EXHIBIT 99.1

                              SYMMETRICOM, INC.
                        UNAUDITED PRO FORMA CONDENSED
                     CONSOLIDATED FINANCIAL INFORMATION

On February 10, 1999, Symmetricom, Inc., a California corporation,
("Symmetricom" or "Registrant"), Linfinity Microelectronics Inc., a Delaware
corporation which is a subsidiary of Symmetricom, ("Linfinity"), Microsemi
Corporation, a Delaware corporation, ("Purchaser")and Micro-Linfinity
Acquisition Corporation, a Delaware corporation and wholly owned subsidiary of
Purchaser, ("Purchaser Sub") entered into an agreement and plan of
reorganization in which the Purchaser Sub shall be merged with and into
Linfinity upon satisfaction of conditions to consummation including approval of
the merger by Symmetricom's shareholders.

The following unaudited pro forma condensed consolidated balance sheet as of
December 31, 1998, and the unaudited pro forma condensed consolidated statements
of operations for the year ended June 30, 1998, and the six months ended
December 31, 1998 give effect to the disposition of Linfinity Microelectronics
Inc.

The unaudited pro forma condensed consolidated financial statements are intended
for informational purposes only and are not necessarily indicative of the future
financial position or future results of operations of the existing company, or
of the financial position or the results of operations of the existing company
that would have actually occurred had the disposition been in effect as of the
date or for the periods presented.

These unaudited pro forma condensed consolidated financial statements and the
accompanying notes should be read in conjunction with the historical
consolidated financial statements and the related notes thereto of registrant
contained in its 1998 Annual Report on Form 10-K and its Quarterly Report on
Form 10-Q for the quarter ended December 31, 1998.

 
 


                                                         SYMMETRICOM, INC.
                                Unaudited Pro Forma Condensed Consolidated Statement of Operations
                                                Six Months Ended December 31, 1998
                                             (In thousands, except per share amounts)

                                               Historical         Less
                                              -----------     ----------------
                                                                 Linfinity
                                              Symmetricom,    Microelectronics        Other               Pro
                                                 Inc.             Inc. (a)           Adjustments         Forma
                                              -----------     ----------------      -------------       ----------
                                                                                                     
Net sales ..................................   $ 60,202          $ 22,013          $   --               $ 38,189    
Cost of sales ..............................     35,487            15,565              --                 19,922  
                                               --------          --------          --------             --------    
       Gross profit ........................     24,715             6,448              --                 18,267    
Operating expenses:                                                                                                 
  Research and development .................      9,281             2,620              --                  6,661    
  Selling, general and administrative ......     14,764             4,277               159 (b)           10,646    
                                               --------          --------          --------             --------    
       Operating income (loss) .............        670              (449)             (159)                 960    
Interest income ............................        948                54               --                   894
Interest expense ...........................       (360)              (86)              (86)(c)             (360)   
                                               --------          --------          --------             --------    
       Earnings (loss) before income taxes .      1,258              (481)             (245)               1,494    
Income tax provision (benefit) .............        264              (154)             (104)(d)              314    
                                               --------          --------          --------             --------    
       Net earnings (loss) .................   $    994          $   (327)         $   (141)            $  1,180    
                                               ========          ========          ========             ========
                                                                                                                    
Basic earnings (loss) per share ............   $   0.06          $  (0.02)         $  (0.01)            $   0.08    
                                               ========          ========          ========             ========    
Weighted average shares outstanding--basic .     15,604            15,604            15,604               15,604    
                                               ========          ========          ========             ========    
                                                                                                                    
Diluted earnings (loss) per share ..........   $   0.06          $  (0.02)         $  (0.01)            $   0.08    
                                               ========          ========          ========             ========    
Weighted average shares outstanding--diluted     15,630            15,630            15,630               15,630    
                                               ========          ========          ========             ========     
 

Notes to Unaudited Pro Forma Condensed Consolidated Statement of Operations
(a)    To remove revenues and expenses of Linfinity operations.
(b)    To record corporate administrative costs previously allocated to
       Linfinity.
(c)    To remove intercompany interest income.
(d)    The Linfinity operating results reflect a provision for income taxes as
       if Linfinity was a separate taxpayer. For pro forma purposes, tax expense
       was recalculated on a pro forma basis for the Registrant without
       Linfinity. This adjustment represents the tax difference arising from
       this with and without calculation.

 
 

                                                         SYMMETRICOM, INC.
                                Unaudited Pro Forma Condensed Consolidated Statement of Operations
                                                     Year Ended June 30, 1998
                                             (In thousands, except per share amounts)

                                                Historical      Less
                                               -----------   ------------
                                                               Linfinity
                                               Symmetricom,  Microelectronics        Other             Pro
                                                  Inc.          Inc. (a)          Adjustments         Forma     
                                               -----------   ------------         ------------     ----------- 
                                                                                         
Net sales ..................................   $ 120,581        $  47,270          $   --           $  73,311    
Cost of sales ..............................      76,306           39,288              --              37,018    
                                               ---------        ---------          --------         ---------    
       Gross profit ........................      44,275            7,982              --              36,293    
Operating expenses:                                                                                              
  Research and development .................      18,810            6,423              --              12,387    
  Selling, general and administrative ......      30,586           11,496               624 (b)        19,714    
                                               ---------        ---------          --------         ---------    
       Operating income (loss) .............      (5,121)          (9,937)             (624)            4,192    
Interest income ............................       1,819              106                --             1,713    
Interest expense ...........................        (838)            (230)             (122)(c)          (730)   
                                               ---------        ---------          --------         ---------    
       Earnings (loss) before income taxes .      (4,140)         (10,061)             (746)            5,175    
Income tax provision (benefit) .............      (2,610)          (3,219)              550 (d)         1,159    
                                               ---------        ---------          --------         ---------
       Net earnings (loss) .................   $  (1,530)       $  (6,842)         $ (1,296)        $   4,016    
                                               =========        =========          ========         =========    
                                                                                                                 
Basic earnings (loss) per share ............   $   (0.10)       $   (0.43)         $  (0.08)        $    0.25    
                                               =========        =========          ========         =========    
Weighted average shares outstanding--basic .      15,845           15,845            15,845            15,845    
                                               =========        =========          ========         =========    
                                                                                                                 
Diluted earnings (loss) per share ..........   $   (0.10)       $   (0.43)         $  (0.08)        $    0.25    
                                               =========        =========          ========         =========    
Weighted average shares outstanding--diluted      15,845           15,845            15,845            15,989(e)    
                                               =========        =========          ========         =========     
 

Notes to Unaudited Pro Forma Condensed Consolidated Statement of Operations
(a)    To remove revenues and expenses of Linfinity operations.
(b)    To record corporate administrative costs previously allocated to
       Linfinity.
(c)    To remove intercompany interest income.
(d)    The Linfinity operating results reflect a provision for income taxes as
       if Linfinity was a separate taxpayer. For pro forma purposes, tax expense
       was recalculated on a pro forma basis for the Registrant without
       Linfinity. This adjustment represents the tax difference arising from
       this with and without calculation.
(e)    Weighted average shares outstanding -- diluted increased due to the
       dilutive effect of potential common shares outstanding during the period.


 
 

                                                         SYMMETRICOM, INC.
                                     Unaudited Pro Forma Condensed Consolidated Balance Sheet
                                                         December 31, 1998
                                                          (In thousands)

                                                     Historical        
                                                    ------------       
                                                                          Linfinity
                                                    Symmetricom,       Microelectronics      Other            Pro
                                                        Inc.                Inc. (a)       Adjustments       Forma
                                                    ------------       -----------------  ------------     ---------
                                                                                                 
ASSETS
Current assets:
Cash and cash equivalents ........................   $ 22,533          $   --            $ 19,900 (b)       $ 42,433      
Short-term investments ...........................     13,916              --                --               13,916
Accounts receivable, net .........................     16,164            (5,346)             --               10,818      
Inventories ......................................     15,157            (5,614)             --                9,543      
Other current assets .............................      8,790              (112)           (4,624)(d)          4,054      
                                                     --------          --------          --------           --------       
       Total current assets ......................     76,560           (11,072)           15,276             80,764   
                                                                                                                             
Property, plant and equipment, net ...............     36,287           (15,189)             --               21,098   
Other assets .....................................      1,133               (17)             --                1,116           
Net assets of Linfinity operations subject to sale        --             19,814           (19,814)(c)           --          
                                                     --------          --------          --------           --------       
       Total assets ..............................   $113,980          $ (6,464)         $ (4,538)          $102,978  
                                                     ========          ========          ========           ========       
                                                                                                                       
LIABILITIES AND SHAREHOLDERS' EQUITY                                                                                   
Current liabilities:                                                                                                   
Accounts payable .................................   $  5,479          $ (2,907)         $   --             $  2,572  
Accrued liabilities ..............................     16,200            (3,557)             --               12,643  
Current maturities of long-term obligations ......        553              --                --                  553    
                                                     --------          --------          --------           --------       
       Total current liabilities .................     22,232            (6,464)             --               15,768       
                                                                                                                            
Long-term obligations ............................      8,525              --                --                8,525 
Deferred income taxes ............................      1,954              --              (1,762)(d)            192       
                                                     --------          --------          --------           --------       
       Total liabilities .........................     32,711            (6,464)           (1,762)            24,485
                                                     --------          --------          --------           --------       

Shareholders' equity:   
Preferred stock         
Common stock .....................................     19,810              --                --               19,810 
Retained earnings ................................     61,459              --              (2,776)(e)         58,683       
                                                     --------          --------          --------           --------       
       Total shareholders' equity ................     81,269              --              (2,776)            78,493    
                                                     --------          --------          --------           --------       

                                                     --------          --------          --------           --------       
Total liabilities and shareholders' equity .......   $113,980          $ (6,464)         $ (4,538)          $102,978
                                                     ========          ========          ========           ========       
 

Notes to Unaudited Pro Forma Condensed Consolidated Balance Sheet
(a)    To remove assets and liabilities of the Linfinity operations which are
       subject to sale and reflect the net assets on the balance sheet as net
       assets of Linfinity operations.
(b)    To reflect cash proceeds from the sale of Linfinity, net of anticipated
       costs of $3.1 million.
(c)    To reflect net assets of Linfinity sold.
(d)    To establish a valuation allowance against net deferred tax assets in
       connection with the sale of Linfinity.
(e)    To adjust retained earnings to reflect the sale of Linfinity.