Crystal Specification of the EZ-USB AT2LP

Version 1
    Question: Can the same crystal be used in an EZ-USB AT2LP (CY7C68300B) based device as the one used for an AT2 device?



    When a crystal is used in the AT2LP design, Cypress recommends that for proper operation the load capacitance of the crystal should be 12 pF. This affects both the load capacitors and the crystal being used. The CY7C68300A requires a crystal with load capacitors that are between 20 pF and 33 pF, while the CY7C68300B requires a crystal with load capacitors of 12 pF. Only for test purposes should an existing BOM that has a crystal with 20 pF to 33pF be used to operate a CY7C68300B at room temperature.  For further rinformationon crystal selection for AT2LP please see the application note  :


    Migrating from AT2 to AT2LP