EXHIBIT 99.4


                        SYMMETRICOM COMPLETES SALE OF
                         LINFINITY MICROELECTRONICS
                          TO MICROSEMI CORPORATION
                                        

SAN JOSE, California -- April 14, 1999 -- Symmetricom (NASDAQ: SYMM) announced
today that it completed the sale of its Linfinity Microelectronics Inc.
subsidiary to Microsemi Corporation (NASDAQ: MSCC), effective April 14, 1999.

Under the agreement, Symmetricom sold all of the outstanding equity in Linfinity
Microelectronics to Microsemi for approximately $24.1 million in cash, of which
approximately $1.1 million is subject to an escrow agreement.

This transaction, which concludes Symmetricom's previously announced efforts to
secure a strategic partnership for Linfinity Microelectronics, enables the
company to focus on its network synchronization, timing and location business.

Symmetricom (NASDAQ: SYMM) provides advanced network synchronization products
that play a critical role in the operation and quality of service of
sophisticated telecommunications networks. Symmetricom's synchronization and
timing equipment is installed in telecommunications offices in over 50 countries
worldwide. Global customers include network operators and network service
providers. The company is developing products based on its proprietary Global
Positioning System (GPS), Bestime(TM) intelligent clock, and Powerhelix(TM)
antenna technologies to address synchronization, timing and location needs of
global communications markets.