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.

About Micrel

Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high performance linear and power, LAN and timing and communications markets. The Company's products include advanced mixed-signal, analog and power semiconductors; high performance communication, clock management, Ethernet switch and physical layer transceiver ICs. Company customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products. Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and advanced technology design centers situated throughout the Americas, Europe and Asia. In addition, the Company maintains an extensive network of distributors and reps worldwide. Web: www.micrel.com. For further information, contact Ray Wallin at: Micrel, Incorporated, 2180 Fortune Drive, San Jose, California 95131, (408)944-0800; or visit the Micrel website at: www.micrel.com