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Unfortunately, these devices are not vacuum sealed. They are, however, hermetically sealed, but there is atmospheric pressure inside the device. For more information on which device are available in a hermetically sealed package, please read the Knowledge Base article entitled "Hermetically Sealed Ultra 37000 Availability".
Please be noted our entire Cypress CPLD product are Obsolete and not recommended for new design and development. For more information on CPLD product, please visit our webpage:http://www.cypress.com/go/cpld