<TABLE> <S> <C>
<ARTICLE> 5
<LEGEND>
Exhibit 27.1
CASTELLE AND SUBSIDIARIES
Financial Data Schedule
This schedule contains summary financial information extracted from the
Company's Financial Statements for the three month period ending June 30, 2000
included in the Company's Form 10-Q filed August 14, 2000 and is qualified in
its entirety by reference to such statements.
</LEGEND>
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 3-MOS
<FISCAL-YEAR-END> DEC-31-1999
<PERIOD-END> JUN-30-2000
<CASH> 4,761
<SECURITIES> 0
<RECEIVABLES> 2,072
<ALLOWANCES> (158)
<INVENTORY> 1,426
<CURRENT-ASSETS> 8,266
<PP&E> 1,657
<DEPRECIATION> (1,346)
<TOTAL-ASSETS> 8,647
<CURRENT-LIABILITIES> 4,199
<BONDS> 0
0
0
<COMMON> 28,984
<OTHER-SE> (24,536)
<TOTAL-LIABILITY-AND-EQUITY> 8,647
<SALES> 3,760
<TOTAL-REVENUES> 3,760
<CGS> 1,308
<TOTAL-COSTS> 1,308
<OTHER-EXPENSES> 2,237
<LOSS-PROVISION> 0
<INTEREST-EXPENSE> (4)
<INCOME-PRETAX> 211
<INCOME-TAX> 0
<INCOME-CONTINUING> 211
<DISCONTINUED> 0
<EXTRAORDINARY> 0
<CHANGES> 0
<NET-INCOME> 211
<EPS-BASIC> 0.04
<EPS-DILUTED> 0.04
</TABLE>