<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
FINANCIAL STATEMENTS OF ALPHA INDUSTRIES, INC. AND SUBSIDIARIES AS OF AND FOR
THE THREE MONTHS ENDED JUNE 27, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENT. THIS SCHEDULE HAS BEEN UPDATED TO REFLECT
THE ACQUISITION OF NETWORK DEVICE, INC. ON APRIL 24, 2000.

<MULTIPLIER> 1,000
<CURRENCY> U.S. DOLLARS

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          APR-02-2000
<PERIOD-START>                             MAR-29-1999
<PERIOD-END>                               JUN-27-1999
<EXCHANGE-RATE>                                      1
<CASH>                                          73,527
<SECURITIES>                                    61,974
<RECEIVABLES>                                   25,561
<ALLOWANCES>                                       785
<INVENTORY>                                      9,999
<CURRENT-ASSETS>                               178,076
<PP&E>                                         116,027
<DEPRECIATION>                                  64,949
<TOTAL-ASSETS>                                 230,788
<CURRENT-LIABILITIES>                           17,705
<BONDS>                                            462
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        10,365
<OTHER-SE>                                     197,227
<TOTAL-LIABILITY-AND-EQUITY>                   230,788
<SALES>                                         38,653
<TOTAL-REVENUES>                                38,653
<CGS>                                           21,656
<TOTAL-COSTS>                                   33,779
<OTHER-EXPENSES>                                     8
<LOSS-PROVISION>                                    69
<INTEREST-EXPENSE>                                (320)
<INCOME-PRETAX>                                  5,186
<INCOME-TAX>                                     1,867
<INCOME-CONTINUING>                              3,319
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     3,319
<EPS-BASIC>                                       0.09
<EPS-DILUTED>                                     0.09