IEC 61019-1:2004 specifies the methods of test and general requirements for SAW resonators using either capability approval or qualification approval procedures of the IECQ system. This first edition of IEC 61019-1 cancels and replaces the first edition of IEC 61019-1-1 published in 1990 and the first edition of IEC 61019-1-2 published in 1993. It constitutes a technical revision.