadtrum, which at the time was a Nasdaq-listed public company. The transaction, valued at approximately US$1.78 billion according to the cited reference material, was completed in December 2013. Tsinghua Unigroup subsequently acquired RDA Microelectronics in 2014 for approximately US$907 million. RDA brought expertise in wireless system-on-chip products and radio-frequency semiconductors for cellular, connectivity and broadcast applications. In 2018, Spreadtrum and RDA were merged and rebranded as UNISOC. Intel agreed that year to invest in the combined business and was associated with work on a 5G smartphone platform using an Intel modem. UNISOC expanded from legacy handset baseband products into integrated mobile application processors, 5G platforms, artificial-intelligence acceleration, radio-frequency components and broader connectivity solutions. In 2019 it introduced the Makalu 1.0 5G technology platform and the V510 5G baseband chip. In 2020 it launched the T7520 5G smartphone system-on-chip, described in the reference material as using a 6-nanometre EUV process. The company has also maintained a proprietary real-time operating-system line, Mocor, used primarily in some 4G feature phones and related low-cost devices. UNISOC's competitive position is strongest in value-oriented smartphones, feature phones, entry and mid-range connected hardware, and markets where integrated cellular connectivity is important. The company competes with larger global processor and modem suppliers while serving device makers that require cost-sensitive platforms across multiple wireless generations. Reference material identifies UNISOC as the world's fourth-largest mobile processor manufacturer since 2021, behind MediaTek, Qualcomm and Apple, and reports a 13 percent global share in 2024. Its research and development organization is described as globally distributed, with more than 5,000 employees worldwide and approximately 90 percent engaged in research and development. Tsinghua Unigroup is identified as the company's largest shareholder.
History
UNISOC emerged from the development and consolidation of two Chinese fabless semiconductor companies, Spreadtrum Communications and RDA Microelectronics. Spreadtrum initially concentrated on chipsets for GSM mobile phones. As China's domestic mobile industry developed, the company shifted significant engineering resources toward the TD-SCDMA 3G standard, while continuing to support GSM and combined GSM/TD-SCDMA solutions. Its portfolio also included technology associated with TD-MBMS and CMMB mobile-television standards. During China Mobile's TD-SCDMA handset trials in 2008, devices using Spreadtrum customer solutions represented a substantial portion of the trial handset base. Spreadtrum later became a publicly traded company on Nasdaq. In July 2013, Tsinghua Unigroup agreed to acquire it for approximately US$1.78 billion; the deal closed on 23 December 2013. The acquisition brought Spreadtrum into the Tsinghua Unigroup structure and provided the group with a major mobile-chip design platform. In 2014, Tsinghua Unigroup acquired RDA Microelectronics for approximately US$907 million. RDA designed and marketed wireless system-on-chip and radio-frequency products for cellular communications, connectivity and broadcast uses, complementing Spreadtrum's baseband and mobile-platform capabilities. The two businesses were combined in 2018 and given the UNISOC name. The combination broadened the company's technical base from mobile application and baseband products to radio-frequency components and other wireless semiconductor technologies. Intel was reported to have invested US$1.5 billion for a 20 percent interest in the company and to have cooperated with UNISOC on a 5G smartphone platform involving an Intel modem. Around the same period, UNISOC presented higher-end smartphone system-on-chip products with augmented-reality capabilities. UNISOC's next major development phase centered on 5G. In February 2019, it introduced the Makalu 1.0 5G technology platform and the V510 5G baseband chip. In 2020, it launched the T7520, a 5G smartphone SoC described as using a 6-nanometre EUV process. These products marked an effort to move beyond the company's historical strength in basic and value-oriented handsets and into more integrated smartphone platforms. The company now describes its activities through consumer-electronics and industrial-electronics applications. Consumer products include smartphone and feature-phone platforms, tablets, smart audio, wearables and related devices. Industrial products cover LAN IoT, WAN IoT and smart displays, along with communication, computing and control applications. UNISOC supports a wide range of cellular standards, including GSM, GPRS, EDGE, TD-SCDMA, W-CDMA, HSPA+ and TD-LTE, while also developing 5G, artificial-intelligence and radio-frequency technologies. Its proprietary Mocor real-time operating system is used in some 4G feature phones and is generally deployed with a third-party kernel. Reference material describes UNISOC as having a global research-and-development footprint of more than 5,000 employees, with roughly 90 percent working in R&D. It also identifies Tsinghua Unigroup as the company's largest shareholder. Since 2021, UNISOC has been described as the world's fourth-largest mobile processor manufacturer, behind MediaTek, Qualcomm and Apple; the cited material reports a 13 percent global share in 2024. The company therefore occupies an important position in China's semiconductor ecosystem and in the global supply of cost-sensitive mobile and IoT silicon.
- 2021
UNISOC rises in China's smartphone processor market
[1]Reference material reports that UNISOC overtook HiSilicon and ranked third in Chinese smartphone application-processor market share.
- 2020
T7520 5G SoC launches
[1]UNISOC launched the T7520 5G smartphone system-on-chip, associated with a 6-nanometre EUV process.
- 2019
UNISOC enters a new 5G platform phase
[1]UNISOC introduced the Makalu 1.0 5G platform and V510 5G baseband chip.
- 2018
Spreadtrum and RDA merge to form UNISOC
[1]The two semiconductor businesses were merged and rebranded as UNISOC. Intel was also reported to have invested in the combined company.
- 2014
RDA Microelectronics joins Tsinghua Unigroup
[1]Tsinghua Unigroup acquired RDA Microelectronics for approximately US$907 million, adding wireless SoC and radio-frequency expertise.
- 2013
Tsinghua Unigroup agrees to acquire Spreadtrum
[1]Tsinghua Unigroup announced an approximately US$1.78 billion acquisition of Nasdaq-listed Spreadtrum Communications.
- 2013
Spreadtrum acquisition closes
[1]The acquisition of Spreadtrum by Tsinghua Unigroup was completed on 23 December.
- 2008
Spreadtrum supports China's TD-SCDMA handset trials
[1]Spreadtrum customer products accounted for a substantial share of the handsets used in China Mobile's TD-SCDMA trial program, demonstrating the company's role in China's early 3G handset ecosystem.
Products and positioning
A Chinese fabless chip supplier positioned around broad wireless-standard support, cost-efficient mobile platforms, 5G development and connectivity solutions for consumer and industrial electronics.
Mobile processors
Mobile system-on-chip platforms
UNISOC develops integrated mobile SoCs combining application-processing, graphics, modem and connectivity functions. These platforms serve smartphones, tablets and other mobile devices across value, entry and higher-performance segments. The product family reflects the company's expansion from basic cellular basebands into more complete computing platforms, including 5G and artificial-intelligence capabilities.
5G baseband · 2019
V510
The V510 is a 5G baseband chip introduced as part of UNISOC's Makalu 1.0 5G technology program. It represents the company's effort to provide standalone modem and platform technology for next-generation mobile networks and to extend its wireless portfolio beyond earlier GSM, 3G and LTE generations.
5G smartphone SoC · 2020
T7520
The T7520 is a 5G smartphone system-on-chip launched by UNISOC in 2020. The reference material associates it with a 6-nanometre EUV process. It combines mobile application processing and cellular connectivity in an integrated platform intended for smartphone designs.
5G technology platform · 2019
Makalu 1.0
Makalu 1.0 is a UNISOC 5G technology platform introduced alongside the V510 baseband. It provided a foundation for the company's early 5G smartphone and modem development, supporting UNISOC's transition from established 2G, 3G and 4G chipsets to next-generation mobile connectivity.
Real-time operating system
Mocor
Mocor is a proprietary real-time operating-system line developed by the Spreadtrum business and retained within UNISOC's product heritage. It is used primarily in 4G feature phones and similar low-cost devices. Mocor does not provide its own kernel and is typically used with a third-party kernel such as ThreadX.
Wireless semiconductors
Radio-frequency and connectivity chips
UNISOC supplies radio-frequency, connectivity and related wireless chips for cellular, broadcast, consumer-electronics and IoT applications. This capability was strengthened by the integration of RDA Microelectronics and complements UNISOC's modem, baseband and system-on-chip offerings.
Industrial electronics
IoT and smart-display chipsets
UNISOC's industrial-electronics portfolio covers LAN IoT, WAN IoT and smart-display applications. These products provide communication, computing and control functions for connected equipment beyond conventional smartphones and feature phones.
Controversies
Brand decisions
2020
Launch the T7520 5G smartphone SoCProduct launchBackground
UNISOC was extending its historical baseband and value-device expertise into integrated 5G smartphone platforms.
Action taken
The company launched the T7520, a 5G system-on-chip associated with a 6-nanometre EUV process.
Aftermath
The product strengthened UNISOC's positioning as a supplier of integrated 5G smartphone silicon rather than only legacy handset connectivity components.
2019
Develop an integrated 5G product roadmapProduct launchBackground
The mobile semiconductor market was moving from LTE toward 5G, requiring new modem, baseband and platform capabilities.
Action taken
UNISOC introduced the Makalu 1.0 5G platform and V510 5G baseband chip.
Aftermath
The launch established a visible 5G development track that was followed by the T7520 5G smartphone SoC in 2020.
2018
Merge Spreadtrum and RDA under the UNISOC identityStrategyBackground
The two Tsinghua Unigroup semiconductor businesses had complementary capabilities in mobile platforms, basebands, radio-frequency components and wireless connectivity.
Action taken
Spreadtrum Communications and RDA Microelectronics were merged and rebranded as UNISOC. Intel was reported to have invested in the combined company and to have cooperated on a 5G smartphone platform.
Aftermath
The combination created a broader semiconductor supplier spanning mobile SoCs, basebands, radio-frequency products, artificial-intelligence technologies and industrial connectivity.
Reported Intel investment. US$1.5 billion for a reported 20 percent stake (2018)
2014
Acquire RDA MicroelectronicsM&ABackground
Tsinghua Unigroup sought to expand its wireless semiconductor capabilities beyond Spreadtrum's mobile-chip business.
Action taken
Tsinghua Unigroup acquired RDA Microelectronics, a designer of wireless SoCs and radio-frequency semiconductors.
Aftermath
RDA's cellular, connectivity and broadcast expertise later complemented Spreadtrum in the combined UNISOC business.
Reported acquisition value. Approximately US$907 million (2014)
2013
Accept the Tsinghua Unigroup acquisitionM&ABackground
Spreadtrum was a publicly traded mobile-chip designer seeking a new ownership structure and deeper integration with a Chinese semiconductor investment group.
Action taken
Spreadtrum agreed to be acquired by Tsinghua Unigroup for approximately US$1.78 billion. The transaction closed in December 2013.
Aftermath
Spreadtrum became part of the Tsinghua Unigroup structure and later served as one of the two businesses consolidated into UNISOC.
Reported acquisition value. Approximately US$1.78 billion (2013)
Recent events
- 2021
UNISOC ranks among the leading Chinese smartphone application-processor suppliers[1]
Other
Reference material reports that UNISOC surpassed HiSilicon in Chinese smartphone application-processor share and ranked third in that market during 2021.
- 2020
UNISOC launches the T7520 5G system-on-chip[1]
Product launch · Product generation
The company launched the T7520, a 5G smartphone system-on-chip described in the reference material as using a 6-nanometre EUV manufacturing process.
- 2019
UNISOC introduces Makalu 1.0 and V510 5G technology[1]
Product launch
UNISOC introduced its Makalu 1.0 5G technology platform and the V510 5G baseband chip as part of its move into next-generation mobile connectivity.
- 2018
Spreadtrum and RDA combine under the UNISOC brand[1]
M&A
Spreadtrum Communications and RDA Microelectronics were merged and rebranded as UNISOC. Intel was reported to have agreed to invest US$1.5 billion for a 20 percent stake and to cooperate on a 5G smartphone platform.
- 2014
Tsinghua Unigroup acquires RDA Microelectronics[1]
M&A
Tsinghua Unigroup acquired RDA Microelectronics, a designer of wireless system-on-chip and radio-frequency semiconductors serving cellular, connectivity and broadcast applications.
- 2013
Tsinghua Unigroup agrees to acquire Spreadtrum Communications[1]
M&A
Tsinghua Unigroup agreed to acquire the Nasdaq-listed Spreadtrum Communications in a transaction reported at approximately US$1.78 billion. The acquisition was completed in December 2013.
Sources18 sources
- 1UNISOC - Wikipediaen.wikipedia.org
- 2股东“暗斗”与股权代持争议m.caixin.com
- 3股东“暗斗”与股权代持争议yicai.com
- 4股东“暗斗”与股权代持争议thepaper.cn
- 5不止有5G SoC！紫光展锐还发布了这些AIoT新品tech.sina.com.cn
- 6四大优势 展锐推出第三代Wi-Fi 5 芯片平台 春藤5623chinaz.com
- 7四大优势 展锐推出第三代Wi-Fi 5 芯片平台 春藤5623itbear.com.cn
- 8中国联通5G CPE重磅推出 搭载紫光展锐5G芯片net.it168.com
- 9紫光展锐5G样机通过泰尔实验室认证digi.hsw.cn
- 10紫光展锐5G样机通过泰尔实验室认证：搭载自研虎贲T710+春藤510芯片tech.sina.com.cn
- 11紫光展锐发布全新AIoT解决方案春藤V5663：找不到对手tech.sina.com.cn
- 12紫光展锐发布全新AIoT解决方案春藤V5663：找不到对手tech.sina.com.cn
- 13紫光展锐发布新一代5G芯片虎贲T7520 采用6nm工艺tech.sina.com.cn
- 14紫光展锐推出第三代Wi-Fi 5 (11ac) 智慧家庭专属解决方案—春藤5623tech.sina.com.cn
- 15AIoT时代的又一解决方案 紫光展锐正式推出V5663tech.sina.com.cn
- 16UNISOC Rolls Out its Third-Generation Wi-Fi 5 (11ac)-Based Solution IVY5623 for Smart Home Applications - Technutertechnuter.com
- 17UNISOC Technologies Co.,Ltd: China Unicom Launches 5G CPE; Powered by UNISOC V510finanznachrichten.de
- 18UNISOC unveils new chipset to strengthen 4G portfoliobusiness-standard.com
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