Apogee Semiconductor designs and sells radiation-hardened integrated circuits for space, aerospace and defense systems from Plano, Texas. Its parts are built for fault containment around commercial off-the-shelf components, letting designers use affordable COTS silicon while Apogee devices protect critical system boundaries in radiation environments. The catalog covers logic, buffers, flip-flops and registers, I/O expanders, level translators, transceivers and power switches, with total ionizing dose capability up to 300 krad. The company was founded in 2017 and its parts have flight heritage.