The Intersil HCS163MS is a radiation hardened synchronous presettable binary counter that features lookahead carry logic for use in high-speed counting applications. Counting and parallel load, and presetting are all accomplished synchronously with the positive transition of the clock. The HCS163MS utilizes advanced CMOS/SOS technology to achieve high-speed operation. This device is a member of the radiation hardened, high-speed, CMOS/SOS logic family. The HCS163MS is supplied in a 16-lead Ceramic Flatpack (K suffix) or an SBDIP package (D suffix).