Updated from 12:51 p.m. EDT

Shares of

Standard Microsystems

( SMSC) were among technology's winners Tuesday, rising 12.4% after the company lifted its first-quarter earnings and sales guidance.

The chipmaker now expects earnings of 13 cents to 16 cents a share, up from previous guidance of 8 cents to 12 cents a share. Sales, meanwhile, are now expected to be between $68 million and $69 million, up from earlier guidance of $63 million to $67 million. Analysts polled by Thomson First Call had been expecting earnings of 9 cents a share on sales of $64.7 million. Shares traded up $2.09 to $18.98.

Komag

( KOMG) rose 14.7% after the storage device component company said that second-quarter sales would be better than expected. The company expects sales of $161 million to $168 million, or sequential sales growth of 15% to 20%. Analysts are expecting sales of $146.6 million. Previously, the company said that sequential sales could be equal to or up to 10% higher than first-quarter results. Net margin is now expected to be about 15%, up from previous guidance of 13% to 15%.

Separately, Komag announced an expanded business relationship with

Western Digital

(WDC) - Get Report

, which includes a volume purchase agreement and an expansion of media production capacity. As a result, Komag will expand its media capacity by about 4 million disks per quarter. The new capacity should be fully in place by the end of the first quarter of 2006, the company said. Shares of Komag traded up $4.15 to $32.30.

Shares of

Monolithic Power Systems

(MPWR) - Get Report

rose 13.7% after the chipmaker lifted its second-quarter sales forecast. The company now expects sales of $19 million to $21 million, up from previous guidance of $17 million to $19 million. The one-analyst forecast called for sales of $18 million. Better-than-expected sales in two product families led to the revised outlook. Shares traded up $1 to $8.28.

Audible

( ADBL) rose 14.2% after the company and

XM Satellite Radio

( XMSR) said they would introduce a handheld device that is capable of playing both the XM service as well as Audible's spoken-word content. The product will be introduced some time during 2006. Financial terms of the deal were not disclosed. Shares of Audible traded up $2.31 to $18.64.

Shares of

8X8

(EGHT) - Get Report

rose 3.9% after the company announced a deal with

Pitney Bowes

(PBI) - Get Report

that would allow 8X8 to market its products to Pitney Bowes' small business customers. As part of the deal, 8X8 will offer its virtual office business class broadband phone service and its Packet8 videophone to Bowes' customers. Shares traded up 8 cents to $2.15.

Other technology movers included

Cisco Systems

(CSCO) - Get Report

, up 3 cents to $19.41;

Intel

(INTC) - Get Report

, down 31 cents to $26.86;

Microsoft

(MSFT) - Get Report

, up 14 cents to $25.51;

Sun Microsystems

(SUNW) - Get Report

, down 1 cent to $3.61;

Oracle

(ORCL) - Get Report

, down 6 cents to $12.59;

Sirius Satellite Radio

(SIRI) - Get Report

, down 5 cents to $5.84;

CMGI

( CMGI), down 32 cents to $1.95;

Apple Computer

(AAPL) - Get Report

, down $1.38 to $36.54;

Applied Materials

(AMAT) - Get Report

, down 24 cents to $16.58;

Google

(GOOG) - Get Report

, up $2.18 to $293.12;

Motorola

( MOT), up 21 cents to $18.13; and

Lucent Technologies

( LU), unchanged at $2.79.