SAN FRANCISCO -- Semiconductor stocks began the new year with a dud, thanks to a slew of downgrades from a Wall Street analyst.

Bank of America's Sumit Dhanda released bearish notes some of the chip sector's biggest names Wednesday, including Intel ( INTC), Advanced Micro Devices ( AMD) and Texas Instruments ( TXN).

The downgrades dragged down the entire semi sector, with the Philadelphia Stock Exchange Semiconductor Sector Index slipping 3% to 395 -- its lowest level in 16 months.

The news follows weak monthly sales data from the Semiconductor Industry Association on Monday, in which global chip sales posted the lowest sales growth in at least five years.

Cramer: Ignore the Semi Downgrades

The seasonally slow first half of 2008, and indications of a modest inventory build of PC motherboards, will limit near term upside for Intel, wrote Dhanda, even though the chipmaker's competitive positioning "has never looked better."

Dhanda downgraded Intel from a buy to a neutral rating, as he did with Texas Instruments, Analog Devices ( ADI), Semtech ( SMTC) and Power Integrations ( POWI).

AMD, LSI ( LSI) and National Semiconductor ( NSM) were all downgraded from neutral to sell ratings.

Shares of Intel dropped 5.7%, or $1.52, to $25.14 in midday trading, while Texas Instruments fell 4%, or $1.37, to $32.03.

AMD and LSI -- two of the chip sector's biggest losers in 2007 -- set fresh 52-week lows Wednesday. AMD sank 5.8% to $7.07, while LSI was down 7.3% to $4.92.

Dhanda wrote that despite AMD's steep selloff in 2007, it's still too early to call a bottom on the stock. The company will face even more challenging times in 2008, he said, due to market-share loss, cost structure pressures and optimistic profit margins.

Dhanda now expects AMD to lose $1.26 a share in 2008, instead of his previous estimate of a loss of 76 cents, and puts a $5 price target on the stock.

More from Technology

Listen: Will Smart Technologies Woo Millennials Back to Motorcycle Riding?

Listen: Will Smart Technologies Woo Millennials Back to Motorcycle Riding?

Pegasystems Founder Explains Why He Has One of the Hottest Tech Stocks Around

Pegasystems Founder Explains Why He Has One of the Hottest Tech Stocks Around

Tesla's $78,000 Model 3 Is a Bargain. Here's Why

Tesla's $78,000 Model 3 Is a Bargain. Here's Why

Tesla Model 3 Delivery Time Falls, but Will It Help the Stock?

Tesla Model 3 Delivery Time Falls, but Will It Help the Stock?

Baidu Stock Plummets After COO Qi Lu Resignation

Baidu Stock Plummets After COO Qi Lu Resignation