Inphi Corporation
Corporate brand
UnclaimedInphi Corporation was an American semiconductor company specializing in high-speed analog, mixed-signal, optical, and networking components for data-center and communications infrastructure.
Last updated August 26, 2026
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Overview
Inphi Corporation was a United States semiconductor company focused on the high-speed communications layer linking optical networks, data centers, cloud platforms, and telecommunications systems. Founded in 2000 by Gopal Raghavan, Tim Semones, and Loi Nguyen, the company developed analog and mixed-signal integrated circuits, digital signal processors, optical physical-layer devices, silicon-photonic subsystems, and related components used by networking original equipment manufacturers, optical-module makers, cloud-service providers, and telecom operators. The company’s technology portfolio addressed the conversion, conditioning, transmission, and reception of high-bandwidth signals. Its products included linear transimpedance amplifiers, modulator drivers, retimers, gearboxes, optical physical-layer devices, coherent digital signal processors, PAM4 solutions, and optical subsystems. These products were used in long-haul and metro optical networks, data-center interconnects, connections within data centers, 5G infrastructure, access networks, and cable systems. Rather than selling finished consumer products, Inphi supplied enabling semiconductor technology and optical solutions that were integrated into networking equipment and modules. Inphi expanded through a series of acquisitions. In 2014 it bought selected businesses from Cortina Systems, adding high-speed interconnect and optical-transport capabilities. In 2016 it sold its memory business to Rambus, concentrating the company more tightly on communications and optical connectivity. Later that year, it acquired ClariPhy Communications, strengthening its coherent optical digital-signal-processing portfolio. In 2019 Inphi and Synopsys announced the acquisition of eSilicon, adding custom-silicon design, SerDes, and advanced packaging capabilities to Inphi’s portfolio. The company continued to move toward higher data rates as cloud computing and data-center traffic increased. In February 2020, Inphi announced an 800 Gbps PAM4 electro-optics platform, positioning the company around the next generation of high-capacity optical links. Its named product families included COLORZ optical solutions, Polaris 200G PAM4 DSP, Vega PAM4 FEC gearbox retimer, Porrima 400G PAM4 DSP, Spica 800G DSP, PAM4 silicon, and dense wavelength-division multiplexing optical modules. In October 2020, Marvell Technology announced an agreement to acquire Inphi for approximately $8.2 billion. The transaction was completed on April 20, 2021. After the acquisition, Inphi ceased to operate as an independent publicly traded company and its technologies became part of Marvell’s data-center and optical-connectivity portfolio. The Inphi name therefore primarily represents a predecessor technology business and product heritage within Marvell rather than a current standalone corporation.
History
Inphi Corporation was established in 2000 by Gopal Raghavan, Tim Semones, and Loi Nguyen. Its original objective was to develop high-speed analog, digital-signal-processing, and optical semiconductor technologies for cloud-service providers, telecommunications companies, and communications-equipment manufacturers. The company operated in a specialized portion of the semiconductor industry: it supplied components that helped networking systems move, recover, convert, and process high-speed electrical and optical signals. During its development, Inphi built a portfolio around optical physical-layer devices, linear transimpedance amplifiers, modulator drivers, coherent DSPs, PAM4 technology, retimers, gearboxes, and silicon-photonic subsystems. These technologies supported long-haul and metro optical networks, data-center interconnects, links inside data centers, 5G, access networks, and cable infrastructure. Its customers and channel partners included networking original equipment manufacturers, optical-module suppliers, cloud operators, and telecom service providers. A major expansion occurred on July 30, 2014, when Inphi completed the acquisition of selected Cortina Systems businesses. The transaction added high-speed interconnect and optical-transport product lines, allowing Inphi to address a wider range of communications-system requirements. In August 2016, Inphi completed the sale of its memory product business to Rambus for $90 million in cash. This divestiture reduced exposure to memory-related products and reinforced a strategic concentration on communications, optical networking, and data-center connectivity. In December 2016, Inphi acquired ClariPhy Communications for $277 million in cash. ClariPhy contributed coherent optical DSP expertise, an important capability as service providers and data-center operators required greater transmission capacity over existing fiber infrastructure. The acquisition strengthened Inphi’s position in optical transport and high-capacity networking applications. On November 11, 2019, Inphi and Synopsys announced the acquisition of eSilicon. Inphi paid $216 million through a combination of cash and assumed debt. The transaction added custom-silicon design, SerDes, and 2.5D packaging capabilities. These additions complemented Inphi’s communications-semiconductor products by improving its ability to support complex, highly integrated networking and data-center designs. In February 2020, Inphi announced what it described as an 800 Gbps PAM4 electro-optics platform. The announcement reflected the industry’s shift toward higher-speed links driven by cloud computing, artificial-intelligence workloads, and expanding data-center traffic. Inphi’s product families at this stage included COLORZ, Polaris 200G PAM4 DSP, Vega PAM4 FEC gearbox retimer, Porrima 400G PAM4 DSP, Spica 800G DSP, PAM4 silicon, and DWDM optical modules. In October 2020, Marvell Technology announced that it would acquire Inphi in a transaction valued at approximately $8.2 billion. The acquisition was completed on April 20, 2021. Inphi subsequently became part of Marvell, and the standalone Inphi corporate entity and public-market identity ended. Its technology and product heritage continued within Marvell’s broader portfolio for data-center, optical, and communications infrastructure.
- 2021
Acquired by Marvell Technology
[1]Marvell completed its acquisition of Inphi on April 20, 2021, ending Inphi’s independent corporate status.
- 2020
800 Gbps PAM4 platform announced
[1]Inphi announced an 800 Gbps PAM4 electro-optics platform for high-capacity optical connectivity.
- 2019
eSilicon acquisition announced
[1]Inphi and Synopsys announced the acquisition of eSilicon, adding SerDes, custom silicon, and 2.5D packaging capabilities.
- 2016
Memory business sold to Rambus
[1]Inphi sold its memory product business to Rambus for $90 million in cash.
- 2016
ClariPhy Communications acquired
[1]Inphi acquired ClariPhy Communications for $277 million in cash, adding coherent optical DSP capabilities.
- 2014
Cortina Systems business acquisition completed
[1]Inphi completed the acquisition of Cortina Systems’ high-speed interconnect and optical-transport product lines.
- 2000
Inphi is founded
[1]Gopal Raghavan, Tim Semones, and Loi Nguyen founded Inphi to develop high-speed analog, DSP, and optical semiconductor solutions for cloud and communications markets.
Products and positioning
A specialist semiconductor and optical-connectivity supplier for high-bandwidth cloud, data-center, telecom, cable, and 5G infrastructure. Inphi positioned itself as an enabling technology provider rather than a consumer-facing electronics brand, emphasizing signal integrity, optical transmission capacity, advanced modulation, coherent processing, and integration for networking equipment manufacturers and service providers.
Optical networking
COLORZ
COLORZ was an Inphi optical solution family for high-capacity data-center and network interconnection. It represented the company’s effort to combine optical transmission capabilities into deployable solutions for service-provider and data-center environments.
PAM4 digital signal processor
Polaris
Polaris was a 200G PAM4 DSP product family designed to support high-speed optical and electrical data transmission. It addressed the signal-processing requirements of networking equipment and optical modules operating at rising data rates.
PAM4 FEC gearbox retimer
Vega
Vega combined PAM4-related forward-error-correction and gearbox-retimer functions for high-speed interconnect applications. The product was intended to help networking systems manage signal conversion, conditioning, and link reliability.
400G PAM4 DSP
Porrima
Porrima was a 400G PAM4 digital signal processor aimed at high-bandwidth optical communications. It supported the industry transition toward 400G data-center and telecom connections.
800G DSP
Spica
Spica was an 800G DSP family associated with Inphi’s push into next-generation optical connectivity. It was designed for systems requiring increased bandwidth density in cloud, data-center, and communications networks.
Optical communications semiconductor
Coherent optical DSPs
Inphi’s coherent DSP products processed optical signals used in long-haul and metro networks. The portfolio was strengthened by the acquisition of ClariPhy Communications and supported higher-capacity transmission over optical-fiber infrastructure.
High-speed signaling semiconductor
PAM4 silicon
Inphi developed PAM4 silicon for high-speed communications links. PAM4 enables more bits to be transmitted per signaling event than traditional two-level signaling, making it useful for increasing data rates while working within practical channel and power constraints.
Brand decisions
2020
800 Gbps PAM4 electro-optics platformProduct launchBackground
Cloud services, data centers, and communications networks were demanding higher-capacity interconnects and more efficient optical transmission.
Action taken
Inphi announced an 800 Gbps PAM4 electro-optics platform.
Aftermath
The announcement positioned Inphi around emerging 800G optical-connectivity requirements.
2020
Agreement to be acquired by Marvell TechnologyM&ABackground
Inphi’s optical and data-center connectivity technologies were strategically relevant to Marvell’s expansion in data-center and communications infrastructure.
Action taken
Marvell Technology announced an agreement to acquire Inphi for approximately $8.2 billion.
Aftermath
The acquisition closed in April 2021, and Inphi became part of Marvell rather than continuing as an independent company.
Announced transaction value. Approximately $8.2 billion (October 2020 announcement; completed April 20, 2021)
2019
Acquisition of eSiliconM&ABackground
Inphi sought to broaden its semiconductor design and advanced-packaging capabilities alongside its established communications products.
Action taken
Inphi and Synopsys announced the acquisition of eSilicon. Inphi paid $216 million through cash and assumed debt.
Aftermath
The transaction added 2.5D packaging, SerDes, and custom-silicon design capabilities to Inphi’s portfolio.
Consideration paid by Inphi. $216 million in cash and assumed debt (November 2019)
2016
Exit from the memory product businessStrategyBackground
Inphi’s portfolio included both memory-related and communications-oriented products, while its principal growth focus was increasingly associated with optical and high-speed networking infrastructure.
Action taken
The company sold its memory product business to Rambus for $90 million in cash.
Aftermath
The transaction concentrated Inphi’s business on optical, communications, and data-center connectivity technologies.
Transaction value. $90 million cash proceeds (August 2016)
2016
Acquisition of ClariPhy CommunicationsM&ABackground
Higher-capacity optical networks required increasingly sophisticated coherent digital-signal-processing technology.
Action taken
Inphi acquired ClariPhy Communications for $277 million in cash.
Aftermath
The acquisition expanded Inphi’s coherent optical DSP capabilities and strengthened its optical-transport portfolio.
Acquisition consideration. $277 million cash (December 2016)
Recent events
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