Exhibit 12.1

PMC-SIERRA, INC.

STATEMENT OF COMPUTATION OF RATIO
OF EARNINGS TO FIXED CHARGES



|                                                                          |                  |            |                               |  |                               |        |  |                               |         |   |                               |   |         |   |  |   |       
|------------------------------------------------------------------------- | ---------------- | ---------- | ----------------------------- |  | ----------------------------- | ------ |  | ----------------------------- | ------- | - | ----------------------------- | - | ------- | - |  | - | ------
|(in thousands, except ratio of earnings to fixedcharges)                  |                  | Year Ended
|                                                                          | December 27,2009 |            | December 28,2008As adjusted
* |  | December 30,2007As adjusted
* |        |  | December 31,2006As adjusted
* |         |   | December 31,2005As adjusted
*
|Earnings:                                                                 |                  |            |                               |  |                               |        |  |                               |         |   |                               |   |         |   |  |   |       
|Income (loss) before income taxes and before income from equity investees |                  | $          | 51,101                        |  | $                             | 58,280 |  | $                             | (40,385 | ) |                               | $ | (58,140 | ) |  | $ | 28,794
|Fixed charges:                                                            |                  |            |                               |  |                               |        |  |                               |         |   |                               |   |         |   |  |   |       
|Interest expense and amortization of debt issue costs                     |                  |            | 4,828                         |  |                               | 9,263  |  |                               | 14,234  |   |                               |   | 13,415  |   |  |   | 2,780 
|Rental interest factor(1)                                                 |                  |            | 3,594                         |  |                               | 3,618  |  |                               | 3,601   |   |                               |   | 3,503   |   |  |   | 3,047 
|                                                                          |                  |            |                               |  |                               |        |  |                               |         |   |                               |   |         |   |  |   |       
|Total fixed charges                                                       |                  |            | 8,422                         |  |                               | 12,881 |  |                               | 17,835  |   |                               |   | 16,918  |   |  |   | 5,827 
|                                                                          |                  |            |                               |  |                               |        |  |                               |         |   |                               |   |         |   |  |   |       
|Earnings (loss) available to cover fixed charges                          |                  | $          | 59,523                        |  | $                             | 71,161 |  | $                             | (22,550 | ) |                               | $ | (41,222 | ) |  | $ | 34,621
|                                                                          |                  |            |                               |  |                               |        |  |                               |         |   |                               |   |         |   |  |   |       
|Ratio of earnings to fixed charges(2)                                     |                  |            | 7.1x                          |  |                               | 5.5x   |  |                               |        |   |                               |   |        |   |  |   | 5.9x  
|                                                                          |                  |            |                               |  |                               |        |  |                               |         |   |                               |   |         |   |  |   |       



|* | Effective December 29, 2008, the Company retrospectively adopted Financial Accounting Standards Board Accounting Standards Codification 470, the Debt Topicfor the accounting of convertible debt instruments that may be settled in cash upon conversion (including partial cash settlements). Accordingly, the comparative consolidated financial statement amounts have been adjusted.
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The ratio of earnings to fixed charges was computed by dividing earnings by fixed charges for the periods
indicated. Earnings consist of income (loss) before provision for income taxes less income from equity investees plus fixed charges. Fixed charges consist of interest charges, amortization of debt issuance costs, and that portion of rental expense
that the Company believes to be a reasonable approximation of the interest factor included in rental expense.



|(1) | The portion of operating lease rental expense that the Company believes to be a reasonable approximation of the interest factor is deemed to be one-third of total
operating lease rental expense.
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|(2) | Earnings were inadequate to cover fixed charges by $22.6 million and $41.2 million, for fiscal years ended December 30, 2007 and December 31, 2006,
respectively.
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