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Microsemi

Microsemi Corporation was an American semiconductor manufacturer specializing in high-performance analog mixed-signal integrated circuits, field-programmable gate arrays (FPGAs), systems-on-chip (SoCs), application-specific integrated circuits (ASICs), power management solutions, timing and synchronization devices, radio frequency (RF) solutions, Ethernet and Power over Ethernet (PoE) integrated circuits, and enterprise storage technologies. Founded in 1959 and originally incorporated as Microsemiconductor Corporation in Delaware in 1960 (with its name changed to Microsemi in 1983), the company was headquartered in Aliso Viejo, California, and developed expertise in space solutions dating back to the late 1950s. Microsemi provided custom design capabilities and served key markets including aerospace and defense, communications, data centers, automotive, and industrial sectors, where it was recognized for leading-edge, high-reliability solutions and precise timekeeping technologies that set global standards. As a publicly traded company on under the ticker MSCC, Microsemi grew through numerous acquisitions and innovations over five decades, establishing itself as a key player in secure and connected embedded systems. In March 2018, announced its intent to acquire Microsemi for approximately $10.15 billion, a deal that was completed on May 29, 2018, integrating Microsemi's portfolio into Microchip's offerings for enhanced solutions in smart, connected, and secure embedded control. Following the acquisition, Microsemi was fully integrated into , with its products and services continuing to support critical applications in high-reliability environments.

History

Founding and early years (1959–1970)

Microsemi was founded on February 26, 1959, in , by Arthur Feldon and Steve Manning under the name Microsemiconductor, initially operating as a supplier of rectifier diodes. The company targeted high-reliability components essential for demanding environments, with an early emphasis on diodes designed for military and aerospace applications where failure could have severe consequences. In the early , Microsemiconductor secured its first major U.S. , establishing itself as the initial supplier qualified by services to meet the highest reliability specifications under standards like MIL-PRF-19500. This milestone solidified the company's reputation for producing robust semiconductors capable of withstanding extreme conditions in defense systems, such as those used in missiles and . The not only provided a stable revenue stream but also drove internal processes to prioritize quality and testing protocols that became industry benchmarks for high-reliability parts. Throughout the , Microsemiconductor expanded beyond basic rectifier diodes into rectifiers and semiconductors, broadening its portfolio to address growing needs in conversion and for military electronics. These developments allowed the company to scale production while maintaining a focus on hermetically sealed, voidless-glass constructions that enhanced durability in harsh operational settings. By the decade's end, this growth positioned Microsemiconductor as a key player in specialized supply. In November 1969, Microsemiconductor merged with Standard Resources Corp., a move that integrated complementary resources and formed a foundational structure for future operations, though the entity retained the Microsemiconductor name initially. This merger, approved under exemptions for regulations, provided capital and strategic stability amid the evolving landscape.

Expansion under Philip Frey Jr. (1971–2000)

In 1971, following a period of internal leadership transitions and the spin-off of its operations, Frey Jr. was appointed President and of Microsemiconductor, bringing expertise from Teledyne Inc. to stabilize and guide the company's focus on defense-related production. Under Frey's direction, the firm prioritized operational scaling and market positioning in high-reliability components for military applications, marking a shift from the unstable early years toward structured growth. A key early expansion occurred in 1972, when the company relocated from Culver City to larger facilities in , to support increased manufacturing capacity and workforce expansion amid rising demand for diodes and related devices. This move facilitated the company's evolution, culminating in its renaming to Microsemi Corporation in February 1983, a change that reflected prior mergers and a broader scope beyond semiconductors alone. Throughout the and , Microsemi diversified into mixed-signal integrated circuits and RF components, leveraging its analog expertise to address needs in and communications systems while maintaining a strong defense orientation. Financial growth accelerated under Frey, with revenues reaching $88.7 million in fiscal 1992, primarily from contracts that accounted for the majority of sales. By the late , annual revenues approached $100 million, underscoring the impact of diversification and operational efficiencies. Frey also laid the groundwork for inorganic expansion by initiating acquisitions, such as the 1982 purchase of the Components Group in , which enhanced Microsemi's portfolio in power and discrete semiconductors for uses.

Growth under James J. Peterson (2000–2018)

In November 2000, James J. Peterson was promoted to president and chief executive officer of Microsemi Corporation, succeeding Philip Frey Jr., and marking a strategic pivot toward high-growth areas in analog and mixed-signal semiconductors for demanding applications. Under Peterson's leadership, the company, already listed on under the ticker MSCC since 1990, focused on expanding its portfolio in high-reliability semiconductors, leveraging public market access to fund aggressive growth initiatives. This shift emphasized markets such as , , and communications, where Microsemi's expertise in radiation-hardened and power-efficient components provided a competitive edge. Peterson's tenure saw substantial revenue expansion, with annual sales rising from $238.8 million in 2000 to a record $1.8 billion in the 12 months ending September 2017, primarily fueled by strong demand in and communications sectors. The growth was driven by organic development and strategic positioning in emerging technologies, including an increased emphasis on field-programmable gate arrays (FPGAs) following the 2010 acquisition of Corporation for $430 million, which bolstered Microsemi's offerings in low-power, secure FPGAs for industrial and networking uses. By the mid-2010s, the company had entered high-potential markets like data centers—through FPGA-based acceleration and timing solutions—and 5G infrastructure, launching scalable fronthaul timing products in 2017 to support next-generation mobile networks with precise capabilities. As Microsemi approached its eventual acquisition, its market positioning strengthened, with shares closing at approximately $53.46 in December 2017 amid robust earnings reports. In early , the stock climbed to around $64 per share ahead of the March acquisition announcement by , reflecting investor confidence in Microsemi's diversified revenue streams—over 50% from communications and data centers by then—and its leadership in secure, high-performance semiconductors for defense and applications. This period solidified Microsemi's valuation at over $8 billion in equity, culminating in the $10.15 billion deal.

Acquisition by Microchip Technology and integration (2018–present)

On March 1, 2018, announced its agreement to acquire Microsemi Corporation in an all-cash transaction valued at $68.78 per share, representing a total equity value of approximately $8.35 billion and an enterprise value of $10.15 billion including debt. The deal was unanimously approved by the boards of both companies and aimed to enhance Microchip's portfolio in high-growth areas such as , , and communications. The acquisition was completed on May 29, 2018, following approval by Microsemi shareholders and regulatory clearances, with approximately 99.5% of votes in favor. Upon closing, Microsemi became a wholly owned of Microchip, and its ceased trading on the , effectively delisting the company from public markets. Post-acquisition integration began immediately, with Microchip merging Microsemi's product portfolio into its broader offerings between 2018 and 2020, particularly emphasizing the incorporation of Microsemi's field-programmable gate arrays (FPGAs) and system-on-chips (SoCs) into Microchip's lineup. This period focused on streamlining operations and realizing cost synergies estimated at up to $300 million annually by the third year, including optimizations in manufacturing and supply chain processes. From 2021 to 2023, integration efforts extended to supply chain enhancements amid post-COVID disruptions, leveraging combined resources to improve resilience and efficiency in global sourcing and production. By 2024 and into 2025, Microchip continued robust support for former Microsemi FPGA technologies under its own branding, releasing updates such as the Libero SoC Design Suite version 2025.1 to maintain compatibility and innovation in these areas. The acquisition significantly expanded Microchip's presence in the , where Microsemi contributed over 50% of its pre-deal revenue, elevating the combined entity's to approximately 28% of total net sales by fiscal year 2021 and sustaining growth to around 18% by fiscal year 2024 amid market recoveries. Workforce integration combined Microsemi's approximately 4,800 employees with Microchip's existing staff, resulting in a total of more than 18,500 employees by late 2018. As of 2025, the Microsemi brand has been largely phased out, with its products and technologies fully rebranded and integrated under Microchip, though legacy Microsemi solutions continue to be maintained and supported for ongoing contracts to ensure and reliability in critical applications. Microchip's -related awards, including multiple U.S. Department of Defense contracts in 2024 and 2025, underscore the sustained value of these integrated technologies.

Products and Technologies

Field-Programmable Gate Arrays (FPGAs) and System-on-Chips (SoCs)

Microsemi's field-programmable gate arrays (FPGAs) and system-on-chips (SoCs) are renowned for their low-power consumption, high reliability, and security features, making them suitable for demanding environments such as and . The portfolio includes several key families, starting with the series, which targets portable and power-conscious electronics with densities up to 35,000 logic elements (LEs) and user I/Os reaching 620, while achieving static power as low as 2 µW in Flash*Freeze mode for rapid low-power state transitions in under 1 µs. The ProASIC3 family complements this with nonvolatile Flash-based architecture supporting 100 to 35,000 LEs, system performance up to 350 MHz, and quiescent power between 0.49 mW and 3 mW, including integrated Cortex-M1 soft processor cores without licensing fees. Building on these foundations, the PolarFire family represents mid-range FPGAs with 48,000 to 481,000 LEs, integrated 12.7 Gbps transceivers, and support for interfaces like DDR4 and PCIe, while delivering up to 50% lower total power (static and dynamic) compared to equivalent SRAM-based competitors, alongside best-in-class hardened IP such as AES-256 and SHA-256. For integration, the SmartFusion2 series combines a fourth-generation Flash-based FPGA fabric with a hard Cortex-M3 processor core running at up to 166 MHz, embedded peripherals including a multi-channel , and advanced elements like SRAM physically unclonable functions (PUFs) and generators (RNGs), enabling total system power reductions of 20–40% in applications requiring processing. A hallmark of Microsemi's offerings is their radiation-hardened designs, critical for space and harsh environments, with families like RT PolarFire SoCs featuring a five-core RISC-V microprocessor subsystem (including quad-core 64-bit application processors) and up to 461,000 LEs that are single-event upset (SEU)-immune and qualified for QML Class V standards, alongside RTG4 FPGAs providing up to 150,000 LEs with 3.125 Gbps SerDes for high-speed data handling in low-Earth orbit missions. Similarly, RT ProASIC3 variants offer reprogrammable, nonvolatile logic with SEU immunity and instant-on configuration, supporting military-grade operation from -55°C to 125°C. These features extend to integrated ARM cores in SoCs, where the Cortex-M3 enables deterministic processing with memory protection units and trace macrocells, enhancing security against cloning and overbuilding in safety-critical systems. In applications, Microsemi's FPGAs and SoCs excel in defense systems for software-defined radios and sensor processing, avionics for flight-critical with hot-swapping and cold-sparing capabilities, and secure communications via built-in encryption for and interfaces. Following Microchip Technology's 2018 acquisition of Microsemi, these technologies have been integrated into the broader ecosystem, facilitating hybrid designs that combine FPGA programmability with Microchip's peripherals for enhanced embedded solutions in and industrial sectors.

Timing, Voice, and Packet Solutions

Microsemi's timing, voice, and packet solutions encompassed a range of integrated circuits and systems designed for precise in and networking environments. These products included IEEE 1588 (PTP) clocks, Synchronous Ethernet (SyncE) solutions, and T1/E1 framers, which facilitated accurate and phase alignment for voice, video, and data transmission. The IEEE 1588 PTP clocks, such as those in the TimeProvider 4100 series, served as clocks supporting PTP v2, (NTP), and SyncE, enabling sub-microsecond accuracy in distributed networks. SyncE solutions, like the ZL30320 device, combined with IEEE 1588 phase alignment in hybrid modes for telecom equipment. T1/E1 framers, including the PM4351 and MT9072, provided software-selectable framing and line interface for legacy voice and data lines, supporting up to eight independent channels with features like programmable termination for T1 (100Ω), J1 (110Ω), and E1 (120Ω or 75Ω). Key innovations in this portfolio addressed emerging demands in high-speed networks. Atomic clocks, particularly rubidium-based models from Microsemi, delivered frequency stability better than 1.5 × 10^{-11} over two hours for base stations, ensuring holdover performance during GNSS disruptions and supporting enhanced Primary Reference Time Clock (ePRTC) requirements. For hyperscale data centers, packet timing cards like the BC635 PCIe module provided IEEE 1588-compliant synchronization over , distributing precise time and frequency to host systems and peripherals with radial slot compatibility for chassis-wide alignment. These solutions often integrated with FPGAs for custom timing implementations in complex systems. The applications of these technologies spanned sectors. In telecom networks, PTP and SyncE solutions ensured end-to-end for fronthaul and backhaul, minimizing latency in mobile base stations and aggregation sites. For broadcast video, timing systems supported precise in transport streams, enabling seamless multi-camera operations and IP-based video distribution compliant with standards like SMPTE ST 2110. Following the 2018 acquisition by , the timing portfolio saw significant enhancements from 2020 to 2025, including software upgrades to the TimeProvider 4100 series (Release 2.3 and later) for improved security, scalability, and GNSS-independent operation via virtual Primary Reference Time Clocks (vPRTC). The introduction of the TimeProvider 4500 v3 in 2025 added resilient time distribution features, benefiting deployments in . These developments integrated Microchip's wireless connectivity options, extending precise timing to low-power networks.

Power Management, RF, and Storage Products

Microsemi's power management solutions encompassed a range of analog and mixed-signal integrated circuits designed for high-reliability applications, particularly in and environments. These included DC-DC switching converters and controllers capable of handling input voltages from 5.5V to 100V with efficiencies up to 93%, integrating controllers, inductors, and to minimize board space and by 60%. For demanding scenarios such as power systems, Microsemi offered radiation-hardened (rad-hard) isolated DC-DC converters with surface-mount , providing flexibility for customization while ensuring operation in extreme radiation conditions. Additionally, drivers and gate drivers for and IGBTs supported high-reliability power delivery, including protection against events in , as exemplified by devices like the LX7712 rad-hard power control IC. In the RF domain, Microsemi's portfolio featured ()-based amplifiers and transceivers tailored for systems and backhaul infrastructure. -on-silicon carbide () power amplifiers delivered high linearity and output power for continuous-wave and pulsed applications, with discrete transistors supporting frequencies up to 14 GHz. Transceivers and multifunction RF modules extended performance to 110 GHz, enabling low-noise amplification and operation in and high-frequency communication links. These components emphasized efficiency and reliability, with rad-hard variants incorporating low-power designs to withstand environments while maintaining signal integrity for and applications. Microsemi's storage technologies focused on enterprise server connectivity through and interfaces, including controllers and host bus adapters (HBAs). The SmartHBA series provided 12G /SATA connectivity with up to 16 internal ports, supporting high-density in data centers and ensuring reliability via a unified stack deployed in over 30 million servers. SmartROC RAID-on-Chip controllers handled 12 Gbps / protocols with end-to-end error handling, scalability for up to 4K addresses, and low-power operation optimized for systems. These solutions prioritized security, diagnostics, and performance for server-based applications, including tri-mode support for NVMe// in PCIe Gen 4 environments. Following Microchip Technology's acquisition of Microsemi on May 29, 2018, these product lines were integrated into Microchip's broader portfolio, merging Microsemi's rad-hard with Microchip's ICs (PMICs) to expand applications in , automotive, and sectors. This synergy enhanced overall efficiency, such as combining DC-DC converters with advanced for wider use, while RF and offerings benefited from Microchip's ecosystem for improved interconnectivity and power optimization. The integrated lineup includes 24G controllers (announced in 2018) that saturate PCIe Gen 4 bandwidth for high-performance .

Security and Connectivity Solutions

Microsemi's security and connectivity solutions encompass a range of integrated circuits and systems designed to enable secure data transmission and power delivery in networked environments. Key offerings include (PoE) controllers, USB bridge controllers, and cryptographic accelerators, which facilitate reliable connectivity while embedding security at the hardware level. These products, now integrated into Microchip Technology's portfolio following the 2018 acquisition, support standards such as for PoE and USB 2.0/3.0 protocols, ensuring in diverse applications. PoE controllers from Microsemi, such as the PD69208M and PD69210, provide power sourcing equipment (PSE) functionality for delivering up to 90W over Ethernet cables, integrating power management, analog circuitry, and logic in compact packages compliant with IEEE 802.3af, 802.3at, and 802.3bt standards. USB bridge controllers, including those supporting Flash media, UART/SPI interfaces, and Ethernet bridging, offer ultra-fast data transfer rates and configurable features like GPIO pins and EEPROM for custom identification, with models like the USB-to-Ethernet bridges enabling 10/100/1000BASE-T connectivity. Cryptographic accelerators, embedded in security ICs and FPGA systems, incorporate hardware engines for algorithms such as AES, SHA-256, and elliptic curve cryptography (ECC), optimizing performance for encryption tasks with low power consumption. Security features in these solutions emphasize hardware-based protections, including root-of-trust mechanisms in FPGAs via Physically Unclonable Functions (PUF) for secure key generation and storage, alongside side-channel-resistant crypto accelerators like the F5200B coprocessor. Many products achieve compliance with through validated cryptographic modules, such as those in the CryptoAuthentication family and PolarFire FPGAs, ensuring adherence to federal standards for secure data handling and tamper resistance. Building on FPGA-based security extensions, these features provide dedicated hardware for secure boot, firmware updates, and anti-tamper detection. These solutions find applications in (IoT) for secure sensor networks, data centers for protected server interconnects, and for low-latency, resilient processing in remote deployments. For instance, PoE controllers power secure IP surveillance and systems, while crypto accelerators safeguard communications in and environments. USB bridges support authenticated interfaces in point-of-sale and automotive systems, enhancing overall integrity. Under Microchip, recent developments from 2023 to 2025 have focused on enhancing cybersecurity integrations for networks, including PoE support for and secure elements in PolarFire SoC FPGAs to address vulnerabilities in high-speed , aligning with EU RED cybersecurity requirements for devices.

Acquisitions

1980s acquisitions

During the 1980s, Microsemi pursued a series of small-scale acquisitions to expand its presence in (RF) and markets, acquiring three to four firms at a total cost under $50 million. These deals, primarily executed under the leadership of Philip Frey Jr., marked the company's initial foray into strategic consolidation within the sector. A pivotal early acquisition occurred in the second half of 1982, when Microsemi purchased the Components Group based in , which specialized in RF and provided access to European technology expertise. This move enabled Microsemi to bolster its RF portfolio and integrate advanced manufacturing capabilities, contributing to entry into high-reliability RF applications. Subsequent acquisitions in 1986 further strengthened power-related offerings: Bikor Electronics was acquired for less than $1 million in and , expanding Microsemi's base in power components and adding proprietary technological knowledge. Later that year, RPM Enterprises, a Santa Ana-based firm, was bought for approximately $1 million in and notes, enhancing production of discrete . In November 1986, Microsemi completed the $1.5 million purchase of Co.'s Power Transistor Components unit, which directly boosted its analog and power lines for and uses. These acquisitions had a notable strategic impact, introducing European-sourced innovations and diversifying Microsemi's product mix toward RF and solutions amid the broader under Frey. By fiscal 1988, the company's had grown to $83.7 million, roughly doubling from $38.7 million in fiscal 1986, partly driven by synergies from these integrations despite initial profitability challenges in some units. Overall, the deals positioned Microsemi for sustained growth in analog semiconductors, with sales from acquired entities like the former operation increasing by 50% post-acquisition.

1990s acquisitions

During the , Microsemi Corporation executed a series of strategic acquisitions to bolster its expertise in high-reliability semiconductors, particularly for , , and mixed-signal applications, expanding beyond its core analog and power components. These moves enhanced product diversification and in demanding sectors like electronics. In 1992, Microsemi acquired Unitrode Corporation's semiconductor products division, based in , including its manufacturing facility in , ; this added advanced power management and mixed-signal technologies tailored for rugged environments. The deal, for an undisclosed amount, integrated Unitrode's and portfolios, strengthening Microsemi's position in -grade power solutions. Building on this foundation, Microsemi targeted power and discrete component specialists in the mid-1990s. In September 1997, it acquired PPC Products, Inc., a provider of power transistors, linear regulators, rectifiers, and MOSFETs used in industrial and systems. This acquisition, terms undisclosed, expanded Microsemi's discrete power offerings and supported integration with existing analog lines. In May , Microsemi purchased BKC Semiconductors, Inc., for approximately $11.9 million (at $9.17 per share for 1.3 million shares), gaining expertise in high-reliability discrete diodes for and space applications. BKC's closure in late 1999 allowed Microsemi to consolidate these defense-focused assets, enhancing its mixed-signal and protection capabilities. The decade closed with two key deals that further diversified revenue. In April 1999, Microsemi acquired Linfinity Microelectronics, Inc., a Symmetricom subsidiary, for $24.125 million in cash, marking its entry into advanced mixed-signal integrated circuits for power management in telecommunications and computing. This bolstered design capabilities for low-voltage applications. In June 1999, it bought Narda Microwave Semiconductor operations from Communications & Power Industries for undisclosed terms, adding gallium arsenide-based RF and microwave components critical for radar and satellite systems. Over the , these five acquisitions—collectively involving tens of millions in disclosed transaction values—diversified Microsemi's , reduced reliance on discrete components, and reinforced its competitive edge in and mixed-signal markets, setting the stage for accelerated in the following decade.

2000s acquisitions

During the , under the leadership of CEO James J. Peterson, who assumed the role in , Microsemi pursued a of through targeted acquisitions to expand its in high-reliability semiconductors, RF/microwave components, and solutions, particularly for , , and communications applications. This approach complemented organic innovation and capitalized on the fragmented analog and mixed-signal semiconductor market, enabling the company to integrate complementary technologies and customer bases. By the end of the decade, these efforts contributed to revenue growth from approximately $239 million in fiscal to $453 million in fiscal , with acquisitions adding over $150 million in annual recurring revenue through enhanced product offerings in niche, high-margin sectors. Early in the decade, Microsemi focused on bolstering its RF and /aerospace capabilities. In February 2000, it acquired the HBT Business Products Group from Infinesse Corporation for $6 million, gaining (GaAs) and indium gallium phosphide (InGaP) (HBT) amplifier technology to support next-generation and optoelectronic products. This move expanded Microsemi's internal fabrication capacity for high-frequency components. In August 2001, the company acquired New England Semiconductor Corp. and Compensated Devices Inc. in separate transactions totaling about $11.5 million, adding specialized and manufacturing for high-reliability and applications, thereby strengthening its position in radiation-hardened semiconductors. Mid-decade acquisitions emphasized and technologies. In April 2006, Microsemi acquired Advanced Power Technology Inc. (APT) in a $108 million deal (including cash and stock), incorporating () and lateral diffusion technologies to enhance its high-voltage power solutions for RF and industrial uses. This integration added significant scale, with APT contributing around $70 million in annual revenue. In 2007, Microsemi purchased PowerDsine Ltd., a leader in (PoE) solutions, further diversifying into networking infrastructure components. The latter half of the saw a surge in deals targeting and RF enhancements, culminating in eight to ten acquisitions overall. In 2008, Microsemi completed three key purchases: TSI Microelectronics for $2 million in January, adding custom for ; Semicoa in July for $25 million, bolstering high-reliability transistors and MMICs for and systems (though later subject to antitrust scrutiny requiring asset divestitures); and Babcock Inc. in October for $20 million, incorporating mission-critical power supplies for platforms. These moves collectively added over $100 million in annual revenue and fortified Microsemi's presence in secure, high-barrier markets. In 2009, the acquisition of Nexsem Inc.'s assets for an undisclosed amount further expanded RF integrated solutions, rounding out the decade's consolidation efforts.

2010s acquisitions

In the , Microsemi pursued an aggressive acquisition strategy to expand its portfolio in programmable logic, , timing, and networking technologies, completing over ten deals that collectively exceeded $3 billion in value. This period marked a shift toward large-scale consolidations, building on earlier voice and mixed-signal foundations to position the company as a diversified provider. Key transactions enhanced Microsemi's capabilities in , data centers, and communications infrastructure. A pivotal early acquisition was Corporation in October 2010 for approximately $430 million, which strengthened Microsemi's (FPGA) offerings with Actel's expertise in nonvolatile, low-power, and mixed-signal FPGAs tailored for , , and applications. This deal integrated Actel's and ProASIC families, enabling Microsemi to compete more effectively in radiation-hardened and security-focused programmable logic markets. The acquisition was accretive, contributing to improved margins and product diversification within the first full year. In March 2015, Microsemi acquired Vitesse Semiconductor Corporation for $389 million, enhancing its Ethernet and carrier networking portfolio with Vitesse's high-speed PHYs, switches, and timing ICs for telecom and applications. Valued at $5.28 per share—a 32% premium—the deal added multi-gigabit Ethernet solutions, supporting Microsemi's expansion into and enterprise . Vitesse's integration accelerated revenue from connectivity products and solidified Microsemi's position in packet processing. Microsemi's largest deal came in November 2015 with the $2.2 billion acquisition of , completed in January 2016, which bolstered its , timing, and solutions for centers and cloud infrastructure. brought advanced , host-bus adapters, and / controllers, expanding Microsemi's reach into enterprise and optical networking. The transaction, structured as $9.22 in cash and 0.0771 shares of Microsemi stock per PMC share, represented a 77% premium and integrated complementary technologies to drive growth in high-speed connectivity. In October 2013, Microsemi acquired Symmetricom, Inc. for approximately $230 million (net of cash), adding comprehensive timing, synchronization, and frequency solutions including atomic clocks and network time servers, which strengthened its position in , data centers, and applications. These major acquisitions transformed Microsemi into a full-spectrum provider across semiconductors, with annual surging to $1.8 billion by , driven by synergies in FPGA, storage, and networking segments. The investments not only diversified streams—reducing reliance on markets—but also enhanced technological maturity ahead of broader . Smaller deals, such as VT Silicon in 2010 for and White Electronic Designs in 2010 for memory modules (later divested), further supported portfolio breadth without dominating the decade's scale.

Leadership and Governance

Key Executives and CEOs

Philip Frey Jr. served as president and CEO of Microsemi Corporation from 1971 to 2000, during which time he guided the company through significant expansion in the sector. Recruited from Teledyne Inc.'s division, Frey led the 1971 of the operations and focused on growth in and applications. Under his , the company, originally known as Microsemiconductor, was renamed Microsemi in February 1983 to better reflect its broadening portfolio in microelectronic components. Frey oversaw early diversification efforts, including multiple acquisitions that expanded product lines into and RF technologies, helping to stabilize and grow the firm amid market fluctuations. James J. Peterson succeeded Frey as president and CEO in November 2000, holding the position until Microsemi's acquisition by in 2018. Prior to his promotion, Peterson had joined Microsemi through the acquisition of Microelectronics, where he served as president. During his tenure, Peterson spearheaded an aggressive acquisition strategy, completing over 30 deals that integrated complementary technologies in FPGAs, timing solutions, and security products, transforming Microsemi from a $247 million revenue company into one with $1.8 billion in annual revenue by 2018. This growth culminated in Microchip's $10.15 billion acquisition of Microsemi, announced in March 2018 and completed in May 2018. Peterson's compensation packages typically ranged from $5 million to $28 million annually, comprising base salary, stock awards, and performance incentives, reflecting his role in driving . Other key executives included technical leaders who supported innovation in the and beyond, such as CTO roles focused on advancing mixed-signal and FPGA technologies. Following the 2018 acquisition, Microsemi's leadership transitioned under Microchip, with the original executive team, including Peterson, departing as Microchip's CEO integrated operations and appointed internal executives to oversee the combined entity's divisions.

Board Composition and Changes

Microsemi Corporation was founded in 1959 by Arthur Feldon and Steve Manning, who served on the company's early board of directors prior to its initial public offering on April 3, 1981. Following the IPO, the board composition evolved to include a mix of executives and independent directors, with significant additions in the post-2000 period to enhance oversight and expertise in semiconductors and technology governance. James J. Peterson joined the board in 2000 and later assumed the role of Chairman and CEO. By 2017, the board consisted of 9 members, 8 of whom were independent non-employee directors, including Dennis R. Leibel as Lead Independent Director (since 2002), Thomas R. Anderson (since 2002), William E. Bendush (since 2003), William L. Healey (since 2003), Paul F. Folino (since 2004), Matthew E. Massengill (since 2006), and more recent additions like Kimberly E. Alexy (since 2016) and Richard M. Beyer (since 2017). Diversity on the board increased modestly in the , with women comprising approximately 11% of members by , exemplified by the appointment of Kimberly E. Alexy to the Compensation Committee. Key changes occurred in amid the acquisition by , where the entire Microsemi board resigned upon completion of the merger on May 29, , as Microsemi became a wholly owned and its governance integrated into Microchip's structure. Post-acquisition, Microchip's board oversaw the combined operations, maintaining a focus on independent directors; by fiscal 2020, it comprised 5 members, including as Executive Chair. As of November 2025, Microchip's board consists of 6 members: (Chair, CEO, and President since 1990), Matthew W. Chapman (Lead since 1997), Ellen L. Barker (since 2024), (since 2025), (since 2025), and Karen M. Rapp (since 2021), with women representing about 33% of the composition.

Awards and Recognition

Product Innovation Awards

Microsemi's PolarFire FPGA family received the 2017 Product of the Year award from Electronic Products Magazine, recognizing its breakthrough in low-power mid-range FPGA design. The device offers up to 50% lower power consumption compared to traditional SRAM-based FPGAs while delivering 500,000 logic elements, 12.7 Gbps transceivers, and advanced features like DPA-resistant , making it ideal for applications in communications, industrial , and . The same PolarFire family also earned the 2017 Product of the Year designation from Electronic Products and 21ic.com, highlighting its cost-optimized performance and for global markets. This dual recognition underscored the FPGA's innovation in non-volatile technology, which eliminates the need for external and reduces by avoiding battery-backed . In the realm of secure SoC integration, Microsemi's SmartFusion2 SoC FPGA won the 2013 DesignVision Award at Embedded World in the Semiconductor Components and ICs category, praised for its embedded ARM Cortex-M3 processor and comprehensive security features including cryptographic engines and secure boot capabilities. These elements enable robust protection against side-channel attacks and unauthorized access, setting a standard for embedded systems in industrial and sectors. Microsemi's radiation-hardened (rad-hard) FPGAs, such as the RTAX-S/SL series, were recognized for their reliability in extreme space environments. By , the company had shipped over 10,000 units for and deep-space missions. These devices offer immunity to total ionizing dose up to 1 Mrad and single-event upsets, supporting high-reliability without reconfiguration risks. Microchip's PolarFire SoC FPGA, originally developed by Microsemi, received an Honorable Mention in the 2023 LEAP Awards by WTWH in the Embedded Computing category, recognizing its innovation in low-power, secure processing solutions.

Corporate and Industry Honors

Microsemi Corporation received the Analyst Favorite Semiconductor Award in 2016 from the Global Semiconductor Alliance (GSA), an accolade presented by Needham & analysts to recognize the company's strong performance, innovation, and market leadership in the semiconductor sector. This honor highlighted Microsemi's revenue growth and strategic positioning ahead of its major acquisitions and eventual integration into . In 2017, Microsemi was honored as the M2M Network Equipment Technology Company of the Year by the IoT Breakthrough Awards, acknowledging its overall contributions to machine-to-machine connectivity solutions and industry-wide advancements in infrastructure. The award underscored the company's enterprise-level excellence in enabling reliable, secure networking for emerging technologies. Microsemi also earned recognition for its efforts, winning the ITsAP Corporate Social Responsibility Award in 2013 in the Creation of Educational Infrastructure category for initiatives supporting the Oral School for the Deaf in , , demonstrating commitment to and . This accolade reflected the company's broader societal impact beyond technical achievements. Prior to its 2018 acquisition by , Microsemi was awarded the Outstanding Components Vendor honor by Light Reading in 2018, praised for its innovation, product portfolio, and role in advancing trends within the communications industry. Following the acquisition, Microchip was included in Newsweek's America's Most Responsible Companies list in 2024, recognizing its corporate responsibility and practices across its global footprint. Additionally, Microchip received the Outstanding Community Projects Award in 2022 from the Republic of the , recognizing its impactful social initiatives.

Controversies

James Peterson Education Claims (2009)

In late 2008, allegations emerged that James J. Peterson, then CEO of Microsemi Corporation, had misrepresented his educational qualifications in multiple filings dating from 2000 to 2008. Peterson had listed a in and a from (BYU), but investigations revealed he had only earned an associate's degree from Ricks College in 1978 and accumulated credits toward a bachelor's degree at BYU between 1979 and 1980 without completing it. Peterson initially denied the claims in a , 2008, company statement, asserting he had "categorically" not misrepresented his credentials and expecting BYU to confirm his degrees. Microsemi's launched an independent investigation led by the law firm LLP, which confirmed the misrepresentations but found no evidence of broader issues affecting Peterson's performance or company operations. The board opted to retain Peterson as CEO, citing his strong , while imposing financial penalties including an immediate $100,000 payment to the company, forfeiture of his fiscal 2009 bonus (valued at an average of $680,000 over the prior three years), and a one-year delay in vesting for 323,000 units. The U.S. initiated an inquiry in early 2009 to determine whether Peterson's denial in the company statement had misled investors, focusing on potential violations of securities laws related to the of executive qualifications. No formal charges were publicly filed against Peterson or Microsemi, and he did not admit to any wrongdoing as part of the board's resolution. The board's review cleared Peterson of any impact on his prior compensation or decision-making authority, emphasizing that the misrepresentations did not influence his leadership effectiveness. The controversy led to a temporary decline in Microsemi's stock price, with shares dropping approximately 5% on , 2008, following initial reports. In response, the company implemented enhanced internal controls, including mandatory background checks and credential verifications for Section 16 officers and directors, amendments to its Code of Ethics and Business Conduct to address disclosure accuracy, and a new review process for executive press statements. These measures aimed to prevent similar issues and restore investor confidence without broader governance overhauls.

ProASIC3 Backdoor Allegations (2012)

In 2012, researchers Sergei Skorobogatov and Christopher Woods from the published findings alleging the presence of a in Microsemi's ProASIC3 family of field-programmable gate arrays (FPGAs), specifically the A3P250 model. The discovery was made using a novel Pipeline Analysis (PEA) technique, which analyzed optical emissions from the chip's to identify undocumented functionality in the interface. They claimed this backdoor, activated by a hidden 128-bit key, allowed unauthorized extraction of the device's configuration bitstream (comprising 1,913,600 bits), reprogramming of cryptographic keys, and modification of low-level features, potentially enabling theft, , or device sabotage. The researchers emphasized that the backdoor was embedded in the itself, not in , making it unpatchable without physical replacement, and highlighted risks for and high-security applications where ProASIC3 chips were widely deployed due to their marketed superior security features. The allegations were detailed in a paper presented at the Cryptographic Hardware and Embedded Systems (CHES) conference in September 2012, where the researchers described how the backdoor bypassed official mechanisms like and FlashLock passcodes, allowing access to unencrypted data or permanent device damage. Skorobogatov and argued that the feature contradicted Microsemi's (formerly ) claims of providing "one of the highest levels of design in the ," as it could facilitate remote attacks on networked systems or during . They had previously contacted in 2002 and subsequent years about related vulnerabilities, such as glitching attacks and , but received no substantive response until the 2012 disclosure. Microsemi promptly denied that the identified feature constituted an intentional backdoor designed to undermine user , issuing a public statement on May 31, 2012. The company described it as a standard internal test facility for factory debugging, which is disabled in all customer-shipped devices and only accessible via a customer-supplied passcode in programmed units. Microsemi asserted that users could fully disable the facility by configuring the FPGA to its highest setting (Permanent Lock), preventing any passcode-based access, and noted that the researchers had not shared technical details or equipment for independent verification. In response to the claims, Microsemi advised customers to implement Permanent Lock for optimal protection and reiterated the robustness of ProASIC3's architecture against known attacks. The researchers rebutted Microsemi's position, pointing to evidence in Actel's own Libero software files (e.g., STAPL scripts containing references like "ULUWE") that suggested the feature's undocumented nature and potential for exploitation via fault attacks even under Permanent Lock. They maintained that extracting the backdoor key took approximately one day using , while AES keys could be obtained in minutes and passcodes in hours, underscoring exploitable weaknesses. The controversy resulted in limited immediate fallout for Microsemi, with reports indicating only minor customer inquiries rather than widespread defections or regulatory scrutiny. It prompted the company to reinforce documentation on FPGA best practices, emphasizing options to mitigate risks in sensitive deployments. The incident heightened industry awareness of hardware-level vulnerabilities in secure chips, influencing subsequent discussions on integrity for military-grade components, though no evidence emerged of actual exploitation or involvement by foreign entities like .

Pre-Acquisition Discounting Practices (2018)

In the first quarter of 2018, Microsemi Corporation implemented aggressive discounting strategies, offering up to 50% discounts on field-programmable gate arrays (FPGAs) and other products to distributors and direct customers, primarily to accelerate and demonstrate robust growth ahead of its anticipated acquisition by Incorporated. These practices involved shifting direct sales to distribution channels through deep price reductions and interest subsidies on excess inventory purchases, resulting in distributors holding approximately four months' worth of stock—nearly double Microchip's typical target of 2.5 months. The strategy inflated Microsemi's revenue by an estimated $200 million in the preceding year, masking underlying end-user demand and creating a temporary boost to financial performance during the merger negotiations. During Microchip's due diligence process, which spanned from December 2017 to March 2018 and involved access to over 15 gigabytes of Microsemi's data including sales and inventory records, these discounting tactics were identified as contributing to elevated channel inventory levels, though the full extent of their on post-acquisition financials was not fully anticipated at the time. The acquisition closed on May 29, 2018, for approximately $10.15 billion. In the subsequent June 2018 quarter (Microchip's fiscal Q1 2019), Microchip shipped roughly $100 million less inventory than Microsemi's prior management had planned, leading to a shortfall relative to expectations and highlighting the overhang from pre-acquisition practices. Following the merger, Microchip discontinued Microsemi's quarter-end discount incentives and commission-based sales structures, transitioning to a unified model that emphasized sustainable over short-term acceleration. No formal regulatory charges were brought against Microsemi or its executives regarding these practices, though they contributed to litigation against Microchip for alleged inadequate pre-merger disclosures. In October 2018, four former Microsemi senior executives, including CEO James Peterson, filed a lawsuit against Microchip CEO and other senior management, alleging false and defamatory statements about their business practices post-acquisition. The suit was settled in March 2020 on confidential terms, with no admission of wrongdoing by either party, stemming from differing business philosophies. Minor adjustments to 2019 arose from purchase for the acquisition, including step-up and costs, but these did not materially alter overall reported results.

Global Presence

Headquarters and U.S. Facilities

Microsemi was founded in 1959 in , as Microsemiconductor, where it initially operated its headquarters. In 1972, the company relocated its headquarters to , to support expanding operations in semiconductor manufacturing. This move aligned with growth in high-reliability components for and applications. By 2001, Microsemi shifted its headquarters to , consolidating administrative and engineering functions in a facility near . In 2011, it further relocated to , establishing a major R&D campus at One Enterprise Drive that housed between 501 and 1,000 employees focused on innovation in mixed-signal and RF solutions. Key U.S. facilities included the owned production and engineering site in , which specialized in radiation-hardened components for space and , including diodes, transistors, and power management devices certified to MIL-PRF-38535 standards. Following Microchip Technology's acquisition of Microsemi in May 2018, corporate headquarters functions integrated into Microchip's base in . Legacy facilities, including the Aliso Viejo R&D campus and Garden Grove fabrication site, were retained to sustain specialized and production.

International Offices and Operations

Microsemi established a network of international offices and operations to support its semiconductor design, manufacturing, and customer service needs across key regions. In , the company's primary hub was in , , , designated as its European headquarters in 2012 following two decades of operations there. This 62,500-square-foot facility (as of 2005) housed manufacturing, (R&D), and administrative functions, with a focus on analog mixed-signal and timing products; by 2008, it employed approximately 315 staff, a number that grew with subsequent expansions including systems integration teams. Microsemi also maintained a and office in , , to facilitate regional distribution and customer engagement. In the , an administrative in supported European operations, stemming from earlier acquisitions like Zarlink Semiconductor. In Asia, Microsemi's presence emphasized and sales to tap into regional talent and markets. The company operated a and support center in , , established in September 2009 and expanded in 2013 to include dedicated engineering, marketing, and sales teams focused on communications and solutions. A sales office in complemented these efforts, aiding customer outreach in the region. In , Microsemi ran a manufacturing facility in until its closure in late ; this site produced lower-value solutions but was shuttered as it did not align with the company's strategic shift toward higher-end products, with no material financial impact anticipated. In , operations were centered in following the 2007 acquisition of PowerDsine Ltd., which bolstered Microsemi's and FPGA-related security capabilities in the . Beyond these regions, Microsemi had a facility in , , supporting communications and packet processing solutions, particularly after the 2015 acquisition of Vitesse Semiconductor Corporation, which enhanced its Ethernet and high-speed connectivity portfolio. Prior to its 2018 acquisition by Incorporated, Microsemi operated more than 20 global sites, spanning R&D, manufacturing, and sales across , , , the , and to serve diverse markets like , , and data centers. Following the completion of Microchip's $10.15 billion acquisition of Microsemi in May 2018, international operations were integrated into Microchip's broader global footprint, emphasizing efficiency and with a strengthened focus on facilities for manufacturing and design. By 2025, this streamlining supported ongoing R&D in locations like , , and , , while maintaining 24 facilities worldwide (as of March 2025) to align with post-merger synergies estimated at $300 million annually.

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