Teridian Semiconductor
Teridian Semiconductor is a mixed-signal integrated-circuit brand focused primarily on energy metering and Smart Grid applications.
Last updated August 26, 2026
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Overview
Teridian Semiconductor Corporation, commonly known as Teridian or TSC, is a semiconductor brand associated primarily with mixed-signal integrated circuits for energy measurement, management, and Smart Grid equipment. Its best-known products are metrology system-on-chip solutions that combine analog measurement functions, digital processing, and supporting control capabilities for electricity meters and related infrastructure. The brand's products are intended to help equipment manufacturers measure electrical consumption and manage the interface between utility networks, meters, and connected energy systems. The business traces its roots to Silicon Systems, an electronics operation established in Tustin, California. Its early business model emphasized complete system solutions rather than isolated semiconductor components. Such solutions brought together analog and digital circuitry with firmware and, where appropriate, larger system software and device drivers. Over time, the operation passed through several corporate reorganizations and ownership changes. It was sold to Texas Instruments and later reorganized again, while portions of the business were subsequently sold to TDK Corporation. TDK moved the operation to nearby Irvine, California, which became associated with the later Teridian organization. Teridian Semiconductor was formed on April 8, 2005, through a leveraged buyout arranged by Golden Gate Capital. As an independent company, it developed and marketed mixed-signal technologies for energy measurement and communications-related applications. Its portfolio at different points extended beyond energy metering to include power-line communications, 10/100 Ethernet physical-layer devices, combined Ethernet MAC-and-PHY products, small-form-factor pluggable modules, voice-over-IP FXO products, PSTN soft modems using silicon data-access arrangements, smart-card interfaces, and secure-access controllers. Maxim Integrated Products acquired Teridian in April 2010 for $315 million in cash. The transaction brought Teridian's technologies into Maxim's broader analog and mixed-signal semiconductor portfolio. Under Maxim, the energy-measurement business remained the principal basis for the Teridian identity, while some other former Teridian product families continued within Maxim rather than being retained as a single unified Teridian-branded portfolio. The energy-measurement products group was subsequently transferred to Silergy. Reference material describes the transaction as having an approximately $110 million value, with completion associated with December 31, 2015, regulatory early termination reported on February 25, 2016, and the sale publicly identified on March 18, 2016. After the transfer, some personnel remained with Maxim to support product lines that did not move with the energy-measurement business. Teridian is therefore best understood as a specialist semiconductor brand operating within Silergy's portfolio, rather than as an independently listed semiconductor company. Publicly available reference material does not identify a separate current website, stock ticker, or independently reported financial statements for the brand.
History
Teridian Semiconductor's history extends back more than three decades before the company adopted the Teridian name. The underlying operation began as Silicon Systems in Tustin, California. Its original concept was comparatively broad for a semiconductor business: instead of supplying only individual chips, it sought to deliver complete solutions combining analog circuitry, digital logic, firmware, and larger software or driver components where required. This orientation helped establish a foundation for later mixed-signal and system-on-chip work. The business underwent several reorganizations and ownership changes. It was sold to Texas Instruments and later reorganized, after which portions of the operation were sold to TDK Corporation. TDK moved the business to Irvine, California. The Irvine location became associated with the subsequent Teridian organization and remains the headquarters location identified in reference material. Teridian Semiconductor was created on April 8, 2005, through a leveraged buyout arranged by Golden Gate Capital. As an independent company, it developed mixed-signal integrated circuits serving energy measurement and communications markets. Energy metering became the central area of identity, with metrology system-on-chip products designed for electricity measurement, management, and control in Smart Grid environments. The company also had a wider historical portfolio, including power-line communications, Ethernet physical-layer and combined MAC-and-PHY products, SFP modules, VoIP FXO devices, PSTN soft modems using silicon DAA technology, smart-card interfaces, and secure-access controllers. In April 2010, Maxim Integrated Products acquired Teridian for $315 million in cash. The acquisition integrated Teridian into Maxim's analog and mixed-signal semiconductor operations. Although Teridian's energy-measurement products remained associated with the brand, other product families subsequently remained with Maxim Integrated rather than moving together as one continuing product organization. The energy-measurement products group was later sold to Silergy. Available reference material describes the transaction as approximately $110 million and gives several related dates: completion associated with December 31, 2015; Federal Trade Commission early termination on February 25, 2016; and public identification of the sale on March 18, 2016. Because the supplied references present these dates in different parts of the transaction chronology, the exact announcement and closing sequence should be checked against primary transaction records. Some employees remained with Maxim to support product lines that were not part of the transferred energy-measurement group. Following the transaction, Teridian is best characterized as a Silergy-associated semiconductor brand focused on energy metrology and Smart Grid integrated circuits. It is not documented as an independently listed company, and no separate current corporate website or public ticker is identified in the supplied material.
- 2016
Energy-measurement group moves to Silergy
[1]The Teridian energy-measurement products group was sold to Silergy in a transaction described as approximately $110 million; the sale was identified publicly on March 18, 2016.
- 2015
Reported completion of Silergy transaction
[1]Reference material associates completion of Silergy's acquisition of the Teridian energy-measurement group with December 31, 2015.
- 2010
Acquisition by Maxim Integrated
[1]Maxim Integrated Products acquired Teridian in April 2010 for $315 million in cash.
- 2005
Teridian Semiconductor is formed
[1]Teridian Semiconductor was established on April 8, 2005, through a leveraged buyout arranged by Golden Gate Capital.
Silicon Systems origins
[1]The predecessor operation began as Silicon Systems in Tustin, California, with a strategy built around integrated analog, digital, firmware, and software solutions.
Products and positioning
A specialist mixed-signal semiconductor brand centered on integrated energy-metering and Smart Grid measurement solutions, with a historical portfolio spanning communications interfaces and secure-access technologies.
Energy metering and Smart Grid integrated circuits
Teridian metrology system-on-chip solutions
Teridian's principal product family consists of mixed-signal metrology system-on-chip solutions for electricity meters and Smart Grid equipment. These devices support energy measurement, management, and control by combining measurement-oriented analog functions with digital processing and system integration. Their purpose is to help meter manufacturers build compact equipment capable of monitoring electrical consumption and participating in broader utility-management infrastructures.
Power-line communications
Power-line communication products
Power-line communication products were part of Teridian's historical portfolio. They enabled communications over electrical wiring, supporting connected-meter and other networking applications. The supplied reference identifies this product area as a former Teridian offering but does not establish that the complete line remains under the current Teridian brand.
Networking semiconductors
Ethernet PHY and MAC-and-PHY products
Teridian's former communications portfolio included 10/100 Ethernet physical-layer devices and products integrating Ethernet MAC and PHY functions. These components addressed wired networking interfaces in embedded and communications equipment. Reference material states that other former Teridian products remained with Maxim Integrated after the energy-measurement business was transferred, so their current branding and ownership should not be assumed to be Teridian.
Optical and network interface modules
SFP modules
Small-form-factor pluggable modules were among the communications products historically associated with Teridian. They served modular network-interface applications, allowing equipment designs to accommodate different physical or optical connectivity options. The supplied sources do not provide a current catalog or confirm continued availability under the Teridian name.
Telephony and modem semiconductors
VoIP FXO and PSTN modem products
The former Teridian portfolio included voice-over-IP foreign-exchange-office products and PSTN soft modems using silicon data-access arrangement technology. These products supported telephony interfaces and modem connectivity by integrating functions traditionally implemented with multiple communications components. The reference material treats these offerings as former products that remained with Maxim or otherwise fell outside the transferred energy-measurement group.
Security and access-control semiconductors
Smart-card interfaces and secure-access controllers
Teridian also historically supplied smart-card interface devices and secure-access controllers. These components addressed communication with secure cards and control of access-related functions in embedded systems. They demonstrate the breadth of the earlier business, although the available material does not identify current products, model numbers, or continuing ownership under the Teridian brand.
Brand decisions
2016
Transfer of the energy-measurement group to SilergyM&ABackground
The Teridian energy-measurement business formed the core of the brand's continuing market identity, while other former Teridian products remained with Maxim Integrated.
Action taken
Silergy acquired the Teridian energy-measurement products group from Maxim. Reference material describes the transaction as approximately $110 million and associates its completion with December 31, 2015, while identifying the sale publicly on March 18, 2016.
Aftermath
Teridian's energy-metering and Smart Grid activities became associated with Silergy. Some personnel stayed with Maxim to support products outside the transferred group. The transaction chronology requires verification against primary filings because the supplied dates describe different stages.
Reported transaction value. Approximately $110 million (2015–2016 transaction chronology)
2010
Maxim Integrated's acquisition of TeridianM&ABackground
Teridian was an independent mixed-signal semiconductor company with energy-measurement and communications products. Maxim Integrated sought to add its technologies and product expertise to its analog and mixed-signal portfolio.
Action taken
Maxim Integrated acquired Teridian in April 2010 for $315 million in cash.
Aftermath
Teridian's operations and technologies became part of Maxim Integrated. The energy-measurement identity continued, while several other former Teridian product lines remained with Maxim.
Acquisition price. $315 million (April 2010 transaction)
Sources1 sources
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