Cirrus Logic is closing an integrated-circuit design center in Oro Valley and moving those operations to Austin, Texas.

Of the roughly 45 workers at the facility at 8950 N. Oracle Road, about 20 employees were offered positions in Austin, and the rest "are no longer with the company," Cirrus Logic said.

The move comes less than three months after Austin-based Cirrus Logic sold its Tucson-based Apex Precision Power business to private investors for $26 million, re-establishing the locally founded analog electronics company as Apex Microtechnology Inc.

The Oro Valley operation of Cirrus Logic focused on motor-control circuits. Overall, Cirrus Logic specializes in analog and digital signal processing for audio and energy applications. One of the company's biggest customers is Apple, which uses Cirrus audio processing chips for its iPads and iPhones.

Apex, which employs about 80 workers, specializes in analog electronics mainly for industrial applications.

Cirrus Logic President and CEO Jason Rhode said in prepared remarks that the decision to close the Oro Valley operation wasn't made lightly, but having the motor-control product development unit based in the company's Austin headquarters "will strengthen our focus and maximize our product development efficiency."

A company spokesman said the Oro Valley operation formerly reported to the Apex business unit in Tucson.

"This is really about getting the whole team together," said Bill Schnell, public-relations manager for Cirrus Logic.

About half of the employees offered positions in Austin had taken advantage of the transfer offer as of Monday, Schnell said. The company said it expects to vacate the Oro Valley facility by Dec. 31.

Contact Assistant Business Editor David Wichner at or 573-4181.