Exhibit 99.1

PLX Technology, Inc. Chief Executive Officer Adopts 10b5-1 Share Trading Plan

    SUNNYVALE, Calif.--(BUSINESS WIRE)--April 28, 2005--PLX
Technology, Inc. (Nasdaq:PLXT) today announced that Michael J.
Salameh, chief executive officer, has adopted a prearranged trading
plan in accordance with guidelines specified by Rule 10b5-1 under the
Securities and Exchange Act of 1934 and the company's policies with
respect to insider sales.
    Rule 10b5-1 plans permit insiders to sell fixed portions of their
holdings over a designated period of time by establishing the
prearranged written plans at a time when they are not in possession of
material non-public information. Such programs provide for regular
selling of a predetermined, fixed number of company shares in order to
gradually diversify the individual's investment portfolio, minimize
the market effect of share sales by spreading them out over an
extended period of time and avoid concerns about initiating
transactions while in possession of material non-public information.
    The maximum number of PLX common stock and options to be sold by
Mr. Salameh under this plan, beginning in July of 2005 and ending in
August of 2006, is approximately 184,000, or 16 percent of Mr.
Salameh's current PLX holdings, including all stock options held. No
shares have been sold under the plan to date. Any transactions under
the plan will be disclosed publicly through Form 144 and Form 4
filings with the Securities and Exchange Commission.

    About PLX

    PLX Technology, Inc. (www.plxtech.com), based in Sunnyvale,
Calif., USA, is the leading supplier of standard I/O interconnect
silicon to the communications, server, storage, embedded-control, and
consumer industries. The PLX solution provides a competitive edge to
customers through an integrated combination of high-performance
silicon, hardware and software design tools. These innovative
solutions enable customers to develop products with industry-leading
performance and functionality. Furthermore, the combination of PLX
product features, supporting development tools and partnerships allows
customers to bring their designs to market faster. PLX PCI, PCI-X, PCI
Express, and USB interconnect chips are designed into a wide variety
of communications, server, storage, embedded-control, and consumer
products.

    CONTACT: PLX Technology, Inc.
             Rafael Torres, CFO, 408-774-9060
             rtorres@plxtech.com
                or
             CommonGround Communications for PLX
             Jerry Steach, 415-222-9996
             jsteach@plxtech.com