The acquisition will be a cash purchase with a total acquisition cost of approximately $122 million, including expenses, National said.
Robert Penn, senior vice president and general manager of National's communications and consumer group, said the acquisition will add advanced design and technology capabilities to the company's existing family of communications chips. ComCore's core products rely on powerful DSP (digital signal processing) chips.
"The marriage of [National's] expertise with ComCore's advanced algorithm science will position National as a world leader in the application of advanced DSP technology to communications," the company said in a statement.
National makes a variety of communications silicon, including Ethernet networking chips and chips for wireless products.
The semiconductor maker will expense an estimated $85 million to $95 million of this amount for "in-process research and development at the close of the transaction, which is expected by the end of the current quarter, ending May 31, subject to regulatory approvals."
ComCore is headquartered in Calabasas, California, northwest of Los Angeles, and employs about 40 people.