[LOGO] IMPERIAL BANK MEMBER FDIC PROMISSORY NOTE - ---------------------------------------------------------------------------------------------- PRINCIPAL LOAN DATE MATURITY LOAN NO CALL COLLATERAL ACCOUNT OFFICER INITIALS $2,000,000.00 12-16-1999 06-16-2003 721000049 622074 619 CJ - ---------------------------------------------------------------------------------------------- References in the shaded area are for Lender's use only and do not limit the applicability of this document to any particular loan or item. - ---------------------------------------------------------------------------------------------- BORROWER: SILICON LABORATORIES INC., A DELAWARE LENDER: IMPERIAL BANK CORPORATION EMERGING GROWTH INDUSTRIES GROUP - 4635 BOSTON LANE SOUTHWEST REGIONAL OFFICE AUSTIN, TX 78735 226 AIRPORT PARKWAY SAN JOSE, CA 95110-1024 ============================================================================================== PRINCIPAL AMOUNT: $2,000,000.00 INITIAL RATE: 8.500% DATE OF NOTE: DECEMBER 16, 1999 PROMISE TO PAY. SILICON LABORATORIES INC., A DELAWARE CORPORATION ("BORROWER") PROMISES TO PAY TO IMPERIAL BANK ("LENDER"), OR ORDER, IN LAWFUL MONEY OF THE UNITED STATES OF AMERICA, THE PRINCIPAL AMOUNT OF TWO MILLION & 00/100 DOLLARS ($2,000,000.00) OR SO MUCH AS MAY BE OUTSTANDING, TOGETHER WITH INTEREST ON THE UNPAID OUTSTANDING PRINCIPAL BALANCE OF EACH ADVANCE. INTEREST SHALL BE CALCULATED FROM THE DATE OF EACH ADVANCE UNTIL REPAYMENT OF EACH ADVANCE. PAYMENT. BORROWER WILL PAY THIS LOAN IN ACCORDANCE WITH THE FOLLOWING PAYMENT SCHEDULE: ADVANCES UNDER THE NOTE SHALL BE AVAILABLE THROUGH JUNE 16, 2000 ("NON-REVOLVING DRAW PERIOD"). DURING THE NON-REVOLVING DRAW PERIOD, INTEREST ONLY SHALL BE DUE MONTHLY BEGINNING JANUARY 16, 2000. ON JUNE 16, 2000, THE OUTSTANDING PRINCIPAL BALANCE OF THE ADVANCES UNDER THE NOTE SHALL BE PAYABLE MONTHLY IN 36 EQUAL PAYMENTS OF PRINCIPAL PLUS ACCRUED INTEREST BEGINNING JULY 16, 2000. ALL PRINCIPAL AND ACCRUED BUT UNPAID INTEREST SHALL IN ANY EVENT BE DUE AND PAYABLE ON OR BEFORE JUNE 16, 2003. The annual interest rate for this Note is computed on a 365/360 basis; that is, by applying the ratio of the annual interest rate over a year of 360 days, multiplied by the outstanding principal balance, multiplied by the actual number of days the principal balance is outstanding. Borrower will pay Lender at Lender's address shown above or at such other place as Lender may designate in writing. Unless otherwise agreed or required by applicable law, payments will be applied first to any unpaid collection costs and any late charges, then to any unpaid interest, and any remaining amount to principal. VARIABLE INTEREST RATE. The interest rate on this Note is subject to change from time to time based on changes in an index which is the Imperial Bank Prime Rate (the "Index"). The Prime Rate is the rate announced by Lender as its Prime Rate of interest from time to time. Lender will tell Borrower the current Index rate upon Borrower's request. Borrower understands that Lender may make loans based on other rates as well. The interest rate change will not occur more often than each day. THE INDEX CURRENTLY IS 8.500%. THE INTEREST RATE TO BE APPLIED TO THE UNPAID PRINCIPAL BALANCE OF THIS NOTE WILL BE AT A RATE EQUAL TO THE INDEX, RESULTING IN AN INITIAL RATE OF 8.500%. NOTICE: Under no circumstances will the interest rate on this Note be more than the maximum rate allowed by applicable law. PREPAYMENT; MINIMUM INTEREST CHARGE. Borrower agrees that all loan fees and other prepaid finance charges are earned fully as of the date of the loan and will not be subject to refund upon early payment (whether voluntary or as a result of default), except as otherwise required by law. In any event, even upon full prepayment of this Note, Borrower understands that Lender is entitled to a MINIMUM INTEREST CHARGE OF $250.00. Other than Borrower's obligation to pay any minimum interest charge, Borrower may pay without penalty all or a portion of the amount owed earlier than it is due. Early payments will not, unless agreed to by Lender in writing, relieve Borrower of Borrower's obligation to continue to make payments of accrued unpaid interest. Rather, they will reduce the principal balance due. LATE CHARGE. If a payment is 10 DAYS OR MORE LATE, Borrower will be charged 5.000% OF THE UNPAID PORTION OF THE REGULARLY SCHEDULED PAYMENT. DEFAULT. Borrower will be in default if any of the following happens: (a) "Borrower fails to make any payment when due which is not cured by Borrower within ten (10) days of receipt of notice thereof". (b) Borrower breaks any promise Borrower has made to Lender, or Borrower fails to comply with or to perform when due any other term, obligation, covenant, or condition contained in this Note or any agreement related to this Note, or in any other agreement or loan Borrower has with Lender. (c) Any representation or statement made or furnished to Lender by Borrower or on Borrower's behalf is false or misleading in any meterial respect either now or at the time made or furnished. (d) Borrower becomes insolvent, a receiver is appointed for any part of Borrower's property, Borrower makes an assignment for the benefit of creditors, or any proceeding is commenced either by Borrower or against Borrower under any bankruptcy or insolvency laws. (e) Any creditor tries to take any of Borrower's property on or in which Lender has a lien or security interest. This includes a garnishment of any of Borrower's accounts with Lender. (g) A material adverse change occurs in Borrower's financial condition, or Lender believes the prospect of payment or performance of the indebtedness is impaired. If any default, other than a default in payment, is curable and if Borrower has not been given a notice of a breach of the same provision of this Note within the preceding twelve (12) months, it may be cured (and no event of default will have occurred) if Borrower, after receiving written notice from Lender demanding cure of such default: (a) cures the default within ten (10) days; or (b) if the cure requires more than ten (10) days, immediately initiates steps which Lender deems in Lender's sole discretion to be sufficient to cure the default and thereafter continues and completes all reasonable and necessary steps sufficient to produce compliance as soon as reasonably practical. LENDER'S RIGHTS. Upon default, Lender may declare the entire unpaid principal balance on this Note and all accrued unpaid interest immediately due, without notice, and then Borrower will pay that amount. Upon Borrower's failure to pay all amounts declared due pursuant to this section, including failure to pay upon final maturity, Lender, at its option, may also, if permitted under applicable law, do one or both of the following: (a) increase the variable interest rate on this Note to 5.000 percentage points over the Index, and (b) add any unpaid accrued interest to principal and such sum will bear interest therefrom until paid at the rate provided in this Note (including any increased rate). Lender may hire or pay someone else to help collect this Note if Borrower does not pay. Borrower also will pay Lender that amount. This includes, subject to any limits under applicable law, Lender's attorneys' fees and Lender's legal expenses whether or not there is a lawsuit, including attorneys' fees and legal expenses for bankruptcy proceedings (including efforts to modify or vacate any automatic stay or injunction), appeals, and any anticipated post-judgment collection services. Borrower also will pay any court costs, in addition to all other sums provided by law. THIS NOTE HAS BEEN DELIVERED TO LENDER AND ACCEPTED BY LENDER IN THE STATE OF CALIFORNIA. IF THERE IS A LAWSUIT, BORROWER AGREES UPON LENDER'S REQUEST TO SUBMIT TO THE JURISDICTION OF THE COURTS OF LOS ANGELES COUNTY, THE STATE OF CALIFORNIA. LENDER AND BORROWER HEREBY WAIVE THE RIGHT TO ANY JURY TRIAL IN ANY ACTION, PROCEEDING, OR COUNTERCLAIM BROUGHT BY EITHER LENDER OR BORROWER AGAINST THE OTHER. (INITIAL HERE NSS JMcG) THIS NOTE SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF CALIFORNIA. DISHONORED ITEM FEE. Borrower will pay a fee to Lender of $25.00 if Borrower makes a payment on Borrower's loan and the check or preauthorized charge with which Borrower pays is later dishonored. RIGHT OF SETOFF. Borrower grants to Lender a contractual security interest in, and hereby assigns, conveys, delivers, pledges, and transfers to Lender all Borrower's right, title and interest in and to, Borrower's accounts with Lender (whether checking, savings, or some other account), including without limitation all accounts held jointly with someone else and all accounts Borrower may open in the future, excluding however all IRA and Keogh accounts, and all trust accounts for which the grant of a security interest would be prohibited by law. Borrower authorizes Lender, to the extent permitted by applicable law, to charge or setoff all sums owing on this Note against any and all such accounts. LINE OF CREDIT. This Note evidences a straight line of credit. Once the total amount of principal has been advanced, Borrower is not entitled to further loan advances. Advances under this Note may be requested orally by Borrower or by an authorized person. All oral requests shall be confirmed in writing on the day of the request. All communications, instructions, or directions by telephone or otherwise to Lender are to be directed to Lender's office shown above. The following party or parties are authorized to request advances under the line of credit until Lender receives from Borrower at Lender's address shown above written notice of revocation of their authority: JOHN MCGOVERN, CFO/SECRETARY; AND NAVDEEP S. SOOCH, CHAIRMAN/CEO. Borrower agrees to be liable for all sums either: (a) advanced in accordance with the instructions of an authorized person or (b) credited to any of Borrower's accounts with Lender. The unpaid principal balance owing on this Note at any time may be evidenced by endorsements on this Note or by Lender's internal records, including daily computer print-outs. Lender will have no obligation to advance funds under this Note if: (a) Borrower is in default under the terms of this Note or any agreement that Borrower has with Lender, including any agreement made in connection with the signing of this Note; (b) Borrower ceases doing business or is insolvent; (c) (d) Borrower has applied funds provided pursuant to this Note for purposes other than those authorized by Lender; or (e) 12-16-1999 PROMISSORY NOTE Page 2 (CONTINUED) ================================================================================ JMcG NSS CJ ----- ----- ---- REFERENCE PROVISION. 1. Other than (i) non-judicial foreclosure and all matters in connection therewith regarding security interests in real or personal property; or (ii) the appointment of a receiver, or the exercise of other provisional remedies (any and all of which may be initiated pursuant to applicable law), each controversy, dispute or claim between the parties arising out of or relating to this document ("Agreement"), which controversy, dispute or claim is not settled in writing within thirty (30) days after the "Claim Date" (defined as the date on which a party subject to the Agreement gives written notice to all other parties that a controversy, dispute or claim exists), will be settled by a reference proceeding in California in accordance with the provisions of Section 638 et seq. of the California Code of Civil Procedure, or their successor section ("CCP"), which shall constitute the exclusive remedy for the settlement of any controversy, dispute or claim concerning this Agreement, including whether such controversy, dispute or claim is subject to the reference proceeding and except as set forth above, the parties waive their rights to initiate any legal proceedings against each other in any court or jurisdiction other than the Superior Court in the County where the Real Property, if any, is located or Los Angeles County if none (the "Court"). The referee shall be a retired Judge of the Court selected by mutual agreement of the parties, and if they cannot so agree within forty-five (45) days after the Claim Date, the referee shall be promptly selected by the Presiding Judge of the Court (or his representative). The referee shall be appointed to sit as a temporary judge, with all of the powers for a temporary judge, as authorized by law, and upon selection should take and subscribe to the oath of office as provided for in Rule 244 of the California Rules of Court (or any subsequently enacted Rule). Each party shall have one peremptory challenge pursuant to CCP 170.6 The referee shall (a) be requested to set the matter for hearing within sixty (60) days after the Claim Date and (b) try any and all issues of law or fact and report a statement of decision upon them, if possible, within ninety (90) days of the Claim Date. Any decision rendered by the referee will be final, binding and conclusive and judgment shall be entered pursuant to CCP 644 in any court in the State of California having jurisdiction. Any party may apply for a reference proceeding at any time after thirty (30) days following notice to any other party of the nature of the controversy, dispute or claim, by filing a petition for a hearing and/or trial. All discovery permitted by this Agreement shall be completed no later than fifteen (15) days before the first hearing date established by the referee. The referee may extend such period in the event of a party's refusal to provide requested discovery for any reason whatsoever, including, without limitation, legal objections raised to such discovery or unavailability of a witness due to absence or illness. No party shall be entitled to "priority" in conducting discovery. Depositions may be taken by either party upon seven (7) days written notice, and request for production or inspection of documents shall be responded to within ten (10) days after service. All disputes relating to discovery which cannot be resolved by the parties shall be submitted to the referee whose decision shall be final and binding upon the parties. Pending appointment of the referee as provided herein, the Superior Court is empowered to issue temporary and/or provisional remedies, as appropriate. 2. Except as expressly set forth in this Agreement, the referee shall determine the manner in which the reference proceeding is conducted including the time and place of all hearings, the order of presentation of evidence, and all other questions that arise with respect to the course of the reference proceeding. All proceedings and hearings conducted before the referee, except for trial, shall be conducted without a court reporter, except that when any party so requests, a court reporter will be used at any hearing conducted before the referee. The party making such a request shall have the obligation to arrange for and pay for the court reporter. The costs of the court reporter at the trial shall be borne equally by the parties. 3. The referee shall be required to determine all issues in accordance with existing case law and the statutory laws of the State of California. The rules of evidence applicable to proceedings at law in the State of California will be applicable to the reference proceeding. The referee shall be empowered to enter equitable as well as legal relief, to provide all temporary and/or provisional remedies and to enter equitable orders that will be binding upon the parties. The referee shall issue a single judgment at the close of the reference proceeding which shall dispose of all of the claims of the parties that are the subject of the reference. The parties hereto expressly reserve the right to contest or appeal from the final judgment or any appealable order or appealable judgment entered by the referee. The parties hereto expressly reserve the right to findings of fact, conclusions of law, a written statement of decision, and the right to move for a new trial or a different judgment, which new trial, if granted, is also to be a reference proceeding under this provision. 4. In the event that the enabling legislation which provides for appointment of a referee is repealed (and no successor statute is enacted), any dispute between the parties that would otherwise be determined by the reference procedure herein described will be resolved and determined by arbitration. The arbitration will be conducted by a retired judge of the Court, in accordance with the California Arbitration Act, 1280 through 1294.2 of the CCP as amended from time to time. The limitations with respect to discovery as set forth hereinabove shall apply to any such arbitration proceeding. CREDIT TERMS AND CONDITIONS AGREEMENT. This Note is subject to the provisions of the Credit Terms and Conditions Agreement dated March 28, 1997 and all amendments thereto and replacements therefor. GENERAL PROVISIONS. Lender may delay or forgo enforcing any of its rights or remedies under this Note without losing them. Borrower and any other person who signs, or endorses this Note, to the extent allowed by law, waive any applicable statute of limitations, presentment, demand for payment, protest and notice of dishonor. Upon any change in the terms of this Note, and unless otherwise expressly stated in writing, no party who signs this Note, whether as maker, accommodation maker or endorser, shall be released from liability. All such parties agree that Lender may renew or extend (repeatedly and for any length of time) this loan, or release any party or guarantor or collateral; or impair, fail to realize upon or perfect Lender's security interest in the collateral; and take any other action deemed necessary by Lender without the consent of or notice to anyone. All such parties also agree that Lender may modify this loan without the consent of or notice to anyone other than the party with whom the modification is made. PRIOR TO SIGNING THIS NOTE, BORROWER READ AND UNDERSTOOD ALL THE PROVISIONS OF THIS NOTE, INCLUDING THE VARIABLE INTEREST RATE PROVISIONS. BORROWER AGREES TO THE TERMS OF THE NOTE AND ACKNOWLEDGES RECEIPT OF A COMPLETED COPY OF THE NOTE. BORROWER: SILICON LABORATORIES INC., A DELAWARE CORPORATION BY: /s/ John W. McGovern BY: /s/ Navdeep S. Sooch ------------------------------- ------------------------------- JOHN MCGOVERN, CFO/SECRETARY NAVDEEP S. SOOCH, CHAIRMAN/CEO ===============================================================================