UPDATE 1-Xilinx has lower quarterly net profit

(Adds revenue and gross margin forecast for current quarter, stock price, other details)

SAN FRANCISCO, July 16 (Reuters) - Programmable chipmaker Xilinx Inc (XLNX.O) on Wednesday posted a slightly lower quarterly net profit due mainly to restructuring charges but sales of new microchips rose 15 percent.

The company also gave a forecast that was largely in line with current analysts' estimates but shares slipped 2 percent in extended trade after Xilinx reported results.

Xilinx said first fiscal quarter net income fell to $83.9 million from $84.3 million in the year ago period. Per share earnings rose to 30 cents a share, on fewer shares outstanding, from 28 cents a share a year ago. The results reported on Wednesday included 7 cents per share in charges.

Revenue rose 9 percent to $488.2 million from $445.9 million.

Sales of new products rose 15 percent from the prior quarter, representing 42 percent of total sales, up from 28 percent, in the year-ago quarter.

Xilinx's chief rival Altera Corp (ALTR.O) on Tuesday reported a higher quarter profit on strong sales and lower costs and said there could be some seasonal weakness in the third calendar quarter but expected growth in demand from wireless carriers in the fourth quarter.

For the current, second quarter, Xilinx said it expected revenue to be in a range of up 1 percent to down 3 percent from the previous period, which would be $493.1 million to $473.6 million.

Analysts currently expect revenue in the second fiscal quarter of $483.0 million, according to Reuters Estimates.