A radiation-hardened 16/32-bit microprocessor

A single-chip radiation-hardened 16/32-bit microprocessor (the SA3300) has been designed, fabricated, and tested. The SA3300 is designed to withstand high levels of ionizing radiation and is resistant to single-event upset (SEU) caused by heavy ions. New techniques were used to improve immunity to SEU effects in combinational logic. Testing has demonstrated that the SA3300 is functional after a total gamma dose of 5 Mrad(Si). The device does not suffer latchup from SEU, and parts without SEU resistors have an SEU linear energy transfer (LET) upset threshold greater than 28 MeV/mg/cm/sup 2/.<
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