SiTime
A fabless semiconductor company developing silicon MEMS timing devices and precision clock solutions for electronics and infrastructure.
Last updated October 16, 2026
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Overview
SiTime Corporation is a United States-based fabless semiconductor company specializing in micro-electromechanical systems (MEMS) timing products. The company develops silicon-based resonators, oscillators, clock integrated circuits and related precision-timing devices intended to serve as alternatives to, or improvements over, conventional quartz timing components. Its products are used to generate, maintain and distribute accurate timing in electronic systems, including communications equipment, data-center infrastructure, consumer devices, automotive electronics, industrial systems, aerospace platforms and defense equipment. The company was established in Santa Clara, California, in 2005 by researchers Marcus Lutz and Aaron Partridge. Its business model is fabless: SiTime designs its products while relying on semiconductor foundry partners for manufacturing. This approach has allowed the company to concentrate on MEMS design, timing architectures, packaging and application-specific performance rather than operating its own large-scale fabrication facilities. Robert Bosch and Taiwan Semiconductor Manufacturing Company are identified as foundry partners in the company's reference material. A significant ownership and corporate-development milestone came in 2014, when Japanese fabless semiconductor company MegaChips acquired SiTime for $200 million. SiTime subsequently developed a broader product portfolio and continued building its position in precision timing. In 2016 it introduced the Elite platform of Super-TCXOs, targeting applications that require stable timing under temperature changes, thermal shock and vibration. The company also expanded its presence in automotive and emerging communications applications, including the opening of a research center in Dexter, Michigan, announced in 2018 to support the use of MEMS timing products in autonomous vehicles. SiTime's product expansion continued with the Emerald family of MEMS-based timing products for 5G and edge-computing equipment, the Cascade family of clock system-on-chip products, ApexMEMS resonators for space-constrained high-volume designs, and XCalibur active resonators intended to replace quartz resonators. These products reflect the company's effort to move beyond individual timing components toward integrated timing subsystems that combine resonators, oscillator circuitry, clock-generation functions and, in some products, a phase-locked loop. In November 2019, SiTime was spun off from MegaChips and became a publicly traded company. MegaChips remained a significant shareholder, with the reference material identifying an approximately 25 percent holding at that time. As an independent company, SiTime organized its commercial activity around mobile, Internet of Things and consumer products; communications and enterprise infrastructure; and industrial, automotive and aerospace applications. Its cited customers include Apple, Fitbit, Garmin, Samsung, Google, Microsoft, Dell, Hikvision and Huami, although the company serves these markets through component and system-level supply relationships rather than as a consumer-facing brand. SiTime's later portfolio development focused increasingly on demanding timing environments. In 2022 it introduced the XCalibur family of active resonators. In 2023 it released the SiT5543 in the Endura family of ruggedized Super-TCXOs and introduced the Epoch platform of MEMS OCXOs for network and data-center infrastructure. These offerings address equipment exposed to temperature variation, airflow, vibration, shock, electromagnetic interference and other environmental conditions that can degrade timing accuracy. The company operates internationally, with employees and activities reported in the United States, France, Malaysia, the Netherlands, Taiwan, Japan and Ukraine. Its market proposition is based on the potential advantages of MEMS timing over quartz, including small physical size, integration flexibility, resilience in harsh environments and suitability for high-volume semiconductor manufacturing. SiTime's products are therefore positioned primarily as infrastructure and embedded components rather than finished consumer products. The company operates internationally, with employees and activities reported in the United States, France, Malaysia, the Netherlands, Taiwan, Japan and Ukraine. Its market proposition is based on the potential advantages of MEMS timing over quartz, including small size, integration flexibility and resilience in harsh environments.
History
SiTime was founded in Santa Clara, California, in 2005 by researchers Marcus Lutz and Aaron Partridge. From its beginning, the company focused on applying silicon MEMS technology to precision timing. Timing components regulate the operation of electronic systems, establish synchronization for data transfer, control radio-frequency functions and provide stable references for computing, communications and measurement equipment. SiTime's approach was to develop silicon resonators and related oscillator circuits that could provide an alternative to quartz-based timing components. The company operated as a fabless semiconductor designer, developing its architectures and products while using external manufacturing partners. This structure enabled SiTime to pursue semiconductor-style integration and volume manufacturing without owning a dedicated fabrication network. Robert Bosch and TSMC are identified as foundry partners in the reference material. In 2014, MegaChips, a Japanese fabless semiconductor company, acquired SiTime for $200 million. The acquisition provided a corporate and commercial platform for further development of the MEMS timing business. SiTime subsequently expanded its product range beyond basic resonator and oscillator components. In 2016, it launched the Elite platform of Super-TCXOs, designed for applications in which timing stability must be maintained despite temperature changes, thermal shock and vibration. SiTime broadened its application focus in 2018. In May, it announced a research center in Dexter, Michigan, intended to encourage use of its timing products in autonomous vehicles. Later that year, it announced the Emerald line for 5G equipment. Emerald products addressed the need for precise timing in communications and edge-computing infrastructure, where equipment may experience airflow, temperature shifts, vibration, shock and electromagnetic interference. In November 2019, SiTime was spun off from MegaChips and became a publicly traded company. MegaChips continued to hold a substantial interest, reported at approximately 25 percent in the reference material. As an independent public company, SiTime organized its market activity into three broad areas: mobile, IoT and consumer products; communications and enterprise infrastructure; and industrial, automotive and aerospace applications. The company reported customers and end-market relationships involving major technology and electronics companies including Apple, Fitbit, Garmin, Samsung, Google, Microsoft, Dell, Hikvision and Huami. The company continued to expand from discrete timing components toward integrated timing solutions. In August 2020, it announced Cascade, its first clock-chip family, combining a MEMS resonator, oscillator and clock integrated circuit in a system-on-chip format. In October of the same year, it introduced ApexMEMS resonators for high-volume products with tight space constraints. These moves reflected a strategy of increasing integration and addressing system designers seeking smaller, more readily deployable timing components. In 2021, SiTime attracted market attention after Investors Business Daily included it among the 100 best-performing stocks of 2020. During the semiconductor supply disruptions of 2021 and 2022, chief executive Rajesh Vashist said the company's foundry relationships and the small physical size of its devices helped it avoid some supply constraints affecting other chip companies. In February 2022, SiTime launched XCalibur, a family of active resonators intended to replace quartz resonators in suitable designs. The portfolio was extended again in 2023. SiTime released the SiT5543 as part of the Endura family of ruggedized MEMS Super-TCXOs. It also introduced the Epoch platform of MEMS OCXOs, aimed at providing accurate and stable holdover timing for data-center and network infrastructure. These products illustrate the company's continuing emphasis on systems operating under environmental stress and on infrastructure applications where timing failures can affect communications, synchronization and service continuity. SiTime's operations extend across several countries, with employees reported in the United States, France, Malaysia, the Netherlands, Taiwan, Japan and Ukraine. Its products serve three principal commercial domains: high-volume mobile, IoT and consumer electronics; communications, telecom, networking and data-center systems; and industrial, automotive, aerospace and defense equipment. The company's identity remains that of a specialized semiconductor supplier rather than a consumer-facing electronics brand, with its competitive proposition centered on MEMS timing, compact designs, system integration and performance in demanding environments.
- 2023
Endura and Epoch product expansion
[1]SiTime released the Endura SiT5543 and introduced the Epoch MEMS OCXO platform for demanding infrastructure applications.
- 2022
XCalibur active resonators introduced
[1]The XCalibur family was launched as a MEMS-based alternative to quartz resonators.
- 2020
Cascade clock SoC introduced
[1]Cascade became SiTime's first clock-chip product family, integrating MEMS and clock-generation functions.
- 2019
Spin-off and public listing
[1]SiTime was separated from MegaChips and became publicly traded.
- 2018
Dexter research center announced
[1]The company announced a Michigan research center connected with automotive and autonomous-vehicle applications.
- 2018
Emerald platform announced
[1]SiTime announced Emerald timing products for 5G and edge-computing equipment.
- 2016
Elite Super-TCXO platform launches
[1]SiTime introduced the Elite platform for temperature-compensated precision timing in harsh environments.
- 2014
Acquisition by MegaChips
[1]MegaChips acquired SiTime in a transaction reported at $200 million.
- 2005
SiTime is founded
[1]Marcus Lutz and Aaron Partridge founded SiTime in Santa Clara, California, to develop MEMS-based timing technology.
Products and positioning
SiTime positions itself as a silicon MEMS alternative to traditional quartz timing technology, emphasizing miniaturization, integration, precision, resilience and suitability for communications, computing, automotive, industrial, aerospace and defense systems.
Timing components
MEMS resonators
Silicon MEMS resonators provide the frequency reference at the heart of timing systems. SiTime develops resonator products intended to replace conventional quartz components in selected applications, with emphasis on compact packaging, semiconductor manufacturing and integration into oscillator or clock architectures.
Timing components
MEMS oscillators
SiTime's MEMS oscillators combine MEMS resonators with oscillator circuitry and, where appropriate, phase-locked-loop functions. They generate stable clock signals for electronic systems and are designed for applications requiring accurate timing in compact packages or challenging environmental conditions.
Super-TCXOs · 2016
Elite and Elite X
The Elite platform consists of Super-TCXO products designed to maintain precise timing across temperature variation, thermal shock and vibration. The family targets demanding embedded and infrastructure applications where ordinary timing components may lose stability under mechanical or environmental stress.
Precision timing platform · 2018
Emerald
Emerald products are intended for 5G networks and edge-computing equipment. Their design focus is stable timing in systems exposed to airflow, temperature perturbation, vibration, shock and electromagnetic interference, conditions common in distributed communications infrastructure.
Clock system-on-chip · 2020
Cascade
Cascade is SiTime's clock system-on-chip family. It integrates a MEMS resonator, oscillator and clock integrated circuit into a single product architecture, reducing the number of separate timing components that system designers need to deploy.
MEMS resonators · 2020
ApexMEMS
ApexMEMS resonators were developed for high-volume applications in which board area and component dimensions are limited. The product family extends SiTime's effort to replace quartz resonators with small silicon MEMS devices.
Active resonators · 2022
XCalibur
XCalibur is a family of MEMS-based active resonators designed to serve as alternatives to quartz resonators. The products are intended to combine the frequency-reference function with active circuitry in a compact, semiconductor-oriented design.
Ruggedized Super-TCXO · 2023
Endura SiT5543
The SiT5543 is part of SiTime's Endura family of ruggedized MEMS Super-TCXOs. The family is aimed at systems that require reliable timing while operating under temperature changes, vibration, shock or other demanding conditions.
MEMS OCXO platform · 2023
Epoch
Epoch is a MEMS oven-controlled oscillator platform designed to deliver stable holdover timing for data-center, networking and communications infrastructure. It addresses environments where uninterrupted and accurate timing is important even when external timing references are temporarily unavailable.
Brand decisions
2022
Expand the active-resonator portfolioStrategyBackground
Quartz resonators remained a core incumbent technology in electronic timing, creating an opportunity for MEMS-based replacements.
Action taken
SiTime introduced XCalibur active resonators designed to replace quartz resonators in suitable applications.
Aftermath
The launch reinforced SiTime's strategy of offering silicon MEMS alternatives across more parts of the timing component market.
2020
Move into integrated clock chipsProduct launchBackground
SiTime sought to expand beyond discrete resonators and oscillators into more integrated timing solutions.
Action taken
The company launched Cascade, a clock system-on-chip family integrating a MEMS resonator, oscillator and clock IC.
Aftermath
Cascade broadened SiTime's product scope and gave system designers a more integrated clock component.
2019
Spin off SiTime from MegaChipsM&ABackground
After several years under MegaChips ownership, SiTime pursued an independent public-company structure.
Action taken
SiTime was spun off and became publicly traded, while MegaChips retained a significant shareholding.
Aftermath
The transaction established SiTime as an independent public semiconductor company while preserving MegaChips as a major shareholder.
2014
Accept MegaChips acquisitionM&ABackground
SiTime was an independent MEMS timing company seeking broader corporate backing and commercial scale.
Action taken
MegaChips acquired SiTime in a transaction reported at $200 million.
Aftermath
SiTime continued product development within the MegaChips group before later being spun off as a public company.
Acquisition value. $200 million (2014 transaction)
Recent events
Reported
SiTime reports fourth-quarter and fiscal-year 2021 results[2]
SiTime announced financial results for the fourth quarter and fiscal year ended December 31, 2021. The announcement was published on February 2, 2022.
Reported
SiTime completes initial public offering[3]
SiTime announced that it had completed its previously announced IPO of 4,945,000 common shares at $13.00 per share, including the full exercise of the underwriters’ over-allotment option.
Sources3 sources
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