Radiation Hardened Small Scale Integrated Circuits for Nuclear Surety

"The proposed project will design, simulate, and perform layout on a series of small scale integrated circuits to be used as replacements for 5400 series devices used in many military and space systems. The 5400 series microcircuits were originallydeveloped as bipolar TTL (transistor-transistor logic) devices and then redesigned into new bipolar and CMOS technologies as they became available. The devices are used universally throughout existing military and space systems and continue to be designedinto new systems. Unfortunately, many vendors are stopping production on the devices because of reduced demand from the commercial sector. Device types with demonstrated radiation hardness needed for many military and space systems are particularlydifficult to find. The proposed designs employ a unique processing technology and design methodology to provide radiation hardened 5400 series parts. The devices can be operated at either 5 volts or 3.3 volts to assure compatibility with both existingsystems and new, low voltage systems. The 5400 series of small scale integrated circuits are found throughout military and space systems. However, radiation hardened versions of those devices are rapidly becoming unobtainable due to the small numberrequired and the advances of technology to higher levels of integration. The proposed development of a radiation hardened series of 5400 part types will permit sales to both new and existing military