INTEGRATED TELECOM EXPRESS INC/ CA
S-1/A, EX-10.20, 2000-08-17
TELEPHONE & TELEGRAPH APPARATUS
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<PAGE>
                                                               Exhibit 10.20


                                       UMC


                    ESSENTIAL TERMS FOR CAPACITY AND LOADING

14 February 2000


Rich Forte
Integrated Telecom Express, Inc.
2710 Walsh Ave
Santa Clara CA 95051

Dear Rich:

     As  requested,  this term sheet  outlines the  essentials of the
mutual commitments   between  Integrated  Telecom  Express,   Inc.  (ITeX)
and  United Microelectronics Corporation (UMC) with respect to capacity and
loading.

1.   Subject to loading by IteX as described  below, UMC will offer ITeX
rights of first refusal to a minimum quantity of eight inch wafers on the
following annual basis:

<TABLE>
<CAPTION>
------------------------- ------------------ ------------------ ------------------ ------------------
     Annual Period               2000               2001               2002                2003
------------------------- ------------------ ------------------ ------------------ ------------------
<S>                       <C>                <C>                <C>                <C>
    Wafers per Year              10K                20K                35K                 50K
------------------------- ------------------ ------------------ ------------------ ------------------
</TABLE>

2.   All wafer purchases will be at competitive pricing, and subject to UMC
standard terms, conditions and forecasting. Unless otherwise agreed in
writing, wafer quantities will be generally linear from month to month with
no abrupt changes.

3.   Conditioned upon ITeX compliance with its commitments to order from UMC
during the period involved, UMC wafer prices to ITeX will be competitive with
the prices and terms that UMC offers in the contemporaneous time period for
wafers from the same fab with equivalent technology, quantities and cycle
times.

4.   On a quarterly basis during the period January 1, 2000 to December 31,
2003, ITeX will offer to UMC purchase orders equal to or in excess of 75% of
the total ITeX foundry requirements for the relevant period(s).


CONFIDENTIAL                          -1-                    UMC(C)2000

<PAGE>

Term Sheet Outline
14 February 2000, page 2



5.   This term sheet outlines all promises, representations and agreements
between UMC and ITeX  concerning  capacity  and  loading,  and there are no
agreements, representations or promises concerning such matters other than as
stated here.




AGREED:


Integrated Telecom Express, Inc.             United Microelectronics Corporation


  /s/ Rich Forte                                        /s/ Peter Chang
------------------------------               -----------------------------------
Rich Forte, President                        Peter Chang, CEO Foundry Operations



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