The Mercury series of ICs from Intel is obsolete. The manufacturer recommends the Cyclone® IV series as alternatives. Please review the datasheets to ensure the alternative will work for your application. Please note some of the parts have Altera listed as the manufacturer, Intel acquired Altera in Dec. 2015.
Mercury Series Part Numbers
EP1M120F484C5N
EP1M350F780C6
EP1M350F780I6N
EP1M350F780C5
EP1M120F484C5
EP1M120F484C5N
EP1M120F484C6
EP1M120F484C6N
EP1M120F484C7
EP1M120F484C7N
EP1M120F484I6
EP1M120F484I6N
EP1M350F780C5
EP1M350F780C6
EP1M350F780C7
EP1M350F780I6
EP1M350F780I6N
EP1M120F484C7A
EP1M120F484C8ES
EP1M350F780C7ES
EP1M350F780I6AA