Visitors take pictures next to the Intel logo at Intel headquarters in Santa Clara, Calif.

Intel has stopped its talks with Altera about a potential acquisition, according to sources familiar with the situation.



Altera stock fell about 10 percent in pre-market trading. When news of the talks first broke in March, Altera stock posted a 28 percent jump.

The two companies have not spoken in more than a week, sources said, as neither party could agree on a price.

Read More Altera shares jumped 28% on Intel interest



Those sources said Intel's offer was in the neighborhood of the low $50-range per share, and that the talks had taken place over several months.

For its part, Intel stock traded down more than 2 percent in the pre-market trade.

Another semiconductor company, , saw about a 3 percent pre-market gain—potentially on speculation that it could be the next takeover target for Intel.

—CNBC's David Faber contributed to this report.