Exhibit 99.1




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NEWS RELEASE

                            SEMTECH TO ACQUIRE XEMICS
          Experts in Ultra Low Power, RF, Analog and Digital IC Designs
           Expected to be Accretive to Net Income within Two Quarters

                                                           5:00 a.m. PDT
                                                           Monday, June 20, 2005

        CAMARILLO,  CALIFORNIA,  June 20,  2005 - SEMTECH  CORPORATION  (NASDAQ:
SMTC),  a  leading  producer  of  high   performance   analog  and  mixed-signal
semiconductors,  today announced plans to acquire XEMICS SA, a fabless developer
of ultra-low power analog,  radio frequency (RF) and digital integrated circuits
(IC).

        XEMICS is a research and  development  (R&D)  intensive  company with 77
employees,  of which 56 are actively  engaged in the area of R&D. The company is
privately  held  and  based  in  Switzerland.   XEMICS  applies  its  low-power,
low-voltage   design   expertise   across  its  core   technologies   --  sensor
interfacing/data acquisition,  8-bit RISC microcontrollers,  RF transceivers and
audio Codecs.  These  capabilities are aimed at adding value in next generation,
highly integrated battery powered wireless and sensing applications.

        XEMICS  was  established  in 1997 as a spin out of the Swiss  Center for
Electronics and Microtechnology (CSEM). CSEM, which is funded by both government
and industry  sources,  carries out applied  research  and product  development.
XEMICS  works  closely  with CSEM on  commercializing  new  technologies  and is
expected to continue to do so after the acquisition.

        In calendar year 2004,  XEMICS generated net sales of about $23 million,
mostly from custom and  standard IC products for battery  powered  applications,
remote metering,  embedded systems and medical devices. Gross margin during this
period was 48 percent.

        The addition of XEMICS strategically enhances Semtech's competitive edge
in high performance  analog.  XEMICS offers  proprietary  technology,  including
patents and other  exclusive  IP;  access to applied  research;  and an existing
business  that is growing.  Semtech has market  presence and capital  resources;
relationships  with industry leaders; a roughly $225 million base of synergistic
product sales; and a worldwide  infrastructure of sales,  marketing and low cost
manufacturing resources.

        XEMICS  will  be  acquired  by  Semtech   International   AG,  Semtech's
wholly-owned  Swiss  subsidiary,  and will be known as the  Wireless and Sensing
Products business unit.







        Jason  Carlson,   Semtech's   President  and  Chief  Executive   Officer
commented,  "The  addition  of XEMICS  represents  an  exciting  convergence  of
technology  between  Semtech's key analog  disciplines  of power  management and
over-voltage  protection and XEMICS's core  capabilities  in designing ultra low
power building blocks.  In today's market,  integration of functions is critical
in winning new designs and XEMICS greatly broadens our capabilities."

        Alain Dantec, Chief Executive Officer of XEMICS said of the acquisition,
"Semtech's size and infrastructure  should accelerate the development of a broad
portfolio of new proprietary products based on XEMICS' unique technology."

        Mr. Carlson added, "We have established several expectations to come out
of the XEMICS  acquisition . First, we expect to generate and promote 2 or 3 new
product  lines from their  technology  over the next three or so years.  Second,
these products should contribute nicely to top line sales and net income growth,
with gross margin forecasted above 55 percent. Third, XEMICS is expected to give
us immediate  access to relatively new  end-markets,  such as  automotive,  home
security,  industrial  and  medical.  Finally,  we should be able to double  the
content Semtech offers to existing portable and communications customers."

Terms of the Transaction

        Semtech   International   AG  will  pay  $43  million  in  cash  to  the
shareholders  of XEMICS and has agreed to pay up to an additional $16 million if
certain performance milestones are met within a twelve month period ending April
30, 2006. The  transaction is expected to close within the next ten days. In the
second  quarter  that ends July 31,  2005,  Semtech  expects to incur a one-time
acquisition  related charge to earnings of an estimated $4 million to $5 million
for the  write-off  of  in-process  R&D.  Consistent  with  purchase  accounting
treatment of the acquisition,  other intangible items will be amortized over the
current  quarter and future periods.  The amount of acquisition  related charges
are  subject to the final  valuation  of  XEMICS.  Excluding  these  acquisition
related  items,  Semtech  expects the  transaction to be neutral to its earnings
initially and become accretive within two quarters.

Notice of Conference Call

        The Company will hold a conference  call on Wednesday,  June 22, 2005 at
1:15 pm PDT to discuss the acquisition.  Investors and other interested  persons
can  participate by calling  719-457-2641  or by accessing a free webcast of the
call via the investor  relations  section of Semtech's  website.  Soon after the
completion  of the call, a replay will be available  via the investor  relations
section of Semtech's website for 30 days.

About Semtech

        Semtech  Corporation  is a leading  supplier of analog and  mixed-signal
semiconductors  used in a wide range of computer,  industrial and  communication
applications.







Forward-Looking and Cautionary Statements

This release contains "forward-looking statements" within the meaning of Section
27A of the  Securities  Act of 1933,  as amended  (the  "Securities  Act"),  and
Section 21E of the Securities Exchange Act of 1934, as amended.  Forward-looking
statements are  statements  other than  historical  information or statements of
current condition and relate to matters such as the expected closing date of the
transaction,   the  expected  one-time  charge,   the  expected  impact  of  the
transaction  on  earnings,  future  financial  performance,  future  operational
performance,  and our plans,  objectives and expectations.  Some forward-looking
statements  may be identified by use of terms such as "expects,"  "anticipates,"
"intends," "estimates," "believes",  "projects",  "should",  "will", "plans" and
similar words.

        Forward-looking  statements  involve risks and uncertainties  that could
cause actual results to differ materially from those projected.  These risks and
uncertainties  include the  possibility  of a delay or failure in satisfying the
closing conditions,  the possibility of a greater than expected one-time charge,
the possibility of less than anticipated  cost savings,  and the complexities of
successfully  integrating the workforces and  technologies of the companies.  In
addition  to  considering   these  risks  and   uncertainties,   forward-looking
statements  should be considered in conjunction  with the cautionary  statements
contained in the "Risk  Factors"  section and elsewhere in the Company's  Annual
Report on Form 10-K for the fiscal  year ended  January 30,  2005,  in its other
filings  with the SEC, and in material  incorporated  therein by  reference.  In
light of the risks and uncertainties  inherent in forecasts of revenue and gross
margin and in other projected matters,  forward-looking statements should not be
regarded as  representations by the Company that its objectives or plans will be
achieved or that any of its operating  expectations or financial  forecasts will
be  realized.  The  Company  assumes  no  obligation  to update  or  revise  any
forward-looking  statements,  whether  as a result  of new  information,  future
events or otherwise.

        Investor Relations Contact

John Baumann, Treasurer, Telephone: 805-480-2010