<ARTICLE>                                      5
<MULTIPLIER>                                   1000
       
                                            
<PERIOD-TYPE>                                  6-MOS
<FISCAL-YEAR-END>                              Dec-31-1997
<PERIOD-END>                                   Jun-30-1997
<CASH>                                         1338
<SECURITIES>                                   16851
<RECEIVABLES>                                  12527<F1>
<ALLOWANCES>                                   0
<INVENTORY>                                    4698
<CURRENT-ASSETS>                               37542
<PP&E>                                         9121<F2>
<DEPRECIATION>                                 0
<TOTAL-ASSETS>                                 53090
<CURRENT-LIABILITIES>                          9289
<BONDS>                                        0
<PREFERRED-MANDATORY>                          0
<PREFERRED>                                    0
<COMMON>                                       88
<OTHER-SE>                                     38929
<TOTAL-LIABILITY-AND-EQUITY>                   53090
<SALES>                                        26098
<TOTAL-REVENUES>                               26098
<CGS>                                          13369
<TOTAL-COSTS>                                  13369
<OTHER-EXPENSES>                               4112<F3>
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             205
<INCOME-PRETAX>                                2778
<INCOME-TAX>                                   332
<INCOME-CONTINUING>                            0
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   2446
<EPS-PRIMARY>                                  .26
<EPS-DILUTED>                                  .26



<FN>
<F1>Net of  allowance  for doubtful  accounts,  consistent  with  balance  sheet
presentation.
<F2>Net of accumulated depreciation, consistent with balance sheet
presentation.
<F3>Research and development expenses
</FN>