Footnotes / references Financials as of March 30, 2024[update].[1]
Cirrus Logic Inc. is an Americanfabless semiconductor supplier that specializes in analog, mixed-signal, and audioDSP integrated circuits (ICs). Since 1998, the company's headquarters have been inAustin, Texas.[2][3]
The company's audio processors and audio converters feature in audio and consumer entertainment products, including smartphones, tablets, laptops, digital headsets, automotive entertainment systems, home-theater receivers, and smart home applications, such as smart speakers. The company has over 3,200 customers including Ford, Harman International, Itron, LG, Lenovo, Onkyo, Marantz, Motorola, Panasonic, Pioneer, Samsung, SiriusXM, Sony, Apple, and Vizio.[4]
Suhas Patil founded the company as "Patil Systems, Inc." inSalt Lake City in 1981; it adopted the name "Cirrus Logic" when it moved toSilicon Valley in 1984.
Cirrus Logic has more than 3,900 patents issued and pending.[5]
Patil Systems, Inc., was founded in Salt Lake City, Utah, in 1981 bySuhas Patil, and in 1983 the company was reorganized by Patil,Kamran Elahian, and venture capitalist Fred Nazem, whose firm, Nazem and Company provided the company's first/start-up round of financing. Later the company was renamed as Cirrus Logic when it moved to Silicon Valley in 1984 to focus on solutions for the growing PC components market. Michael Hackworth was named president and chief executive officer in January 1985, and served as CEO until February 1999. It joined the Nasdaq market listing in 1989 (symbol: CRUS). Cirrus Logic acquiredCrystal Semiconductor, a supplier of analog and mixed-signal converter ICs, in 1991. In the early 1990s, Cirrus Logic became a supplier of PC graphics chips, audio converters and chips for magnetic storage products. David D. French joined Cirrus Logic, Inc. as president and chief operating officer in June 1998 and was named chief executive officer in February 1999. Soon after joining the company, through an acquisition strategy French repositioned the company into a premier supplier of high-performance analog and digital processing chip solutions for consumer entertainment electronics, and soon afterwards, M. Yousuf Palla joined as Vice President of Operations and Manufacturing, contributing further to its success. The company announced in April 2000 that it had completed moving its headquarters to Austin, Texas.[6] In June 2005, Cirrus Logic sold its video products operation to an investment firm, creating privately ownedMagnum Semiconductor. After French resigned in March 2007, Jason Rhode, formerly the vice president and general manager of Cirrus Logic's Mixed Signal Audio Division, was named president and CEO in May 2007. In 2014 Cirrus Logic boughtWolfson Microelectronics for approximately $467 million. In 2021, Cirrus Logic acquired Lion Semiconductor for $335 million.[7]
1998 – Cirrus Logic exits from the PC graphics card business.
1998 – David D. French joins company as president and chief operating officer in June and becomes chief executive officer in February 1999. In the fall, company spins out its communication business unit.
1999 – Cirrus Logic teams up withMicrosoft Corp. in a technology agreement for their Maverick TM chip line.[14]
1999 – Cirrus Logic joinedRockwell International Corp. in a collaboration for system-on-a-chip ICs using RISC processor cores fromARM Ltd. for industrial automation.[15]
2000 – Cirrus Logic moves its headquarters to Austin, Texas.
2001 – Cirrus Logic announces plan to begin exit from magnetic storage chip business.
2001 – Cirrus Logic acquires several start-up companies with technologies in video decoding, video encoding, wireless networking, and networked digital audio.
2005 – Cirrus Logic sells video product assets to investment firm, creatingMagnum Semiconductor (company maintains minority equity position).
2006 – Cirrus Logic developed a reference design for a High Definition mainstream audio/video reliever (HD-AVR) platform together with Genesis Microchip Inc..[16]
2007 – Jason Rhode, formerly vice president and general manager of Cirrus' Mixed-Signal Audio division, is named president and chief executive officer, replacing French who resigned in March. In July, Cirrus Logic acquiresApex Microtechnology, a provider of high-power products for industrial and aerospace markets. Cirrus Logic acquires audio chip companyTripath after they went bankrupt.
2012 – Company sells its hybrid product line in Tucson, Ariz., to a group of investors, creating Apex Microtechnology as a stand-alone company once again. In November, the company announces that it is moving its remaining product line team in Tucson to its Austin headquarters.
2012 – Cirrus Logic awardedDigiKey with the Distributor Partnership Award.[17]
2014 – Cirrus Logic acquires UK-based Wolfson Microelectronics, an audio IC company founded in 1984.
2018 – Cirrus Logic signed an agreement withApple for an active noise reduction chip for the next-generationAirPods.[18]
2019 – Cirrus Logic became a strategic partner with Silicon Catalyst.[19]
2021 – Jason Rhode steps down as CEO to be replaced by John Forsyth who was previously chief strategy officer.[20]
2021 – Cirrus Logic announced a collaboration with Elliptic to optimize the CS35L45 smart boosted amplifier using the Elliptic Labs’ AI Virtual Smart Sensor Platform.[21]
By the mid-1990s, when PCs had migrated to thePCI bus, Cirrus had fallen behindS3 andTrident Microsystems. When the announced release date of the GD5470 "Mondello" came and went, Cirrus's reputation in desktop PC-graphics suffered.[citation needed] Mondello development took a back seat to the GD5464 which was near completion and proved to be a much faster design with the use ofRambus. (Because of this Mondello never got off the ground.)
The company's final graphics chips, the GD546x "Laguna" series of PCI/AGP 3D-accelerators, were novel in that they were one of the few video cards to use RambusRDRAM. The patented use of tiled memory by the GD546x chips is still used by nearly all graphics processors today. However, like many other 2D and 3D chips at the time were gate limited by the process technology available at the time, the feature set of perspective-correcttexture mapping,bilinear filtering, single-passlighting,gouraud shading, andalpha blending, was incomplete compared to the next generation of 3D chips. The GD546x family was limited by CPU processing at the time, CPUs could not feed it enough triangles which was the real performance block. The raw processing power of the GD546x was nearly 2.5 million 25 pixel triangles per second, much faster than competitors.
When Intel announced they were entering the 3D market with thei740, Cirrus Logic exited the market, which at the time for Cirrus Logic was worth 500 million dollars annually. (Intel didn't catch up in performance for many years, the i740 was not widely accepted and did not win any major designs).
Cirrus Logic graphic cards are used in emulators. BothQEMU andBochs emulate the Cirrus CLGD 5446 PCI VGA-card, with Bochs additionally emulating the CL-GD5430 ISA card.[citation needed]
CL-GD510 + CL-GD520 – ISA SVGA "Eagle II" chipset; known for 100% CGA emulation (1988)
CL-GD5320 – ISA SVGA chipset (1990)
CL-GD5401 – ISA SVGA chipset, also known as Acumos VGA (AVGA1)
CL-GD5402 – ISA SVGA chipset, also known as Acumos VGA (AVGA2)
CL-GD5410 – ISA SVGA chipset, low-to-mid-end DRAM-based cards (accelerated), some laptop chipsets. Known for integrating graphics card components into one chip (built-in RAMDAC and clock generators) at an early point. (1991)[22]
CL-GD5421 – ISA SVGA chipset; highly integrated (15/16 bit RAMDAC + PLL), 1 MB
CL-GD5422 – Enhanced version of the CL-GD5420 (32-bit internal memory interface, 15/16/24 bit RAMDAC. An ISA video card carrying this chipset offered 1280×1024 interlaced max resolution.[23]
CL-GD5424 –VLB version of the CL-GD5422, but resembles the CL-GD5426 in some respects
CL-GD5425 – True color VGA controller with TV out
CL-GD5426 – HardwareBitBLT engine; ISA bus and VLB up to 2 MB of memory
CL-GD5428 – Enhanced version of the CL-GD5426; faster BITBLT engine
CL-GD5429 – Enhanced version of the CL-GD5428; supports higher memory clock and has memory-mapped I/O
CL-GD5430 – Similar to CL-GD5429, but with CL-GD543x core (32-bit host interface)
CL-GD5434 – PCI Alpine family chip with 64-bit internal memory interface; supports 64-bit mode only when equipped with 2 MB of video memory; commonly equipped with 1 MB, extendable to 2 MB (1994)
Cirrus Logic has anEmployee Resource Group called the Women’s Leadership Team which is made up of annually elected officers. The team provides community outreach programs as well as mentorship groups, book clubs andSTEM-related activities for girls and young women.[28] It had a robotics partnership with the Ann Richards School, in which Cirrus Logic committed $10,000 a year for three years. In 2023 the robotics team was made up of 10 girls, which increased to 30 in 2024.[29]
^"About Ambient". Archived fromthe original on 2000-03-01.In 1998 Cirrus Logic made a strategic decision to refocus [and so] spun-off their profitable PC Modem Business Unit. Employees purchased this division from Cirrus Logic in January of 1999
US$1.79 billion (2024)
US$343 million (2024)
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