Support is limited to customers who have already adopted these products. The Intersil HCS04MS is a Radiation Hardened Hex Inverter. A logic level on any input forces the output to the opposite logic state. The HCS04MS utilizes advanced CMOS/SOS technology to achieve high-speed operation. This device is a member of radiation hardened, high-speed, CMOS/SOS Logic Family. The HCS04MS is supplied in a 14 lead Ceramic flatpack (K suffix) or a SBDIP Package (D suffix).