SAN FRANCISCO -- Intersil ( ISIL) grew sales 17% in the fourth quarter, and said that the company was seeing normal patterns of demand despite the economic uncertainty. Intersil said it earned $40.3 million, or 31 cents a share, compared with $38.8 million, or 28 cents a share at this time last year. Excluding certain charges, Intersil said it earned 39 cents a share. Analysts polled by Thomson Financial were looking for 38 cents a share, excluding stock option compensation expenses. Intersil's revenue of $212.6 million was up from the $181.1 million at this time last year, and slightly ahead of the average analyst expectation of $210.3 million. Shares of Intersil slipped 2%, or 47 cents, to $22.75 in extended trading Wednesday. "We are in a period of macro-economic uncertainty for the industry," CEO Rich Beyer said in a statement. "However, demand for our products is basically consistent with normal seasonality. In the first quarter, we typically experience a sequential decline in our consumer and computing markets. As a result we currently anticipate Intersil's revenue for the first quarter to be down 3% to 6%," Beyer said. The guidance suggests a range of roughly $200 million to $206 million in first-quarter revenue. Wall Street was looking for $203 million. Intersil said adjusted EPS will range between 35 cents and 36 cents, vs. the Street's 36 cents expectation.