Exhibit 22.1
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                      Subsidiaries of Semtech Corporation

     Semtech San Diego Corporation (a California corporation), doing business as
     Edge Semiconductor Corporation, Edge Semiconductor, Semtech High
     Performance Products, Semtech ATE Division, Semtech San Diego, Semtech

     Semtech Corpus Christi Corporation (a Texas corporation)

     Semtech Corpus Christi, S.A. de C.V. (una Sociedad Mercantil de
     Nacionalidad Mexicana)

     Semtech (International) AG (a Swiss company limited by shares)

     Acapella Limited (a private limited company under the Companies Act 1985 of
     the United Kingdom, registered in England and Wales)

     Semtech France SARL

     Semtech Germany GmbH

     Semtech Limited (a private limited company under the Companies Act 1948 to
     1967 of the United Kingdom, registered in Scotland)

     Semtech St. Thomas Ltd. (a St. Thomas, U.S. Virgin Islands corporation)

     Semtech New York Corporation (a Delaware corporation), doing business as
     Semtech, Semtech HID, Semtech HID and System Management, Semtech Human
     Input Device and System Management, USAR Systems, USAR

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