PMC是致力于引领大数据连接、传送和存储的半导体及软件解决方案提供商。 

PMC于1984年成立，并于1991年成为了一家纳斯达克上市公司。现今，PMC全球共有1500人规模，其总部设在硅谷。PMC的产品涉及电信、存储两个领域。在电信领域，其高集成OTN处理器/成帧器等电信解决方案主要用于骨干&城域网络。同时，其无线射频收发方案，可用于目前广泛布建的4G LTE网络。在存储领域， PMC秉持长久以来在高速传输领域的技术优势，研发推出了业界最高性能和最高密度的控制器和扩展器芯片，已被多家存储系统及服务器厂商认可及使用。此外，PMC于2010年通过并购知名厂商Adaptec将业务领域扩展至芯片以外的板卡级解决方案，并将其具有优势的软件堆栈和PMC的高性能芯片结合，推出了一系列针对大型数据中心和标准服务器厂商的RAID阵列卡和HBA产品。2013年，PMC又收购了IDT公司闪存业务部，通过并入业界首款NVMe闪存控制器，完善了存储产品在闪存领域的战略布局。

PMC （纳斯达克代码:PMCS）是半导体及软件解决方案的创新领导者，致力于推动网络升级为连接、传送以及存储大数据的网络。秉持长久以来累积的技术优势，在存储、光网络以及移动网络领域持续创新。PMC高集成度解决方案可提升效能，加速网络升级以实现下一代网络服务。

PMC是一家有着30年历史的公司，其芯片产品覆盖电信网络以及存储设备中，2005年以来，PMC通过并购，开始提供集成芯片、软件以及板卡的高密度系统级产品。多年的设计开发的经验积累、多项专利技术及顶尖开发人员储备使PMC开发的产品在复杂度、集成度等方面均遥遥领先同行。

产品与服务

存储
业界领先的存储解决方案，可实现下一代企业存储、数据中心和云服务。
PMC 高集成度的系统级芯片以及固件解决方案，能够助力存储设备以最低功耗，提供最高性能。秉持业界领先的混合信号技术优势和客户支持，PMC致力于推动服务器及存储系统解决方案的升级。Adaptec by PMC™存储方案可保护、加速及调节在I/O路径传输过程中的数据。PMC提供高性能、互通、可靠的存储方案与领先的技术支持服务。PMC的产品能够帮助客户进行存储网络革新，以满足下一代数据中心和云服务的需求, 包括PMC领先的SAS IO和闪存控制器、扩展器以及Adaptec by PMC RAID阵列卡及HBA.
2014年8月，PMC推出Flashtec NVRAM加速卡。
NVRAM加速卡结合了DRAM高速及耐写特性以及NAND闪存的非易失性，实现的性能十倍于最快速的固态盘（SSD），提供的IOPS千万次每秒，延迟则低于微秒。该解决方案基于业界标准的NVMe接口，实现了即插即用的PCIe连接，从而优化了CPU利用率，并将系统性能推向极致。 Flashtec NVRAM加速卡在DRAM和PCIe SSD之间建立了一个新存储层级，性能优异、可靠性超高，适用于需要高性能及高可靠性的任务关键型应用。

电信
不断创新的光网络方案，以应对大数据的急速增长。
伴随着世界进入大数据时代和100G的部署， 连接数据中心的光传输网络逐步进入人们的视线，以提供高速、高效和可靠的云服务。 PMC领先的技术解决方案，包括最新的DIGI 120G城域OTN处理器，能够助力城域光网的转型，实现虚拟化带宽。PMC 高性能、灵活的架构为客户从SONET/SDH过渡至可扩展的OTN设备提供有效工具。 PMC高集成度、低功耗的单芯片架构，可实现全新分组传输和交换路由器设备之间的城域OTN连接。PMC是世界领先的光纤接入系统级芯片提供商，拥有适用于所有协议、可互通的端到端解决方案。其解决方案集创新性和可靠性为一体，提供超高速互联网接入，且同时支持高清IPTV和VoIP服务。

移动
下一代移动回程和射频平台解决方案，铸就4G LTE部署基石。
PMC可通过低功耗、高集成、可提高频谱容量的移动射频基站方案实现LTE部署。 其射频拉远（RRH）系统级芯片使客户能够以更低功耗在更小封装尺寸上提供更多的功能。
PMC是业界领先的移动回程网络处理器提供商。 可编程、单架构以及定制化的网络软件可助力客户快速、简便地满足全球设备需求。

Microsemi在2016年初完成收购PMC-Sierra。

PMC-Sierra was a global fabless semiconductor company with offices worldwide that develops and sells semiconductor devices into the storage, communications, optical networking, printing, and embedded computing marketplaces.

On Jan 15 2016, Microsemi Corporation completed acquisition of PMC-Sierra through Microsemi's subsidiary Lois Acquisition.

Sierra Semiconductor was founded in 1984 in San Jose, California by James Diller. It received funding on January 11, 1984 from Sequoia Capital, and went public in 1991.

Pacific Microelectronics Centre (PMC) in Burnaby, British Columbia, Canada, was spun off from Microtel Pacific Research (the research arm of BC TEL at the time) to develop Asynchronous Transfer Mode (ATM) and later SONET integrated circuits (chips). With investment from Sierra Semiconductor, PMC was established in 1992 as a private company focused on providing networking semiconductors, and became a wholly owned, independently operated subsidiary of Sierra Semiconductor in 1994. Microtel is a part of Verizon Communications.

In 1995, using ideas from UBC Electrical Engineering students, PMC revolutionized the optical networking chipset market with the first OC-12 (622 Mbps) S/UNI transceiver chips. This circuit-design breakthrough put the company 3 years ahead of Bell Labs in its optical transceiver development.

In August 1996, Sierra Semiconductor announced its decision to exit the personal computer modem chipset business, to restructure its other non-networking products and focus on its networking products. 150 employees were made redundant. In late 1996, it acquired Bipolar Integrated Technology in Beaverton, Oregon, for about $10 million to enter the Ethernet business. The headquarters was moved to Burnaby, and in June 1997, PMC Sierra overtook its parent, Sierra Semiconductor, changing its name to PMC-Sierra. It acquired Integrated Telecom Technology Inc., San Jose, for $55 million in cash and stock in 1998.

Between 2001 and 2015 the company was reported as having multiple rounds of layoffs. In 2001, 350 employees, or 24% of total workforce, were laid off. Then in January 2003, 176 employees were laid off and in June 2005, 89 employees were laid off. In August 2006, 30 to 40 employees were laid off. In 2007 two rounds of layoffs happened, first in March 2007, 175 employees were laid off and then in December 2007, 18 employees were laid off. In July 2015, roughly 200 employees were laid off as part of a restructuring measure.

In May 2006, PMC-Sierra acquired Passave, Inc., a developer of system-on-chip semiconductors for the fiber to the home access market in a stock-for-stock transaction valued at approximately $300 million. Passave was headquartered in Boston and had a development center in Tel Aviv, Israel. On October 22, 2010, PMC-Sierra acquired Wintegra Inc. for $240 million. Wintegra had 165 employees with the majority of its development team located in Raanana, Israel, and Austin, Texas. A further acquisition was made on the 29th of May 2013 when PMC acquired IDT’s Enterprise Flash Controller Business.

On September 4, 2014 PMC Licenses HP Smart Array Intellectual Property to Accelerate Growth in Server Storage Solutions.

During the fall of 2015, both Skyworks Solutions and Microsemi were attempting to acquire PMC-Sierra. On November 24, 2015, Microsemi announced that they had entered into an agreement to acquire PMC-Sierra.

PMC-Sierra provides broadband communications and storage semiconductors for metro, access, fiber to the home, wireless infrastructure, enterprise and channel storage, laser printers and customer premises equipment. PMC has more than 250 different semiconductor devices that are sold to equipment manufacturers, who in turn supply their equipment to communications network service providers and enterprises. As a fabless semiconductor company, PMC-Sierra designs and tests products, but outsources wafer fabrication and assembly functions to third party suppliers.

PMC-Sierra's customers include HP, EMC Corporation, Huawei, Cisco, Alcatel-Lucent, Fujitsu, Hitachi, Mitsubishi, ZTE and Juniper.

Storage
PMC-Sierra offers products for storage networks and systems. The company provides an interconnect and controller product family for SAS and SATA storage systems and server computer RAID controllers. PMC-Sierra provides Fibre Channel controller and system interconnect products. PMC-Sierra acquired the channel storage business from Adaptec. This business was named "Adaptec by PMC" and makes SAS/SATA RAID Adapters. In July 2013 PMC completed the acquisition of IDT's Flash controller business and in August 2014 introduced the Flashtec line of non-volatile memory drives.

Communications
PMC-Sierra offers communication ICs for metro access, metro transport, FTTH/PON, Ethernet over SONET/SDH, Optical Transport Network (OTN) and wireless base transceiver stations (BTS). PMC-Sierra sells products for what is known as Ethernet in the first mile, which generally uses a passive optical network to residential areas. PMC-Sierra semiconductor devices allow wireless service providers to deploy wireless mobile phone network equipment. This includes MIPS-based network processors for wireless back haul and radio frequency integrated circuits for wideband radio modules. The company's UniTRX chipsets are highly integrated, low-power RFICs for wideband radio modules that operate in the 400 MHz to 4 GHz frequency range. These solutions address the performance requirements of 3GPP and 3GPP2 macro base station radio transceivers and support multiple standards such as MC-GSM, cdma2000®, WCDMA, and LTE.

The company's DIGI-G4 chipset is PMC’s latest OTN processor, and it enables the transition to 400G line cards in OTN switched metro networks. It is the industry’s densest single-chip 4x100G OTN processor with 50 percent less power per port. In March 2015 the PMC DIGI-G4 OTN processor was awarded a Lightwave Innovation Award  with the judges citing "...substantial new features, technologies, and capabilities included in the upgrade..."

Printers
PMC-Sierra has discrete and system-on-chip products for both laser and multi-function printers.