MICREL SCHEDULES THIRD QUARTER 2012 EARNINGS RELEASE AND CONFERENCE CALL

Press Release

San Jose, CA, October 11, 2012- Micrel Inc., (Nasdaq:MCRL), an industry leader in high performance analog and high-speed mixed signal solutions, will announce financial results for the third quarter ended September 30, 2012 after the market closes on Thursday, October 25, 2012. In addition, the Company will host a conference call that day at 4:30 p.m. Eastern time (1:30 p.m. Pacific time). Chief Executive Officer Raymond Zinn and Chief Financial Officer Ray Wallin will present an overview of the second quarter financial results, discuss current business conditions, and respond to questions.

The call is available, live, to any interested party, on a listen-only basis, by dialing (866) 200-6965 and entering the participant code 71344414 followed by the # key. For international callers, please dial (646) 216-7221 and enter the participant code 71344414 followed by the # key. A live webcast will also be available at the 'Investors' section of Micrel's website at: www.micrel.com. An audio replay of the conference call will be available through November 1, 2012, by dialing (877) 764-8174 or (646) 583-7395 and entering the participant code 276611 followed by the # key.The webcast replay will also be available on the Company's website.