January 25, 2007

Judith Onton

Dear Judith:

I am pleased to offer you a position with Cortina Systems, Inc. (the "Company") as Vice President, Human Resources, reporting to Amir Nayyerhabibi, Chief Executive Officer. You will receive an annualized base salary equivalent to $162,000 for your services, which will be paid in accordance with the Company's normal payroll procedures, subject to applicable withholding and deductions. You will also be eligible to participate in the Cortina Management Incentive Plan. As a Company employee, you will also be eligible for all employee benefits made available to Company employees generally, pursuant to the terms of applicable Company benefit plans, as they may exist from time to time.

Subject to the approval of the Board of Directors of the Company (the "Board"), you will be granted an option (the "Option") to purchase 550,000 shares of the Company's common stock pursuant to the terms of the Company's 2001 Equity Incentive Plan, as amended from time to time (the "Plan"), and a form of stock option grant notice and stock option grant agreement to be issued to you (collectively, the "Option Agreement"). The Option will be exercisable at a per share exercise price equal to the fair market value of a share of Company common stock on the date that the option is granted, as determined by the Board in its sole discretion. The Option shall be subject to the vesting schedule set forth in the Plan and the Option Agreement, including accelerated vesting upon a Change of Control (as defined in the Plan).

We have agreed that you will be working a 4 day work week with Fridays off. However, you will be flexible as business requires. We have also agreed that you will be able to take up to 4 weeks of unpaid time off a year in addition to PTO.

You should be aware that your employment with the Company is for no specified period and constitutes at will employment. As a result, you are free to resign at any time, for any reason or for no reason. Similarly, the Company is free to conclude its employment relationship with you at any time, with or without cause. Normal working hours are from 9:00 a.m. to 6:00 p.m., Monday through Friday. As an exempt salaried employee, you will be expected to work additional hours as required by the nature of your work assignments.

For purposes of federal immigration law, you will be required to provide to the Company documentary evidence of your identity and eligibility for employment in the United States. Such documentation must be provided to us within three (3) business days of your date of hire, or our employment relationship with you may be terminated.

As a condition to your employment with the Company, you will be required to sign the Company's standard Proprietary Information and Inventions Agreement, a copy of which is enclosed. You agree that you will not bring onto Company premises any unpublished documents or property belonging to any former employer or other person to whom you have an obligation of confidentiality. You will also be expected to abide by all Company policies set forth in the Company's Employee Handbook and in effect from time to time.

January 25, 2007

By signing this letter agreement (the "Agreement"), you represent to the Company that your signing this Agreement and providing employment services to the Company as contemplated herein does not and will not violate any agreement you have with your current employer or any other third party.

To ensure the rapid and economical resolution of disputes that may arise in connection with your employment with the Company, you and the Company agree that any and all disputes, claims, or causes of action, in law or equity, arising from or relating to the enforcement, breach, performance, execution or interpretation of this Agreement, your employment, or the termination of that employment, shall be resolved, to the fullest extent permitted by law, by final, binding and confidential arbitration in San Jose, California conducted by a single arbitrator with JAMS (formerly, "Judicial Arbitration and Mediation Services) or its successor, under the then-applicable JAMS rules. You and the Company each hereby acknowledge that by agreeing to this arbitration procedure, both parties are waiving the right to resolve any such dispute through a trial by jury or judge or administrative proceeding. The arbitrator shall: (a) have the authority to compel adequate discovery for the resolution of the dispute and to award such relief as would otherwise be permitted by law; and (b) issue a written arbitration decision including the arbitrator's essential findings and conclusions and a statement of the award. The arbitrator shall be authorized to determine if an issue is subject to this arbitration obligation, and to award any or all remedies that the parties would be entitled to seek in a court of law. The Company shall pay all JAMS' arbitration fees. Nothing in this Agreement is intended to prevent any party from obtaining injunctive relief in court to prevent irreparable harm pending the conclusion of any such arbitration.

To indicate your acceptance of the Company's offer, please sign and date this letter in the space provided below, sign the enclosed Proprietary Information and Inventions Agreement, and return them to me. A duplicate original is enclosed for your records. This letter, along with the Proprietary Information and Inventions Agreement, set forth the terms of your employment with the Company and supersede any prior representations or agreements, whether written or oral (including the offer letter previously issued to you). This letter may be executed in any number of counterparts, each of which shall be an original, but all of which together shall constitute one instrument. This letter may not be modified or amended except by a written agreement, signed by an officer of the Company and by you.

January 25, 2007

If this Agreement is acceptable to you, we would like you to start work on August 7, 2006.

We look forward to working with you at Cortina Systems, Inc.

Cortina Systems, Inc.
/s/ Amir Nayyerhabibi
Amir Nayyerhabibi,
President & CEO

24th day of Jan., 2007.    
/s/ Judith Onton     Feb. 1, 2007
Judith Onton     Start Date

Enclosures:   Duplicate Original Letter
  Employment, Confidential Information, and Invention Assignment Agreement

Source: OneCLE Business Contracts.