TowerJazz’s Customer SiTime Named the Fastest Growing Semiconductor Company in North America by Deloitte’s Technology Fast 500[TM]

NEWPORT BEACH, California, December 18, 2012 /PRNewswire/ –

TowerJazz, the global specialty foundry leader today announced its congratulations to
its customer, SiTime Corporation, an analog semiconductor company that is revolutionizing
the timing market, for being named the fastest growing semiconductor company in North
America, based on Deloitte’s 2012 Technology Fast 500. This ranking includes the 500
fastest growing technology, media, telecommunications, life sciences and clean technology
companies in North America. Technology Fast 500 winners are selected based on the
percentage of fiscal year revenue growth from 2007 to 2011. SiTime ranked 38th overall
with revenues up 3853 percent during this period.

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For a number of years, SiTime has been utilizing TowerJazz’s 200mm wafer foundry in
Newport Beach, CA to volume produce its silicon MEMS oscillator products, designed to
replace traditional quartz oscillators. SiTime’s products offer unsurpassed performance,
reliability and flexibility, with the lowest cost of ownership, and are being rapidly
adopted by major electronics companies worldwide.

SiTime first announced a partnership with Jazz Semiconductor to bring its silicon MEMS
oscillators to market in 2006, prior to Jazz’s merger with Tower Semiconductor. Jazz was
one of the first pure-play CMOS foundries with MEMS manufacturing capability allowing for
the industrial scaling of MEMS products in the commercial CMOS foundry environment. Today,
as a combined global company, TowerJazz is also pursuing other MEMS technologies,
including RF MEMS, for both discrete product manufacturing and for integration with
existing TowerJazz RF CMOS, HV CMOS and SiGe BiCMOS technologies.

“SiTime’s innovative silicon MEMS timing solutions are transforming the decades-old
timing industry. By replacing quartz-based timing products, SiTime’s MEMS solutions bring
a multi-billion dollar frequency control market to the semiconductor industry. Unlike
quartz, SiTime’s MEMS timing solutions are manufactured in standard semiconductor fabs,
ensuring easy availability and extremely large capacity,” said Pavan Gupta, Vice President
of Operations at SiTime. “We are extremely pleased with this amazing achievement and we
would like to thank TowerJazz for all of their support. Our relationship with TowerJazz
has successfully allowed SiTime to revolutionize the timing market. We look forward to
continuing our close relationship with TowerJazz.”

“Through our strategic partnership, we are proud to have delivered significantly more
than 100 million MEMS resonators to SiTime and we are pleased with the recognition SiTime
has received on Deloitte’s Technology Fast 500. As a longtime partner of SiTime, our
collaboration demonstrates the successful and rapid implementation of 200mm MEMS
manufacturing, including both prototype and volume production,” said Dr. Marco Racanelli,
Senior Vice President & GM of RF and High Performance Analog Business Group, TowerJazz.

TowerJazz continues to strengthen its portfolio of specialty silicon technology,
consisting of MEMS, analog and RF CMOS, high speed SiGe, and high voltage technology,
among others, enhancing the ability of its customers to create and bring to market more
highly integrated analog products.

About SiTime

SiTime Corporation, an analog semiconductor company, offers MEMS-based silicon timing
solutions that replace legacy quartz products. With 80% market share and over 120 million
devices shipped, SiTime is driving the $6 Billion timing market’s transition to 100%
silicon-based timing. SiTime’s configurable solutions enable customers to differentiate
their products with higher performance, reduced size and better reliability. The rich
feature set and flexibility of our solutions allows customers to consolidate their
supply-chain, reducing cost of ownership and time to market. By using standard
semiconductor processes and high volume plastic packaging, SiTime offers the best
availability and shortest lead times in the industry. Top-tier manufacturers are
experiencing these benefits and recognize SiTime as The Smart Timing Choice(TM).

About TowerJazz

Tower Semiconductor Ltd. (NASDAQ: TSEM, TASE: TSEM), its fully owned U.S. subsidiary
Jazz Semiconductor Ltd., and its fully owned Japanese subsidiary TowerJazz Japan, Ltd.,
operate collectively under the brand name TowerJazz, the global specialty foundry leader.
TowerJazz manufactures integrated circuits with geometries ranging from 1.0 to
0.13-micron, offering a broad range of customizable process technologies including: SiGe,
BiCMOS, Mixed-Signal and RFCMOS, CMOS Image Sensor, Power Management (BCD), and
Non-Volatile Memory (NVM) as well as CMOS and MEMS capabilities. TowerJazz also offers a
world-class design enablement platform that complements its sophisticated technology and
enables a quick and accurate design cycle. In addition, TowerJazz provides (TOPS)
Technology Optimization Process Services to IDMs as well as fabless companies that need to
expand capacity, or progress from an R&D line to a production line. To provide multi-fab
sourcing, TowerJazz maintains two manufacturing facilities in Israel, one in the U.S., and
one in Japan with additional capacity available in China through manufacturing
partnerships. For more information, please visit http://www.towerjazz.com.

Safe Harbor Regarding Forward-Looking Statements

This press release includes forward-looking statements, which are subject to risks and
uncertainties. Actual results may vary from those projected or implied by such
forward-looking statements. A complete discussion of risks and uncertainties that may
affect the accuracy of forward-looking statements included in this press release or which
may otherwise affect TowerJazz’s business is included under the heading “Risk Factors” in
Tower’s most recent filings on Forms 20-F, F-3, F-4 and 6-K, as were filed with the
Securities and Exchange Commission (the “SEC”) and the Israel Securities Authority and
Jazz’s most recent filings on Forms 10-K and 10-Q, as were filed with the SEC,
respectively. Tower and Jazz do not intend to update, and expressly disclaim any
obligation to update, the information contained in this release.

        TowerJazz Media Contact: Lauri Julian | +1-949-435-8181 |
         lauri.julian@towerjazz.com
        TowerJazz Investor Relations Contact: Noit Levi | +972-4-604-7066 |
         noit.levi@towerjazz.com

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SOURCE TowerJazz