About 80 employees of National Semiconductor Corp.'s staff of 1,400 at its West Jordan manufacturing plant will be laid off this week in a companywide restructuring attributed to depressed earnings and a decision to focus on its core semiconductor business.

Mary Coady, manager for corporate communications at National Semiconductor's Santa Clara, Calif., headquarters, said in a telephone interview the terminations will involve all levels of employees and job classifications but will likely not touch people working on assembly lines."Primarily affected are those not directly involved in manufacturing," said Coady - meaning business and corporate staff will be hardest hit.

She said terminated workers will receive severance pay, out-placement counseling, job referral and classes in interviewing and resume writing. Other resources, such as telephones and typewriters, will be made available to them, she said.

Coady said the company expects no further layoffs this year. "This is a difficult thing to do. We don't want to drag it out," she said.

The 80 West Jordan layoffs are Utah's share of the company's plan to lay off about 2,000 workers, or 5 percent of its worldwide work force.

In its latest fiscal quarter, which ended Nov. 28, National Semiconductor showed a loss of $25 million based on $705 million in revenue, compared to a loss of $11.6 million based on $640 million in revenue for the same period a year ago.

In a move to focus on semiconductors, the company has agreed to sell its Datachecker unit to ICL, a British company, and is selling half of its mainframe computer marketing subsidiary, National Advanced Systems, to Memorex PLC of the Netherlands. Both units are exempt from the layoffs because of their pending sale.

The layoffs will occur at all levels in Asia, Europe and the United States, with about 50 percent of the cuts taking place in the United States, Coady said.